root/chrome/browser/prerender/prerender_browsertest.cc

DEFINITIONS

1. CreateClientRedirect
2. CreateServerRedirect
3. ClearBrowsingData
4. ShouldAbortPrerenderBeforeSwap
5. WaitForASCIITitle
6. WatchChannel
7. WaitForChannelClose
8. watcher_
9. OnMessageReceived
10. OnChannelDestroyed
11. number_of_loads_
12. number_of_loads_
13. Wait
14. DidStartLoading
15. DidStopLoading
16. TabReplacedAt
17. Wait
18. OnTabAdded
19. skip_final_checks_
20. RenderProcessGone
21. CheckURL
22. set_should_be_shown
23. set_skip_final_checks
24. expected_final_status
25. OnRenderViewHostCreated
26. Observe
27. expected_number_of_loads_
28. contents
29. number_of_loads
30. WaitForCreate
31. WaitForStart
32. WaitForStop
33. WaitForLoads
34. OnPrerenderCreated
35. OnPrerenderStart
36. OnPrerenderStopLoading
37. OnPrerenderStop
38. OnPrerenderCreatedMatchCompleteReplacement
39. ExpectPrerenderContents
40. CreatePrerenderContents
41. threat_type_
42. CheckBrowseUrl
43. SetThreatTypeForUrl
44. OnCheckBrowseURLDone
45. fake_database_manager
46. CreateDatabaseManager
47. CreateSafeBrowsingService
48. most_recent_service
49. InspectedContentsClosing
50. DispatchOnInspectorFrontend
51. ReplacedWithAnotherClient
52. Start
53. first_run_
54. MaybeCreateJob
55. CreateHangingFirstRequestProtocolHandlerOnIO
56. set_start_callback
57. Start
58. expected_count_
59. count
60. RequestStarted
61. WaitForCount
62. weak_factory_
63. MaybeCreateJob
64. RequestStarted
65. CreateCountingProtocolHandlerOnIO
66. CreateMockProtocolHandlerOnIO
67. ShouldAllowOpenURL
68. ShouldSwapProcessesForRedirect
69. CreateShellWorker
70. GetBlockState
71. BlockRequest
72. RunExternalProtocolDialog
73. LaunchUrlWithoutSecurityCheck
74. FinishedProcessingCheck
75. GetTestPath
76. explicitly_set_browser_
77. GetSessionStorageNamespace
78. SetUpInProcessBrowserTestFixture
79. TearDownInProcessBrowserTestFixture
80. SetUpCommandLine
81. SetUpOnMainThread
82. GetActiveWebContents
83. PrerenderTestURL
84. PrerenderTestURL
85. PrerenderTestURL
86. NavigateToDestURL
87. NavigateToDestURLWithDisposition
88. NavigateToURL
89. NavigateToURLWithDisposition
90. NavigateToURLWithDisposition
91. NavigateToURLWithParams
92. OpenDestURLViaClick
93. OpenURLViaClick
94. OpenDestURLViaClickTarget
95. OpenDestURLViaClickPing
96. OpenDestURLViaClickNewWindow
97. OpenDestURLViaClickNewForegroundTab
98. OpenDestURLViaClickNewBackgroundTab
99. OpenDestURLViaWindowOpen
100. RemoveLinkElement
101. ClickToNextPageAfterPrerender
102. NavigateToNextPageAfterPrerender
103. GoBackToPrerender
104. GoBackToPageBeforePrerender
105. UrlIsInPrerenderManager
106. UrlIsInPrerenderManager
107. UseHttpsSrcServer
108. DisableJavascriptCalls
109. DisableLoadEventCheck
110. GetModel
111. GetPrerenderManager
112. GetPrerenderLinkManager
113. GetPrerenderEventCount
114. DidReceivePrerenderStartEventForLinkNumber
115. GetPrerenderLoadEventCountForLinkNumber
116. GetPrerenderDomContentLoadedEventCountForLinkNumber
117. DidReceivePrerenderStopEventForLinkNumber
118. WaitForPrerenderEventCount
119. HadPrerenderEventErrors
120. IsEmptyPrerenderLinkManager
121. GetLinkPrerenderCount
122. GetRunningLinkPrerenderCount
123. GetHistoryLength
124. GetFakeSafeBrowsingDatabaseManager
125. GetPrerenderContentsFor
126. SetLoaderHostOverride
127. set_loader_path
128. set_loader_query
129. GetCrossDomainTestUrl
130. set_browser
131. current_browser
132. dest_url
133. IncreasePrerenderMemory
134. DidPrerenderPass
135. DidDisplayPass
136. ExpectPrerender
137. AddPrerender
138. MatchTaskManagerTab
139. MatchTaskManagerPrerender
140. GetPrerenderContents
141. PrerenderTestURLImpl
142. NavigateToURLImpl
143. OpenURLWithJSImpl
144. IN_PROC_BROWSER_TEST_F
145. IN_PROC_BROWSER_TEST_F
146. IN_PROC_BROWSER_TEST_F
147. IN_PROC_BROWSER_TEST_F
148. IN_PROC_BROWSER_TEST_F
149. IN_PROC_BROWSER_TEST_F
150. IN_PROC_BROWSER_TEST_F
151. IN_PROC_BROWSER_TEST_F
152. IN_PROC_BROWSER_TEST_F
153. IN_PROC_BROWSER_TEST_F
154. IN_PROC_BROWSER_TEST_F
155. IN_PROC_BROWSER_TEST_F
156. IN_PROC_BROWSER_TEST_F
157. IN_PROC_BROWSER_TEST_F
158. IN_PROC_BROWSER_TEST_F
159. IN_PROC_BROWSER_TEST_F
160. IN_PROC_BROWSER_TEST_F
161. IN_PROC_BROWSER_TEST_F
162. IN_PROC_BROWSER_TEST_F
163. IN_PROC_BROWSER_TEST_F
164. IN_PROC_BROWSER_TEST_F
165. IN_PROC_BROWSER_TEST_F
166. IN_PROC_BROWSER_TEST_F
167. IN_PROC_BROWSER_TEST_F
168. IN_PROC_BROWSER_TEST_F
169. IN_PROC_BROWSER_TEST_F
170. IN_PROC_BROWSER_TEST_F
171. IN_PROC_BROWSER_TEST_F
172. IN_PROC_BROWSER_TEST_F
173. IN_PROC_BROWSER_TEST_F
174. IN_PROC_BROWSER_TEST_F
175. IN_PROC_BROWSER_TEST_F
176. IN_PROC_BROWSER_TEST_F
177. IN_PROC_BROWSER_TEST_F
178. IN_PROC_BROWSER_TEST_F
179. IN_PROC_BROWSER_TEST_F
180. IN_PROC_BROWSER_TEST_F
181. IN_PROC_BROWSER_TEST_F
182. IN_PROC_BROWSER_TEST_F
183. IN_PROC_BROWSER_TEST_F
184. IN_PROC_BROWSER_TEST_F
185. IN_PROC_BROWSER_TEST_F
186. IN_PROC_BROWSER_TEST_F
187. IN_PROC_BROWSER_TEST_F
188. IN_PROC_BROWSER_TEST_F
189. IN_PROC_BROWSER_TEST_F
190. IN_PROC_BROWSER_TEST_F
191. IN_PROC_BROWSER_TEST_F
192. IN_PROC_BROWSER_TEST_F
193. IN_PROC_BROWSER_TEST_F
194. IN_PROC_BROWSER_TEST_F
195. IN_PROC_BROWSER_TEST_F
196. IN_PROC_BROWSER_TEST_F
197. IN_PROC_BROWSER_TEST_F
198. IN_PROC_BROWSER_TEST_F
199. IN_PROC_BROWSER_TEST_F
200. IN_PROC_BROWSER_TEST_F
201. IN_PROC_BROWSER_TEST_F
202. IN_PROC_BROWSER_TEST_F
203. IN_PROC_BROWSER_TEST_F
204. IN_PROC_BROWSER_TEST_F
205. IN_PROC_BROWSER_TEST_F
206. IN_PROC_BROWSER_TEST_F
207. IN_PROC_BROWSER_TEST_F
208. IN_PROC_BROWSER_TEST_F
209. IN_PROC_BROWSER_TEST_F
210. IN_PROC_BROWSER_TEST_F
211. IN_PROC_BROWSER_TEST_F
212. IN_PROC_BROWSER_TEST_F
213. IN_PROC_BROWSER_TEST_F
214. IN_PROC_BROWSER_TEST_F
215. IN_PROC_BROWSER_TEST_F
216. IN_PROC_BROWSER_TEST_F
217. IN_PROC_BROWSER_TEST_F
218. IN_PROC_BROWSER_TEST_F
219. IN_PROC_BROWSER_TEST_F
220. IN_PROC_BROWSER_TEST_F
221. IN_PROC_BROWSER_TEST_F
222. IN_PROC_BROWSER_TEST_F
223. GetClientCerts
224. CreateCertStore
225. IN_PROC_BROWSER_TEST_F
226. IN_PROC_BROWSER_TEST_F
227. IN_PROC_BROWSER_TEST_F
228. IN_PROC_BROWSER_TEST_F
229. IN_PROC_BROWSER_TEST_F
230. IN_PROC_BROWSER_TEST_F
231. IN_PROC_BROWSER_TEST_F
232. IN_PROC_BROWSER_TEST_F
233. IN_PROC_BROWSER_TEST_F
234. IN_PROC_BROWSER_TEST_F
235. IN_PROC_BROWSER_TEST_F
236. IN_PROC_BROWSER_TEST_F
237. IN_PROC_BROWSER_TEST_F
238. IN_PROC_BROWSER_TEST_F
239. IN_PROC_BROWSER_TEST_F
240. IN_PROC_BROWSER_TEST_F
241. IN_PROC_BROWSER_TEST_F
242. IN_PROC_BROWSER_TEST_F
243. IN_PROC_BROWSER_TEST_F
244. IN_PROC_BROWSER_TEST_F
245. IN_PROC_BROWSER_TEST_F
246. IN_PROC_BROWSER_TEST_F
247. IN_PROC_BROWSER_TEST_F
248. IN_PROC_BROWSER_TEST_F
249. IN_PROC_BROWSER_TEST_F
250. IN_PROC_BROWSER_TEST_F
251. IN_PROC_BROWSER_TEST_F
252. IN_PROC_BROWSER_TEST_F
253. IN_PROC_BROWSER_TEST_F
254. IN_PROC_BROWSER_TEST_F
255. IN_PROC_BROWSER_TEST_F
256. SetUpCommandLine
257. IN_PROC_BROWSER_TEST_F
258. IN_PROC_BROWSER_TEST_F
259. IN_PROC_BROWSER_TEST_F
260. IN_PROC_BROWSER_TEST_F
261. SetUp
262. SetUpCommandLine
263. SetUpInProcessBrowserTestFixture
264. TearDownInProcessBrowserTestFixture
265. SetUpOnMainThread
266. IN_PROC_BROWSER_TEST_F
267. IN_PROC_BROWSER_TEST_F
268. IN_PROC_BROWSER_TEST_F
269. IN_PROC_BROWSER_TEST_F
270. IN_PROC_BROWSER_TEST_F
271. IN_PROC_BROWSER_TEST_F
272. IN_PROC_BROWSER_TEST_F
273. IN_PROC_BROWSER_TEST_F
274. IN_PROC_BROWSER_TEST_F
275. IN_PROC_BROWSER_TEST_F
276. IN_PROC_BROWSER_TEST_F
277. IN_PROC_BROWSER_TEST_F
278. IN_PROC_BROWSER_TEST_F
279. IN_PROC_BROWSER_TEST_F
280. IN_PROC_BROWSER_TEST_F
281. IN_PROC_BROWSER_TEST_F
282. IN_PROC_BROWSER_TEST_F
283. IN_PROC_BROWSER_TEST_F
284. IN_PROC_BROWSER_TEST_F
285. IN_PROC_BROWSER_TEST_F
286. IN_PROC_BROWSER_TEST_F
287. IN_PROC_BROWSER_TEST_F
288. IN_PROC_BROWSER_TEST_F
289. IN_PROC_BROWSER_TEST_F
290. IN_PROC_BROWSER_TEST_F
291. IN_PROC_BROWSER_TEST_F
292. IN_PROC_BROWSER_TEST_F
293. IN_PROC_BROWSER_TEST_F
294. IN_PROC_BROWSER_TEST_F
295. IN_PROC_BROWSER_TEST_F
296. IN_PROC_BROWSER_TEST_F
297. IN_PROC_BROWSER_TEST_F
298. SetUpOnMainThread
299. IN_PROC_BROWSER_TEST_F

// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include <deque>
#include <vector>

#include "base/bind.h"
#include "base/command_line.h"
#include "base/files/file_path.h"
#include "base/memory/ref_counted_memory.h"
#include "base/memory/scoped_vector.h"
#include "base/memory/weak_ptr.h"
#include "base/path_service.h"
#include "base/prefs/pref_service.h"
#include "base/run_loop.h"
#include "base/strings/string_util.h"
#include "base/strings/stringprintf.h"
#include "base/strings/utf_string_conversions.h"
#include "base/test/test_timeouts.h"
#include "base/values.h"
#include "chrome/browser/browsing_data/browsing_data_helper.h"
#include "chrome/browser/browsing_data/browsing_data_remover.h"
#include "chrome/browser/chrome_content_browser_client.h"
#include "chrome/browser/chrome_notification_types.h"
#include "chrome/browser/content_settings/host_content_settings_map.h"
#include "chrome/browser/extensions/api/web_navigation/web_navigation_api.h"
#include "chrome/browser/extensions/extension_apitest.h"
#include "chrome/browser/external_protocol/external_protocol_handler.h"
#include "chrome/browser/favicon/favicon_tab_helper.h"
#include "chrome/browser/prerender/prerender_contents.h"
#include "chrome/browser/prerender/prerender_handle.h"
#include "chrome/browser/prerender/prerender_link_manager.h"
#include "chrome/browser/prerender/prerender_link_manager_factory.h"
#include "chrome/browser/prerender/prerender_manager.h"
#include "chrome/browser/prerender/prerender_manager_factory.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/profiles/profile_io_data.h"
#include "chrome/browser/renderer_host/chrome_resource_dispatcher_host_delegate.h"
#include "chrome/browser/safe_browsing/database_manager.h"
#include "chrome/browser/safe_browsing/safe_browsing_service.h"
#include "chrome/browser/safe_browsing/safe_browsing_util.h"
#include "chrome/browser/task_manager/task_manager.h"
#include "chrome/browser/task_manager/task_manager_browsertest_util.h"
#include "chrome/browser/ui/browser.h"
#include "chrome/browser/ui/browser_commands.h"
#include "chrome/browser/ui/browser_finder.h"
#include "chrome/browser/ui/browser_navigator.h"
#include "chrome/browser/ui/browser_window.h"
#include "chrome/browser/ui/tabs/tab_strip_model.h"
#include "chrome/browser/ui/tabs/tab_strip_model_observer.h"
#include "chrome/common/chrome_paths.h"
#include "chrome/common/chrome_switches.h"
#include "chrome/common/extensions/extension_constants.h"
#include "chrome/common/extensions/mime_types_handler.h"
#include "chrome/common/pref_names.h"
#include "chrome/test/base/in_process_browser_test.h"
#include "chrome/test/base/test_switches.h"
#include "chrome/test/base/ui_test_utils.h"
#include "chrome/test/base/uma_histogram_helper.h"
#include "content/public/browser/browser_message_filter.h"
#include "content/public/browser/devtools_agent_host.h"
#include "content/public/browser/devtools_client_host.h"
#include "content/public/browser/devtools_manager.h"
#include "content/public/browser/navigation_controller.h"
#include "content/public/browser/navigation_entry.h"
#include "content/public/browser/notification_service.h"
#include "content/public/browser/render_frame_host.h"
#include "content/public/browser/render_process_host.h"
#include "content/public/browser/render_view_host.h"
#include "content/public/browser/site_instance.h"
#include "content/public/browser/web_contents.h"
#include "content/public/browser/web_contents_observer.h"
#include "content/public/common/url_constants.h"
#include "content/public/test/browser_test_utils.h"
#include "content/public/test/test_navigation_observer.h"
#include "content/public/test/test_utils.h"
#include "content/test/net/url_request_mock_http_job.h"
#include "extensions/common/switches.h"
#include "grit/generated_resources.h"
#include "net/base/escape.h"
#include "net/cert/x509_certificate.h"
#include "net/dns/mock_host_resolver.h"
#include "net/ssl/client_cert_store.h"
#include "net/ssl/ssl_cert_request_info.h"
#include "net/url_request/url_request_context.h"
#include "net/url_request/url_request_context_getter.h"
#include "net/url_request/url_request_filter.h"
#include "net/url_request/url_request_job.h"
#include "ui/base/l10n/l10n_util.h"
#include "url/gurl.h"

using content::BrowserThread;
using content::DevToolsAgentHost;
using content::DevToolsClientHost;
using content::DevToolsManager;
using content::NavigationController;
using content::OpenURLParams;
using content::Referrer;
using content::RenderFrameHost;
using content::RenderViewHost;
using content::RenderWidgetHost;
using content::TestNavigationObserver;
using content::WebContents;
using content::WebContentsObserver;
using task_manager::browsertest_util::WaitForTaskManagerRows;

// Prerender tests work as follows:
//
// A page with a prefetch link to the test page is loaded.  Once prerendered,
// its Javascript function DidPrerenderPass() is called, which returns true if
// the page behaves as expected when prerendered.
//
// The prerendered page is then displayed on a tab.  The Javascript function
// DidDisplayPass() is called, and returns true if the page behaved as it
// should while being displayed.

namespace prerender {

namespace {

// Constants used in the test HTML files.
const char* kReadyTitle = "READY";
const char* kPassTitle = "PASS";

std::string CreateClientRedirect(const std::string& dest_url) {
  const char* const kClientRedirectBase = "client-redirect?";
  return kClientRedirectBase + net::EscapeQueryParamValue(dest_url, false);
}

std::string CreateServerRedirect(const std::string& dest_url) {
  const char* const kServerRedirectBase = "server-redirect?";
  return kServerRedirectBase + net::EscapeQueryParamValue(dest_url, false);
}

// Clears the specified data using BrowsingDataRemover.
void ClearBrowsingData(Browser* browser, int remove_mask) {
  BrowsingDataRemover* remover =
      BrowsingDataRemover::CreateForUnboundedRange(browser->profile());
  remover->Remove(remove_mask, BrowsingDataHelper::UNPROTECTED_WEB);
  // BrowsingDataRemover deletes itself.
}

// Returns true if the prerender is expected to abort on its own, before
// attempting to swap it.
bool ShouldAbortPrerenderBeforeSwap(FinalStatus status) {
  switch (status) {
    case FINAL_STATUS_USED:
    case FINAL_STATUS_WINDOW_OPENER:
    case FINAL_STATUS_APP_TERMINATING:
    case FINAL_STATUS_CACHE_OR_HISTORY_CLEARED:
    // We'll crash the renderer after it's loaded.
    case FINAL_STATUS_RENDERER_CRASHED:
    case FINAL_STATUS_CANCELLED:
    case FINAL_STATUS_DEVTOOLS_ATTACHED:
    case FINAL_STATUS_PAGE_BEING_CAPTURED:
    case FINAL_STATUS_NAVIGATION_UNCOMMITTED:
    case FINAL_STATUS_WOULD_HAVE_BEEN_USED:
      return false;
    default:
      return true;
  }
}

// Convenience function to wait for a title. Handles the case when the
// WebContents already has the expected title.
void WaitForASCIITitle(WebContents* web_contents,
                       const char* expected_title_ascii) {
  base::string16 expected_title = base::ASCIIToUTF16(expected_title_ascii);
  if (web_contents->GetTitle() == expected_title)
    return;
  content::TitleWatcher title_watcher(web_contents, expected_title);
  EXPECT_EQ(expected_title, title_watcher.WaitAndGetTitle());
}

// Waits for the destruction of a RenderProcessHost's IPC channel.
// Used to make sure the PrerenderLinkManager's OnChannelClosed function has
// been called, before checking its state.
class ChannelDestructionWatcher {
 public:
  ChannelDestructionWatcher() : channel_destroyed_(false) {
  }

  ~ChannelDestructionWatcher() {
  }

  void WatchChannel(content::RenderProcessHost* host) {
    host->AddFilter(new DestructionMessageFilter(this));
  }

  void WaitForChannelClose() {
    run_loop_.Run();
    EXPECT_TRUE(channel_destroyed_);
  }

 private:
  // When destroyed, calls ChannelDestructionWatcher::OnChannelDestroyed.
  // Ignores all messages.
  class DestructionMessageFilter : public content::BrowserMessageFilter {
   public:
     explicit DestructionMessageFilter(ChannelDestructionWatcher* watcher)
         : BrowserMessageFilter(0),
           watcher_(watcher) {
    }

   private:
    virtual ~DestructionMessageFilter() {
      content::BrowserThread::PostTask(
          content::BrowserThread::UI, FROM_HERE,
          base::Bind(&ChannelDestructionWatcher::OnChannelDestroyed,
                     base::Unretained(watcher_)));
    }

    virtual bool OnMessageReceived(const IPC::Message& message,
                                   bool* message_was_ok) OVERRIDE {
      return false;
    }

    ChannelDestructionWatcher* watcher_;

    DISALLOW_COPY_AND_ASSIGN(DestructionMessageFilter);
  };

  void OnChannelDestroyed() {
    DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));

    EXPECT_FALSE(channel_destroyed_);
    channel_destroyed_ = true;
    run_loop_.Quit();
  }

  bool channel_destroyed_;
  base::RunLoop run_loop_;

  DISALLOW_COPY_AND_ASSIGN(ChannelDestructionWatcher);
};

// A navigation observer to wait on either a new load or a swap of a
// WebContents. On swap, if the new WebContents is still loading, wait for that
// load to complete as well. Note that the load must begin after the observer is
// attached.
class NavigationOrSwapObserver : public WebContentsObserver,
                                 public TabStripModelObserver {
 public:
  // Waits for either a new load or a swap of |tab_strip_model|'s active
  // WebContents.
  NavigationOrSwapObserver(TabStripModel* tab_strip_model,
                           WebContents* web_contents)
      : WebContentsObserver(web_contents),
        tab_strip_model_(tab_strip_model),
        did_start_loading_(false),
        number_of_loads_(1) {
    CHECK_NE(TabStripModel::kNoTab,
             tab_strip_model->GetIndexOfWebContents(web_contents));
    tab_strip_model_->AddObserver(this);
  }

  // Waits for either |number_of_loads| loads or a swap of |tab_strip_model|'s
  // active WebContents.
  NavigationOrSwapObserver(TabStripModel* tab_strip_model,
                           WebContents* web_contents,
                           int number_of_loads)
      : WebContentsObserver(web_contents),
        tab_strip_model_(tab_strip_model),
        did_start_loading_(false),
        number_of_loads_(number_of_loads) {
    CHECK_NE(TabStripModel::kNoTab,
             tab_strip_model->GetIndexOfWebContents(web_contents));
    tab_strip_model_->AddObserver(this);
  }

  virtual ~NavigationOrSwapObserver() {
    tab_strip_model_->RemoveObserver(this);
  }

  void Wait() {
    loop_.Run();
  }

  // WebContentsObserver implementation:
  virtual void DidStartLoading(RenderViewHost* render_view_host) OVERRIDE {
    did_start_loading_ = true;
  }
  virtual void DidStopLoading(RenderViewHost* render_view_host) OVERRIDE {
    if (!did_start_loading_)
      return;
    number_of_loads_--;
    if (number_of_loads_ == 0)
      loop_.Quit();
  }

  // TabStripModelObserver implementation:
  virtual void TabReplacedAt(TabStripModel* tab_strip_model,
                             WebContents* old_contents,
                             WebContents* new_contents,
                             int index) OVERRIDE {
    if (old_contents != web_contents())
      return;
    // Switch to observing the new WebContents.
    Observe(new_contents);
    if (new_contents->IsLoading()) {
      // If the new WebContents is still loading, wait for it to complete. Only
      // one load post-swap is supported.
      did_start_loading_ = true;
      number_of_loads_ = 1;
    } else {
      loop_.Quit();
    }
  }

 private:
  TabStripModel* tab_strip_model_;
  bool did_start_loading_;
  int number_of_loads_;
  base::RunLoop loop_;
};

// Waits for a new tab to open and a navigation or swap in it.
class NewTabNavigationOrSwapObserver {
 public:
  NewTabNavigationOrSwapObserver()
      : new_tab_observer_(
            chrome::NOTIFICATION_TAB_ADDED,
            base::Bind(&NewTabNavigationOrSwapObserver::OnTabAdded,
                       base::Unretained(this))) {
    // Watch for NOTIFICATION_TAB_ADDED. Add a callback so that the
    // NavigationOrSwapObserver can be attached synchronously and no events are
    // missed.
  }

  void Wait() {
    new_tab_observer_.Wait();
    swap_observer_->Wait();
  }

  bool OnTabAdded(const content::NotificationSource& source,
                  const content::NotificationDetails& details) {
    if (swap_observer_)
      return true;
    WebContents* new_tab = content::Details<WebContents>(details).ptr();
    // Get the TabStripModel. Assume this is attached to a Browser.
    TabStripModel* tab_strip_model =
        static_cast<Browser*>(new_tab->GetDelegate())->tab_strip_model();
    swap_observer_.reset(new NavigationOrSwapObserver(tab_strip_model,
                                                      new_tab));
    return true;
  }

 private:
  content::WindowedNotificationObserver new_tab_observer_;
  scoped_ptr<NavigationOrSwapObserver> swap_observer_;
};

// PrerenderContents that stops the UI message loop on DidStopLoading().
class TestPrerenderContents : public PrerenderContents {
 public:
  TestPrerenderContents(
      PrerenderManager* prerender_manager,
      Profile* profile,
      const GURL& url,
      const content::Referrer& referrer,
      Origin origin,
      FinalStatus expected_final_status)
      : PrerenderContents(prerender_manager, profile, url,
                          referrer, origin, PrerenderManager::kNoExperiment),
        expected_final_status_(expected_final_status),
        new_render_view_host_(NULL),
        was_hidden_(false),
        was_shown_(false),
        should_be_shown_(expected_final_status == FINAL_STATUS_USED),
        skip_final_checks_(false) {
  }

  virtual ~TestPrerenderContents() {
    if (skip_final_checks_)
      return;

    if (expected_final_status_ == FINAL_STATUS_MAX) {
      EXPECT_EQ(MATCH_COMPLETE_REPLACEMENT, match_complete_status());
    } else {
      EXPECT_EQ(expected_final_status_, final_status()) <<
          " when testing URL " << prerender_url().path() <<
          " (Expected: " << NameFromFinalStatus(expected_final_status_) <<
          ", Actual: " << NameFromFinalStatus(final_status()) << ")";
    }
    // Prerendering RenderViewHosts should be hidden before the first
    // navigation, so this should be happen for every PrerenderContents for
    // which a RenderViewHost is created, regardless of whether or not it's
    // used.
    if (new_render_view_host_)
      EXPECT_TRUE(was_hidden_);

    // A used PrerenderContents will only be destroyed when we swap out
    // WebContents, at the end of a navigation caused by a call to
    // NavigateToURLImpl().
    if (final_status() == FINAL_STATUS_USED)
      EXPECT_TRUE(new_render_view_host_);

    EXPECT_EQ(should_be_shown_, was_shown_);
  }

  virtual void RenderProcessGone(base::TerminationStatus status) OVERRIDE {
    // On quit, it's possible to end up here when render processes are closed
    // before the PrerenderManager is destroyed.  As a result, it's possible to
    // get either FINAL_STATUS_APP_TERMINATING or FINAL_STATUS_RENDERER_CRASHED
    // on quit.
    //
    // It's also possible for this to be called after we've been notified of
    // app termination, but before we've been deleted, which is why the second
    // check is needed.
    if (expected_final_status_ == FINAL_STATUS_APP_TERMINATING &&
        final_status() != expected_final_status_) {
      expected_final_status_ = FINAL_STATUS_RENDERER_CRASHED;
    }

    PrerenderContents::RenderProcessGone(status);
  }

  virtual bool CheckURL(const GURL& url) OVERRIDE {
    // Prevent FINAL_STATUS_UNSUPPORTED_SCHEME when navigating to about:crash in
    // the PrerenderRendererCrash test.
    if (url.spec() != content::kChromeUICrashURL)
      return PrerenderContents::CheckURL(url);
    return true;
  }

  // For tests that open the prerender in a new background tab, the RenderView
  // will not have been made visible when the PrerenderContents is destroyed
  // even though it is used.
  void set_should_be_shown(bool value) { should_be_shown_ = value; }

  // For tests which do not know whether the prerender will be used.
  void set_skip_final_checks(bool value) { skip_final_checks_ = value; }

  FinalStatus expected_final_status() const { return expected_final_status_; }

 private:
  virtual void OnRenderViewHostCreated(
      RenderViewHost* new_render_view_host) OVERRIDE {
    // Used to make sure the RenderViewHost is hidden and, if used,
    // subsequently shown.
    notification_registrar().Add(
        this,
        content::NOTIFICATION_RENDER_WIDGET_VISIBILITY_CHANGED,
        content::Source<RenderWidgetHost>(new_render_view_host));

    new_render_view_host_ = new_render_view_host;

    PrerenderContents::OnRenderViewHostCreated(new_render_view_host);
  }

  virtual void Observe(int type,
                       const content::NotificationSource& source,
                       const content::NotificationDetails& details) OVERRIDE {
    if (type ==
        content::NOTIFICATION_RENDER_WIDGET_VISIBILITY_CHANGED) {
      EXPECT_EQ(new_render_view_host_,
                content::Source<RenderWidgetHost>(source).ptr());
      bool is_visible = *content::Details<bool>(details).ptr();

      if (!is_visible) {
        was_hidden_ = true;
      } else if (is_visible && was_hidden_) {
        // Once hidden, a prerendered RenderViewHost should only be shown after
        // being removed from the PrerenderContents for display.
        EXPECT_FALSE(GetRenderViewHost());
        was_shown_ = true;
      }
      return;
    }
    PrerenderContents::Observe(type, source, details);
  }

  FinalStatus expected_final_status_;

  // The RenderViewHost created for the prerender, if any.
  RenderViewHost* new_render_view_host_;
  // Set to true when the prerendering RenderWidget is hidden.
  bool was_hidden_;
  // Set to true when the prerendering RenderWidget is shown, after having been
  // hidden.
  bool was_shown_;
  // Expected final value of was_shown_.  Defaults to true for
  // FINAL_STATUS_USED, and false otherwise.
  bool should_be_shown_;
  // If true, |expected_final_status_| and other shutdown checks are skipped.
  bool skip_final_checks_;
};

// A handle to a TestPrerenderContents whose lifetime is under the caller's
// control. A PrerenderContents may be destroyed at any point. This allows
// tracking the final status, etc.
class TestPrerender : public PrerenderContents::Observer,
                      public base::SupportsWeakPtr<TestPrerender> {
 public:
  TestPrerender()
      : contents_(NULL),
        number_of_loads_(0),
        expected_number_of_loads_(0) {
  }
  virtual ~TestPrerender() {
    if (contents_)
      contents_->RemoveObserver(this);
  }

  TestPrerenderContents* contents() const { return contents_; }
  int number_of_loads() const { return number_of_loads_; }

  void WaitForCreate() { create_loop_.Run(); }
  void WaitForStart() { start_loop_.Run(); }
  void WaitForStop() { stop_loop_.Run(); }

  // Waits for |number_of_loads()| to be at least |expected_number_of_loads| OR
  // for the prerender to stop running (just to avoid a timeout if the prerender
  // dies). Note: this does not assert equality on the number of loads; the
  // caller must do it instead.
  void WaitForLoads(int expected_number_of_loads) {
    DCHECK(!load_waiter_);
    DCHECK(!expected_number_of_loads_);
    if (number_of_loads_ < expected_number_of_loads) {
      load_waiter_.reset(new base::RunLoop);
      expected_number_of_loads_ = expected_number_of_loads;
      load_waiter_->Run();
      load_waiter_.reset();
      expected_number_of_loads_ = 0;
    }
    EXPECT_LE(expected_number_of_loads, number_of_loads_);
  }

  void OnPrerenderCreated(TestPrerenderContents* contents) {
    DCHECK(!contents_);
    contents_ = contents;
    contents_->AddObserver(this);
    create_loop_.Quit();
  }

  // PrerenderContents::Observer implementation:
  virtual void OnPrerenderStart(PrerenderContents* contents) OVERRIDE {
    start_loop_.Quit();
  }

  virtual void OnPrerenderStopLoading(PrerenderContents* contents) OVERRIDE {
    number_of_loads_++;
    if (load_waiter_ && number_of_loads_ >= expected_number_of_loads_)
      load_waiter_->Quit();
  }

  virtual void OnPrerenderStop(PrerenderContents* contents) OVERRIDE {
    DCHECK(contents_);
    contents_ = NULL;
    stop_loop_.Quit();
    // If there is a WaitForLoads call and it has yet to see the expected number
    // of loads, stop the loop so the test fails instead of timing out.
    if (load_waiter_)
      load_waiter_->Quit();
  }

  virtual void OnPrerenderCreatedMatchCompleteReplacement(
      PrerenderContents* contents, PrerenderContents* replacement) OVERRIDE {
  }

 private:
  TestPrerenderContents* contents_;
  int number_of_loads_;

  int expected_number_of_loads_;
  scoped_ptr<base::RunLoop> load_waiter_;

  base::RunLoop create_loop_;
  base::RunLoop start_loop_;
  base::RunLoop stop_loop_;

  DISALLOW_COPY_AND_ASSIGN(TestPrerender);
};

// PrerenderManager that uses TestPrerenderContents.
class TestPrerenderContentsFactory : public PrerenderContents::Factory {
 public:
  TestPrerenderContentsFactory() {}

  virtual ~TestPrerenderContentsFactory() {
    EXPECT_TRUE(expected_contents_queue_.empty());
  }

  scoped_ptr<TestPrerender> ExpectPrerenderContents(FinalStatus final_status) {
    scoped_ptr<TestPrerender> handle(new TestPrerender());
    expected_contents_queue_.push_back(
        ExpectedContents(final_status, handle->AsWeakPtr()));
    return handle.Pass();
  }

  virtual PrerenderContents* CreatePrerenderContents(
      PrerenderManager* prerender_manager,
      Profile* profile,
      const GURL& url,
      const content::Referrer& referrer,
      Origin origin,
      uint8 experiment_id) OVERRIDE {
    ExpectedContents expected;
    if (!expected_contents_queue_.empty()) {
      expected = expected_contents_queue_.front();
      expected_contents_queue_.pop_front();
    }
    VLOG(1) << "Creating prerender contents for " << url.path() <<
               " with expected final status " << expected.final_status;
    VLOG(1) << expected_contents_queue_.size() << " left in the queue.";
    TestPrerenderContents* contents =
        new TestPrerenderContents(prerender_manager,
                                  profile, url, referrer, origin,
                                  expected.final_status);
    if (expected.handle)
      expected.handle->OnPrerenderCreated(contents);
    return contents;
  }

 private:
  struct ExpectedContents {
    ExpectedContents() : final_status(FINAL_STATUS_MAX) { }
    ExpectedContents(FinalStatus final_status,
                     const base::WeakPtr<TestPrerender>& handle)
        : final_status(final_status),
          handle(handle) {
    }

    FinalStatus final_status;
    base::WeakPtr<TestPrerender> handle;
  };

  std::deque<ExpectedContents> expected_contents_queue_;
};

#if defined(FULL_SAFE_BROWSING)
// A SafeBrowsingDatabaseManager implementation that returns a fixed result for
// a given URL.
class FakeSafeBrowsingDatabaseManager :  public SafeBrowsingDatabaseManager {
 public:
  explicit FakeSafeBrowsingDatabaseManager(SafeBrowsingService* service)
      : SafeBrowsingDatabaseManager(service),
        threat_type_(SB_THREAT_TYPE_SAFE) { }

  // Called on the IO thread to check if the given url is safe or not.  If we
  // can synchronously determine that the url is safe, CheckUrl returns true.
  // Otherwise it returns false, and "client" is called asynchronously with the
  // result when it is ready.
  // Returns true, indicating a SAFE result, unless the URL is the fixed URL
  // specified by the user, and the user-specified result is not SAFE
  // (in which that result will be communicated back via a call into the
  // client, and false will be returned).
  // Overrides SafeBrowsingService::CheckBrowseUrl.
  virtual bool CheckBrowseUrl(const GURL& gurl, Client* client) OVERRIDE {
    if (gurl != url_ || threat_type_ == SB_THREAT_TYPE_SAFE)
      return true;

    BrowserThread::PostTask(
        BrowserThread::IO, FROM_HERE,
        base::Bind(&FakeSafeBrowsingDatabaseManager::OnCheckBrowseURLDone,
                   this, gurl, client));
    return false;
  }

  void SetThreatTypeForUrl(const GURL& url, SBThreatType threat_type) {
    url_ = url;
    threat_type_ = threat_type;
  }

 private:
  virtual ~FakeSafeBrowsingDatabaseManager() {}

  void OnCheckBrowseURLDone(const GURL& gurl, Client* client) {
    std::vector<SBThreatType> expected_threats;
    expected_threats.push_back(SB_THREAT_TYPE_URL_MALWARE);
    expected_threats.push_back(SB_THREAT_TYPE_URL_PHISHING);
    SafeBrowsingDatabaseManager::SafeBrowsingCheck sb_check(
        std::vector<GURL>(1, gurl),
        std::vector<SBFullHash>(),
        client,
        safe_browsing_util::MALWARE,
        expected_threats);
    sb_check.url_results[0] = threat_type_;
    client->OnSafeBrowsingResult(sb_check);
  }

  GURL url_;
  SBThreatType threat_type_;
  DISALLOW_COPY_AND_ASSIGN(FakeSafeBrowsingDatabaseManager);
};

class FakeSafeBrowsingService : public SafeBrowsingService {
 public:
  FakeSafeBrowsingService() { }

  // Returned pointer has the same lifespan as the database_manager_ refcounted
  // object.
  FakeSafeBrowsingDatabaseManager* fake_database_manager() {
    return fake_database_manager_;
  }

 protected:
  virtual ~FakeSafeBrowsingService() { }

  virtual SafeBrowsingDatabaseManager* CreateDatabaseManager() OVERRIDE {
    fake_database_manager_ = new FakeSafeBrowsingDatabaseManager(this);
    return fake_database_manager_;
  }

 private:
  FakeSafeBrowsingDatabaseManager* fake_database_manager_;

  DISALLOW_COPY_AND_ASSIGN(FakeSafeBrowsingService);
};

// Factory that creates FakeSafeBrowsingService instances.
class TestSafeBrowsingServiceFactory : public SafeBrowsingServiceFactory {
 public:
  TestSafeBrowsingServiceFactory() :
      most_recent_service_(NULL) { }
  virtual ~TestSafeBrowsingServiceFactory() { }

  virtual SafeBrowsingService* CreateSafeBrowsingService() OVERRIDE {
    most_recent_service_ =  new FakeSafeBrowsingService();
    return most_recent_service_;
  }

  FakeSafeBrowsingService* most_recent_service() const {
    return most_recent_service_;
  }

 private:
  FakeSafeBrowsingService* most_recent_service_;
};
#endif

class FakeDevToolsClientHost : public DevToolsClientHost {
 public:
  FakeDevToolsClientHost() {}
  virtual ~FakeDevToolsClientHost() {}
  virtual void InspectedContentsClosing() OVERRIDE {}
  virtual void DispatchOnInspectorFrontend(const std::string& msg) OVERRIDE {}
  virtual void ReplacedWithAnotherClient() OVERRIDE {}
};

class RestorePrerenderMode {
 public:
  RestorePrerenderMode() : prev_mode_(PrerenderManager::GetMode()) {
  }

  ~RestorePrerenderMode() { PrerenderManager::SetMode(prev_mode_); }
 private:
  PrerenderManager::PrerenderManagerMode prev_mode_;
};

// URLRequestJob (and associated handler) which hangs.
class HangingURLRequestJob : public net::URLRequestJob {
 public:
  HangingURLRequestJob(net::URLRequest* request,
                          net::NetworkDelegate* network_delegate)
      : net::URLRequestJob(request, network_delegate) {
  }

  virtual void Start() OVERRIDE {}

 private:
  virtual ~HangingURLRequestJob() {}
};

class HangingFirstRequestProtocolHandler
    : public net::URLRequestJobFactory::ProtocolHandler {
 public:
  HangingFirstRequestProtocolHandler(const base::FilePath& file,
                                     base::Closure callback)
      : file_(file),
        callback_(callback),
        first_run_(true) {
  }
  virtual ~HangingFirstRequestProtocolHandler() {}

  virtual net::URLRequestJob* MaybeCreateJob(
      net::URLRequest* request,
      net::NetworkDelegate* network_delegate) const OVERRIDE {
    if (first_run_) {
      first_run_ = false;
      if (!callback_.is_null()) {
        BrowserThread::PostTask(
            BrowserThread::UI, FROM_HERE, callback_);
      }
      return new HangingURLRequestJob(request, network_delegate);
    }
    return new content::URLRequestMockHTTPJob(request, network_delegate, file_);
  }

 private:
  base::FilePath file_;
  base::Closure callback_;
  mutable bool first_run_;
};

// Makes |url| never respond on the first load, and then with the contents of
// |file| afterwards. When the first load has been scheduled, runs |callback| on
// the UI thread.
void CreateHangingFirstRequestProtocolHandlerOnIO(const GURL& url,
                                                  const base::FilePath& file,
                                                  base::Closure callback) {
  CHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
  scoped_ptr<net::URLRequestJobFactory::ProtocolHandler> never_respond_handler(
      new HangingFirstRequestProtocolHandler(file, callback));
  net::URLRequestFilter::GetInstance()->AddUrlProtocolHandler(
      url, never_respond_handler.Pass());
}

// Wrapper over URLRequestMockHTTPJob that exposes extra callbacks.
class MockHTTPJob : public content::URLRequestMockHTTPJob {
 public:
  MockHTTPJob(net::URLRequest* request,
              net::NetworkDelegate* delegate,
              const base::FilePath& file)
      : content::URLRequestMockHTTPJob(request, delegate, file) {
  }

  void set_start_callback(const base::Closure& start_callback) {
    start_callback_ = start_callback;
  }

  virtual void Start() OVERRIDE {
    if (!start_callback_.is_null())
      start_callback_.Run();
    content::URLRequestMockHTTPJob::Start();
  }

 private:
  virtual ~MockHTTPJob() {}

  base::Closure start_callback_;
};

// Dummy counter class to live on the UI thread for counting requests.
class RequestCounter : public base::SupportsWeakPtr<RequestCounter> {
 public:
  RequestCounter() : count_(0), expected_count_(-1) {}
  int count() const { return count_; }

  void RequestStarted() {
    count_++;
    if (loop_ && count_ == expected_count_)
      loop_->Quit();
  }

  void WaitForCount(int expected_count) {
    ASSERT_TRUE(!loop_);
    ASSERT_EQ(-1, expected_count_);
    if (count_ < expected_count) {
      expected_count_ = expected_count;
      loop_.reset(new base::RunLoop);
      loop_->Run();
      expected_count_ = -1;
      loop_.reset();
    }

    EXPECT_EQ(expected_count, count_);
  }
 private:
  int count_;
  int expected_count_;
  scoped_ptr<base::RunLoop> loop_;
};

// Protocol handler which counts the number of requests that start.
class CountingProtocolHandler
    : public net::URLRequestJobFactory::ProtocolHandler {
 public:
  CountingProtocolHandler(const base::FilePath& file,
                          const base::WeakPtr<RequestCounter>& counter)
      : file_(file),
        counter_(counter),
        weak_factory_(this) {
  }
  virtual ~CountingProtocolHandler() {}

  virtual net::URLRequestJob* MaybeCreateJob(
      net::URLRequest* request,
      net::NetworkDelegate* network_delegate) const OVERRIDE {
    MockHTTPJob* job = new MockHTTPJob(request, network_delegate, file_);
    job->set_start_callback(base::Bind(&CountingProtocolHandler::RequestStarted,
                                       weak_factory_.GetWeakPtr()));
    return job;
  }

  void RequestStarted() {
    BrowserThread::PostTask(
        BrowserThread::UI, FROM_HERE,
        base::Bind(&RequestCounter::RequestStarted, counter_));
  }

 private:
  base::FilePath file_;
  base::WeakPtr<RequestCounter> counter_;
  mutable base::WeakPtrFactory<CountingProtocolHandler> weak_factory_;
};

// Makes |url| respond to requests with the contents of |file|, counting the
// number that start in |counter|.
void CreateCountingProtocolHandlerOnIO(
    const GURL& url,
    const base::FilePath& file,
    const base::WeakPtr<RequestCounter>& counter) {
  CHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
  scoped_ptr<net::URLRequestJobFactory::ProtocolHandler> protocol_handler(
      new CountingProtocolHandler(file, counter));
  net::URLRequestFilter::GetInstance()->AddUrlProtocolHandler(
      url, protocol_handler.Pass());
}

// Makes |url| respond to requests with the contents of |file|.
void CreateMockProtocolHandlerOnIO(const GURL& url,
                                   const base::FilePath& file) {
  CHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
  net::URLRequestFilter::GetInstance()->AddUrlProtocolHandler(
      url, content::URLRequestMockHTTPJob::CreateProtocolHandlerForSingleFile(
          file));
}

// A ContentBrowserClient that cancels all prerenderers on OpenURL.
class TestContentBrowserClient : public chrome::ChromeContentBrowserClient {
 public:
  TestContentBrowserClient() {}
  virtual ~TestContentBrowserClient() {}

  // chrome::ChromeContentBrowserClient implementation.
  virtual bool ShouldAllowOpenURL(content::SiteInstance* site_instance,
                                  const GURL& url) OVERRIDE {
    PrerenderManagerFactory::GetForProfile(
        Profile::FromBrowserContext(site_instance->GetBrowserContext()))
        ->CancelAllPrerenders();
    return chrome::ChromeContentBrowserClient::ShouldAllowOpenURL(site_instance,
                                                                  url);
  }

 private:
  DISALLOW_COPY_AND_ASSIGN(TestContentBrowserClient);
};

// A ContentBrowserClient that forces cross-process navigations.
class SwapProcessesContentBrowserClient
    : public chrome::ChromeContentBrowserClient {
 public:
  SwapProcessesContentBrowserClient() {}
  virtual ~SwapProcessesContentBrowserClient() {}

  // chrome::ChromeContentBrowserClient implementation.
  virtual bool ShouldSwapProcessesForRedirect(
      content::ResourceContext* resource_context,
      const GURL& current_url,
      const GURL& new_url) OVERRIDE {
    return true;
  }

 private:
  DISALLOW_COPY_AND_ASSIGN(SwapProcessesContentBrowserClient);
};

// An ExternalProtocolHandler that blocks everything and asserts it never is
// called.
class NeverRunsExternalProtocolHandlerDelegate
    : public ExternalProtocolHandler::Delegate {
 public:
  // ExternalProtocolHandler::Delegate implementation.
  virtual ShellIntegration::DefaultProtocolClientWorker* CreateShellWorker(
      ShellIntegration::DefaultWebClientObserver* observer,
      const std::string& protocol) OVERRIDE {
    NOTREACHED();
    // This will crash, but it shouldn't get this far with BlockState::BLOCK
    // anyway.
    return NULL;
  }
  virtual ExternalProtocolHandler::BlockState GetBlockState(
      const std::string& scheme,
      bool initiated_by_user_gesture) OVERRIDE {
    // Block everything and fail the test.
    ADD_FAILURE();
    return ExternalProtocolHandler::BLOCK;
  }
  virtual void BlockRequest() OVERRIDE { }
  virtual void RunExternalProtocolDialog(const GURL& url,
                                         int render_process_host_id,
                                         int routing_id) OVERRIDE {
    NOTREACHED();
  }
  virtual void LaunchUrlWithoutSecurityCheck(const GURL& url) OVERRIDE {
    NOTREACHED();
  }
  virtual void FinishedProcessingCheck() OVERRIDE {
    NOTREACHED();
  }
};

base::FilePath GetTestPath(const std::string& file_name) {
  return ui_test_utils::GetTestFilePath(
      base::FilePath(FILE_PATH_LITERAL("prerender")),
      base::FilePath().AppendASCII(file_name));
}

}  // namespace

// Many of these tests are flaky. See http://crbug.com/249179
class PrerenderBrowserTest : virtual public InProcessBrowserTest {
 public:
  PrerenderBrowserTest()
      : autostart_test_server_(true),
        prerender_contents_factory_(NULL),
#if defined(FULL_SAFE_BROWSING)
        safe_browsing_factory_(new TestSafeBrowsingServiceFactory()),
#endif
        call_javascript_(true),
        check_load_events_(true),
        loader_path_("files/prerender/prerender_loader.html"),
        explicitly_set_browser_(NULL) {}

  virtual ~PrerenderBrowserTest() {}

  content::SessionStorageNamespace* GetSessionStorageNamespace() const {
    WebContents* web_contents = GetActiveWebContents();
    if (!web_contents)
      return NULL;
    return web_contents->GetController().GetDefaultSessionStorageNamespace();
  }

  virtual void SetUpInProcessBrowserTestFixture() OVERRIDE {
#if defined(FULL_SAFE_BROWSING)
    SafeBrowsingService::RegisterFactory(safe_browsing_factory_.get());
#endif
  }

  virtual void TearDownInProcessBrowserTestFixture() OVERRIDE {
#if defined(FULL_SAFE_BROWSING)
    SafeBrowsingService::RegisterFactory(NULL);
#endif
  }

  virtual void SetUpCommandLine(CommandLine* command_line) OVERRIDE {
    command_line->AppendSwitchASCII(switches::kPrerenderMode,
                                    switches::kPrerenderModeSwitchValueEnabled);
#if defined(OS_MACOSX)
    // The plugins directory isn't read by default on the Mac, so it needs to be
    // explicitly registered.
    base::FilePath app_dir;
    PathService::Get(chrome::DIR_APP, &app_dir);
    command_line->AppendSwitchPath(
        switches::kExtraPluginDir,
        app_dir.Append(FILE_PATH_LITERAL("plugins")));
#endif
    command_line->AppendSwitch(switches::kAlwaysAuthorizePlugins);
  }

  virtual void SetUpOnMainThread() OVERRIDE {
    current_browser()->profile()->GetPrefs()->SetBoolean(
        prefs::kPromptForDownload, false);
    IncreasePrerenderMemory();
    if (autostart_test_server_)
      ASSERT_TRUE(test_server()->Start());
    ChromeResourceDispatcherHostDelegate::
        SetExternalProtocolHandlerDelegateForTesting(
            &external_protocol_handler_delegate_);

    PrerenderManager* prerender_manager = GetPrerenderManager();
    ASSERT_TRUE(prerender_manager);
    prerender_manager->mutable_config().rate_limit_enabled = false;
    ASSERT_TRUE(prerender_contents_factory_ == NULL);
    prerender_contents_factory_ = new TestPrerenderContentsFactory;
    prerender_manager->SetPrerenderContentsFactory(prerender_contents_factory_);
  }

  // Convenience function to get the currently active WebContents in
  // current_browser().
  WebContents* GetActiveWebContents() const {
    return current_browser()->tab_strip_model()->GetActiveWebContents();
  }

  // Overload for a single expected final status
  scoped_ptr<TestPrerender> PrerenderTestURL(
      const std::string& html_file,
      FinalStatus expected_final_status,
      int expected_number_of_loads) {
    GURL url = test_server()->GetURL(html_file);
    return PrerenderTestURL(url,
                            expected_final_status,
                            expected_number_of_loads);
  }

  ScopedVector<TestPrerender> PrerenderTestURL(
      const std::string& html_file,
      const std::vector<FinalStatus>& expected_final_status_queue,
      int expected_number_of_loads) {
    GURL url = test_server()->GetURL(html_file);
    return PrerenderTestURLImpl(url,
                                expected_final_status_queue,
                                expected_number_of_loads);
  }

  scoped_ptr<TestPrerender> PrerenderTestURL(
      const GURL& url,
      FinalStatus expected_final_status,
      int expected_number_of_loads) {
    std::vector<FinalStatus> expected_final_status_queue(
        1, expected_final_status);
    std::vector<TestPrerender*> prerenders;
    PrerenderTestURLImpl(url,
                         expected_final_status_queue,
                         expected_number_of_loads).release(&prerenders);
    CHECK_EQ(1u, prerenders.size());
    return scoped_ptr<TestPrerender>(prerenders[0]);
  }

  void NavigateToDestURL() const {
    NavigateToDestURLWithDisposition(CURRENT_TAB, true);
  }

  // Opens the url in a new tab, with no opener.
  void NavigateToDestURLWithDisposition(
      WindowOpenDisposition disposition,
      bool expect_swap_to_succeed) const {
    NavigateToURLWithParams(
        content::OpenURLParams(dest_url_, Referrer(), disposition,
                               content::PAGE_TRANSITION_TYPED, false),
        expect_swap_to_succeed);
  }

  void NavigateToURL(const std::string& dest_html_file) const {
    NavigateToURLWithDisposition(dest_html_file, CURRENT_TAB, true);
  }

  void NavigateToURLWithDisposition(const std::string& dest_html_file,
                                    WindowOpenDisposition disposition,
                                    bool expect_swap_to_succeed) const {
    GURL dest_url = test_server()->GetURL(dest_html_file);
    NavigateToURLWithDisposition(dest_url, disposition, expect_swap_to_succeed);
  }

  void NavigateToURLWithDisposition(const GURL& dest_url,
                                    WindowOpenDisposition disposition,
                                    bool expect_swap_to_succeed) const {
    NavigateToURLWithParams(
        content::OpenURLParams(dest_url, Referrer(), disposition,
                               content::PAGE_TRANSITION_TYPED, false),
        expect_swap_to_succeed);
  }

  void NavigateToURLWithParams(const content::OpenURLParams& params,
                               bool expect_swap_to_succeed) const {
    NavigateToURLImpl(params, expect_swap_to_succeed);
  }

  void OpenDestURLViaClick() const {
    OpenURLViaClick(dest_url_);
  }

  void OpenURLViaClick(const GURL& url) const {
    OpenURLWithJSImpl("Click", url, GURL(), false);
  }

  void OpenDestURLViaClickTarget() const {
    OpenURLWithJSImpl("ClickTarget", dest_url_, GURL(), true);
  }

  void OpenDestURLViaClickPing(const GURL& ping_url) const {
    OpenURLWithJSImpl("ClickPing", dest_url_, ping_url, false);
  }

  void OpenDestURLViaClickNewWindow() const {
    OpenURLWithJSImpl("ShiftClick", dest_url_, GURL(), true);
  }

  void OpenDestURLViaClickNewForegroundTab() const {
#if defined(OS_MACOSX)
    OpenURLWithJSImpl("MetaShiftClick", dest_url_, GURL(), true);
#else
    OpenURLWithJSImpl("CtrlShiftClick", dest_url_, GURL(), true);
#endif
  }

  void OpenDestURLViaClickNewBackgroundTab() const {
#if defined(OS_MACOSX)
    OpenURLWithJSImpl("MetaClick", dest_url_, GURL(), true);
#else
    OpenURLWithJSImpl("CtrlClick", dest_url_, GURL(), true);
#endif
  }

  void OpenDestURLViaWindowOpen() const {
    OpenURLWithJSImpl("WindowOpen", dest_url_, GURL(), true);
  }

  void RemoveLinkElement(int i) const {
    GetActiveWebContents()->GetMainFrame()->ExecuteJavaScript(
        base::ASCIIToUTF16(base::StringPrintf("RemoveLinkElement(%d)", i)));
  }

  void ClickToNextPageAfterPrerender() {
    TestNavigationObserver nav_observer(GetActiveWebContents());
    RenderFrameHost* render_frame_host = GetActiveWebContents()->GetMainFrame();
    render_frame_host->ExecuteJavaScript(base::ASCIIToUTF16("ClickOpenLink()"));
    nav_observer.Wait();
  }

  void NavigateToNextPageAfterPrerender() const {
    ui_test_utils::NavigateToURL(
        current_browser(),
        test_server()->GetURL("files/prerender/prerender_page.html"));
  }

  // Called after the prerendered page has been navigated to and then away from.
  // Navigates back through the history to the prerendered page.
  void GoBackToPrerender() {
    TestNavigationObserver back_nav_observer(GetActiveWebContents());
    chrome::GoBack(current_browser(), CURRENT_TAB);
    back_nav_observer.Wait();
    bool original_prerender_page = false;
    ASSERT_TRUE(content::ExecuteScriptAndExtractBool(
        GetActiveWebContents(),
        "window.domAutomationController.send(IsOriginalPrerenderPage())",
        &original_prerender_page));
    EXPECT_TRUE(original_prerender_page);
  }

  // Goes back to the page that was active before the prerender was swapped
  // in. This must be called when the prerendered page is the current page
  // in the active tab.
  void GoBackToPageBeforePrerender() {
    WebContents* tab = GetActiveWebContents();
    ASSERT_TRUE(tab);
    EXPECT_FALSE(tab->IsLoading());
    TestNavigationObserver back_nav_observer(tab);
    chrome::GoBack(current_browser(), CURRENT_TAB);
    back_nav_observer.Wait();
    bool js_result;
    ASSERT_TRUE(content::ExecuteScriptAndExtractBool(
        tab,
        "window.domAutomationController.send(DidBackToOriginalPagePass())",
        &js_result));
    EXPECT_TRUE(js_result);
  }

  bool UrlIsInPrerenderManager(const std::string& html_file) const {
    return UrlIsInPrerenderManager(test_server()->GetURL(html_file));
  }

  bool UrlIsInPrerenderManager(const GURL& url) const {
    return GetPrerenderManager()->FindPrerenderData(
        url, GetSessionStorageNamespace()) != NULL;
  }

  void UseHttpsSrcServer() {
    if (https_src_server_)
      return;
    https_src_server_.reset(
        new net::SpawnedTestServer(
            net::SpawnedTestServer::TYPE_HTTPS,
            net::SpawnedTestServer::kLocalhost,
            base::FilePath(FILE_PATH_LITERAL("chrome/test/data"))));
    CHECK(https_src_server_->Start());
  }

  void DisableJavascriptCalls() {
    call_javascript_ = false;
  }

  void DisableLoadEventCheck() {
    check_load_events_ = false;
  }

  TaskManagerModel* GetModel() const {
    return TaskManager::GetInstance()->model();
  }

  PrerenderManager* GetPrerenderManager() const {
    PrerenderManager* prerender_manager =
        PrerenderManagerFactory::GetForProfile(current_browser()->profile());
    return prerender_manager;
  }

  const PrerenderLinkManager* GetPrerenderLinkManager() const {
    PrerenderLinkManager* prerender_link_manager =
        PrerenderLinkManagerFactory::GetForProfile(
            current_browser()->profile());
    return prerender_link_manager;
  }

  int GetPrerenderEventCount(int index, const std::string& type) const {
    int event_count;
    std::string expression = base::StringPrintf(
        "window.domAutomationController.send("
        "    GetPrerenderEventCount(%d, '%s'))", index, type.c_str());

    CHECK(content::ExecuteScriptAndExtractInt(
        GetActiveWebContents(), expression, &event_count));
    return event_count;
  }

  bool DidReceivePrerenderStartEventForLinkNumber(int index) const {
    return GetPrerenderEventCount(index, "webkitprerenderstart") > 0;
  }

  int GetPrerenderLoadEventCountForLinkNumber(int index) const {
    return GetPrerenderEventCount(index, "webkitprerenderload");
  }

  int GetPrerenderDomContentLoadedEventCountForLinkNumber(int index) const {
    return GetPrerenderEventCount(index, "webkitprerenderdomcontentloaded");
  }

  bool DidReceivePrerenderStopEventForLinkNumber(int index) const {
    return GetPrerenderEventCount(index, "webkitprerenderstop") > 0;
  }

  void WaitForPrerenderEventCount(int index,
                                  const std::string& type,
                                  int count) const {
    int dummy;
    std::string expression = base::StringPrintf(
        "WaitForPrerenderEventCount(%d, '%s', %d,"
        "    window.domAutomationController.send.bind("
        "        window.domAutomationController, 0))",
        index, type.c_str(), count);

    CHECK(content::ExecuteScriptAndExtractInt(
        GetActiveWebContents(), expression, &dummy));
    CHECK_EQ(0, dummy);
  }

  bool HadPrerenderEventErrors() const {
    bool had_prerender_event_errors;
    CHECK(content::ExecuteScriptAndExtractBool(
        GetActiveWebContents(),
        "window.domAutomationController.send(Boolean("
        "    hadPrerenderEventErrors))",
        &had_prerender_event_errors));
    return had_prerender_event_errors;
  }

  // Asserting on this can result in flaky tests.  PrerenderHandles are
  // removed from the PrerenderLinkManager when the prerender is canceled from
  // the browser, when the prerenders are cancelled from the renderer process,
  // or the channel for the renderer process is closed on the IO thread.  In the
  // last case, the code must be careful to wait for the channel to close, as it
  // is done asynchronously after swapping out the old process.  See
  // ChannelDestructionWatcher.
  bool IsEmptyPrerenderLinkManager() const {
    return GetPrerenderLinkManager()->IsEmpty();
  }

  size_t GetLinkPrerenderCount() const {
    return GetPrerenderLinkManager()->prerenders_.size();
  }

  size_t GetRunningLinkPrerenderCount() const {
    return GetPrerenderLinkManager()->CountRunningPrerenders();
  }

  // Returns length of |prerender_manager_|'s history, or -1 on failure.
  int GetHistoryLength() const {
    scoped_ptr<base::DictionaryValue> prerender_dict(
        static_cast<base::DictionaryValue*>(
            GetPrerenderManager()->GetAsValue()));
    if (!prerender_dict.get())
      return -1;
    base::ListValue* history_list;
    if (!prerender_dict->GetList("history", &history_list))
      return -1;
    return static_cast<int>(history_list->GetSize());
  }

#if defined(FULL_SAFE_BROWSING)
  FakeSafeBrowsingDatabaseManager* GetFakeSafeBrowsingDatabaseManager() {
    return safe_browsing_factory_->most_recent_service()->
        fake_database_manager();
  }
#endif

  TestPrerenderContents* GetPrerenderContentsFor(const GURL& url) const {
    PrerenderManager::PrerenderData* prerender_data =
        GetPrerenderManager()->FindPrerenderData(url, NULL);
    return static_cast<TestPrerenderContents*>(
        prerender_data ? prerender_data->contents() : NULL);
  }

  void SetLoaderHostOverride(const std::string& host) {
    loader_host_override_ = host;
    host_resolver()->AddRule(host, "127.0.0.1");
  }

  void set_loader_path(const std::string& path) {
    loader_path_ = path;
  }

  void set_loader_query(const std::string& query) {
    loader_query_ = query;
  }

  GURL GetCrossDomainTestUrl(const std::string& path) {
    static const std::string secondary_domain = "www.foo.com";
    host_resolver()->AddRule(secondary_domain, "127.0.0.1");
    std::string url_str(base::StringPrintf(
        "http://%s:%d/%s",
        secondary_domain.c_str(),
        test_server()->host_port_pair().port(),
        path.c_str()));
    return GURL(url_str);
  }

  void set_browser(Browser* browser) {
    explicitly_set_browser_ = browser;
  }

  Browser* current_browser() const {
    return explicitly_set_browser_ ? explicitly_set_browser_ : browser();
  }

  const GURL& dest_url() const {
    return dest_url_;
  }

  void IncreasePrerenderMemory() {
    // Increase the memory allowed in a prerendered page above normal settings.
    // Debug build bots occasionally run against the default limit, and tests
    // were failing because the prerender was canceled due to memory exhaustion.
    // http://crbug.com/93076
    GetPrerenderManager()->mutable_config().max_bytes = 1000 * 1024 * 1024;
  }

  bool DidPrerenderPass(WebContents* web_contents) const {
    bool prerender_test_result = false;
    if (!content::ExecuteScriptAndExtractBool(
            web_contents,
            "window.domAutomationController.send(DidPrerenderPass())",
            &prerender_test_result))
      return false;
    return prerender_test_result;
  }

  bool DidDisplayPass(WebContents* web_contents) const {
    bool display_test_result = false;
    if (!content::ExecuteScriptAndExtractBool(
            web_contents,
            "window.domAutomationController.send(DidDisplayPass())",
            &display_test_result))
      return false;
    return display_test_result;
  }

  scoped_ptr<TestPrerender> ExpectPrerender(FinalStatus expected_final_status) {
    return prerender_contents_factory_->ExpectPrerenderContents(
        expected_final_status);
  }

  void AddPrerender(const GURL& url, int index) {
    std::string javascript = base::StringPrintf(
        "AddPrerender('%s', %d)", url.spec().c_str(), index);
    RenderFrameHost* render_frame_host = GetActiveWebContents()->GetMainFrame();
    render_frame_host->ExecuteJavaScript(base::ASCIIToUTF16(javascript));
  }

  // Returns a string for pattern-matching TaskManager tab entries.
  base::string16 MatchTaskManagerTab(const char* page_title) {
    return l10n_util::GetStringFUTF16(IDS_TASK_MANAGER_TAB_PREFIX,
                                      base::ASCIIToUTF16(page_title));
  }

  // Returns a string for pattern-matching TaskManager prerender entries.
  base::string16 MatchTaskManagerPrerender(const char* page_title) {
    return l10n_util::GetStringFUTF16(IDS_TASK_MANAGER_PRERENDER_PREFIX,
                                      base::ASCIIToUTF16(page_title));
  }

 protected:
  bool autostart_test_server_;

 private:
  // TODO(davidben): Remove this altogether so the tests don't globally assume
  // only one prerender.
  TestPrerenderContents* GetPrerenderContents() const {
    return GetPrerenderContentsFor(dest_url_);
  }

  ScopedVector<TestPrerender> PrerenderTestURLImpl(
      const GURL& prerender_url,
      const std::vector<FinalStatus>& expected_final_status_queue,
      int expected_number_of_loads) {
    dest_url_ = prerender_url;

    std::vector<net::SpawnedTestServer::StringPair> replacement_text;
    replacement_text.push_back(
        make_pair("REPLACE_WITH_PRERENDER_URL", prerender_url.spec()));
    std::string replacement_path;
    CHECK(net::SpawnedTestServer::GetFilePathWithReplacements(
        loader_path_,
        replacement_text,
        &replacement_path));

    const net::SpawnedTestServer* src_server = test_server();
    if (https_src_server_)
      src_server = https_src_server_.get();
    GURL loader_url = src_server->GetURL(
        replacement_path + "&" + loader_query_);

    GURL::Replacements loader_replacements;
    if (!loader_host_override_.empty())
      loader_replacements.SetHostStr(loader_host_override_);
    loader_url = loader_url.ReplaceComponents(loader_replacements);

    VLOG(1) << "Running test with queue length " <<
               expected_final_status_queue.size();
    CHECK(!expected_final_status_queue.empty());
    ScopedVector<TestPrerender> prerenders;
    for (size_t i = 0; i < expected_final_status_queue.size(); i++) {
      prerenders.push_back(
          prerender_contents_factory_->ExpectPrerenderContents(
              expected_final_status_queue[i]).release());
    }

    FinalStatus expected_final_status = expected_final_status_queue.front();

    // Navigate to the loader URL and then wait for the first prerender to be
    // created.
    ui_test_utils::NavigateToURL(current_browser(), loader_url);
    prerenders[0]->WaitForCreate();
    prerenders[0]->WaitForLoads(expected_number_of_loads);

    if (ShouldAbortPrerenderBeforeSwap(expected_final_status)) {
      // The prerender will abort on its own. Assert it does so correctly.
      prerenders[0]->WaitForStop();
      EXPECT_FALSE(prerenders[0]->contents());
      EXPECT_TRUE(DidReceivePrerenderStopEventForLinkNumber(0));
    } else {
      // Otherwise, check that it prerendered correctly.
      TestPrerenderContents* prerender_contents = prerenders[0]->contents();

      CHECK_NE(static_cast<PrerenderContents*>(NULL), prerender_contents);
      EXPECT_EQ(FINAL_STATUS_MAX, prerender_contents->final_status());
      EXPECT_FALSE(DidReceivePrerenderStopEventForLinkNumber(0));

      if (call_javascript_) {
        // Check if page behaves as expected while in prerendered state.
        EXPECT_TRUE(DidPrerenderPass(prerender_contents->prerender_contents()));
      }
    }

    // Test that the referring page received the right start and load events.
    EXPECT_TRUE(DidReceivePrerenderStartEventForLinkNumber(0));
    if (check_load_events_) {
      EXPECT_EQ(expected_number_of_loads, prerenders[0]->number_of_loads());
      EXPECT_EQ(expected_number_of_loads,
                GetPrerenderLoadEventCountForLinkNumber(0));
    }
    EXPECT_FALSE(HadPrerenderEventErrors());

    return prerenders.Pass();
  }

  void NavigateToURLImpl(const content::OpenURLParams& params,
                         bool expect_swap_to_succeed) const {
    ASSERT_NE(static_cast<PrerenderManager*>(NULL), GetPrerenderManager());
    // Make sure in navigating we have a URL to use in the PrerenderManager.
    ASSERT_NE(static_cast<PrerenderContents*>(NULL), GetPrerenderContents());

    WebContents* web_contents = GetPrerenderContents()->prerender_contents();

    // Navigate and wait for either the load to finish normally or for a swap to
    // occur.
    // TODO(davidben): The only handles CURRENT_TAB navigations, which is the
    // only case tested or prerendered right now.
    CHECK_EQ(CURRENT_TAB, params.disposition);
    NavigationOrSwapObserver swap_observer(current_browser()->tab_strip_model(),
                                           GetActiveWebContents());
    WebContents* target_web_contents = current_browser()->OpenURL(params);
    swap_observer.Wait();

    if (web_contents && expect_swap_to_succeed) {
      EXPECT_EQ(web_contents, target_web_contents);
      if (call_javascript_)
        EXPECT_TRUE(DidDisplayPass(web_contents));
    }
  }

  // Opens the prerendered page using javascript functions in the loader
  // page. |javascript_function_name| should be a 0 argument function which is
  // invoked. |new_web_contents| is true if the navigation is expected to
  // happen in a new WebContents via OpenURL.
  void OpenURLWithJSImpl(const std::string& javascript_function_name,
                         const GURL& url,
                         const GURL& ping_url,
                         bool new_web_contents) const {
    WebContents* web_contents = GetActiveWebContents();
    RenderFrameHost* render_frame_host = web_contents->GetMainFrame();
    // Extra arguments in JS are ignored.
    std::string javascript = base::StringPrintf(
        "%s('%s', '%s')", javascript_function_name.c_str(),
        url.spec().c_str(), ping_url.spec().c_str());

    if (new_web_contents) {
      NewTabNavigationOrSwapObserver observer;
      render_frame_host->ExecuteJavaScript(base::ASCIIToUTF16(javascript));
      observer.Wait();
    } else {
      NavigationOrSwapObserver observer(current_browser()->tab_strip_model(),
                                        web_contents);
      render_frame_host->ExecuteJavaScript(base::ASCIIToUTF16(javascript));
      observer.Wait();
    }
  }

  TestPrerenderContentsFactory* prerender_contents_factory_;
#if defined(FULL_SAFE_BROWSING)
  scoped_ptr<TestSafeBrowsingServiceFactory> safe_browsing_factory_;
#endif
  NeverRunsExternalProtocolHandlerDelegate external_protocol_handler_delegate_;
  GURL dest_url_;
  scoped_ptr<net::SpawnedTestServer> https_src_server_;
  bool call_javascript_;
  bool check_load_events_;
  std::string loader_host_override_;
  std::string loader_path_;
  std::string loader_query_;
  Browser* explicitly_set_browser_;
};

// Checks that a page is correctly prerendered in the case of a
// <link rel=prerender> tag and then loaded into a tab in response to a
// navigation.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderPage) {
  UMAHistogramHelper histograms;

  PrerenderTestURL("files/prerender/prerender_page.html", FINAL_STATUS_USED, 1);
  EXPECT_EQ(1, GetPrerenderDomContentLoadedEventCountForLinkNumber(0));
  histograms.Fetch();
  histograms.ExpectTotalCount("Prerender.none_PerceivedPLT", 1);
  histograms.ExpectTotalCount("Prerender.none_PerceivedPLTMatched", 0);
  histograms.ExpectTotalCount("Prerender.none_PerceivedPLTMatchedComplete", 0);
  histograms.ExpectTotalCount("Prerender.websame_PrerenderNotSwappedInPLT", 1);

  ChannelDestructionWatcher channel_close_watcher;
  channel_close_watcher.WatchChannel(
      GetActiveWebContents()->GetRenderProcessHost());
  NavigateToDestURL();
  channel_close_watcher.WaitForChannelClose();

  histograms.Fetch();
  histograms.ExpectTotalCount("Prerender.websame_PerceivedPLT", 1);
  histograms.ExpectTotalCount("Prerender.websame_PerceivedPLTMatched", 1);
  histograms.ExpectTotalCount(
      "Prerender.websame_PerceivedPLTMatchedComplete", 1);

  ASSERT_TRUE(IsEmptyPrerenderLinkManager());
}

// Checks that cross-domain prerenders emit the correct histograms.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderPageCrossDomain) {
  UMAHistogramHelper histograms;

  PrerenderTestURL(GetCrossDomainTestUrl("files/prerender/prerender_page.html"),
                   FINAL_STATUS_USED, 1);
  histograms.Fetch();
  histograms.ExpectTotalCount("Prerender.none_PerceivedPLT", 1);
  histograms.ExpectTotalCount("Prerender.none_PerceivedPLTMatched", 0);
  histograms.ExpectTotalCount("Prerender.none_PerceivedPLTMatchedComplete", 0);
  histograms.ExpectTotalCount("Prerender.webcross_PrerenderNotSwappedInPLT", 1);

  NavigateToDestURL();
  histograms.Fetch();
  histograms.ExpectTotalCount("Prerender.webcross_PerceivedPLT", 1);
  histograms.ExpectTotalCount("Prerender.webcross_PerceivedPLTMatched", 1);
  histograms.ExpectTotalCount(
      "Prerender.webcross_PerceivedPLTMatchedComplete", 1);
}

// Checks that pending prerenders launch and receive proper event treatment.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderPagePending) {
  scoped_ptr<TestPrerender> prerender =
      PrerenderTestURL("files/prerender/prerender_page_pending.html",
                       FINAL_STATUS_USED, 1);

  // Navigate to the prerender.
  scoped_ptr<TestPrerender> prerender2 = ExpectPrerender(FINAL_STATUS_USED);
  NavigateToDestURL();
  // Abort early if the original prerender didn't swap, so as not to hang.
  ASSERT_FALSE(prerender->contents());

  // Wait for the new prerender to be ready.
  prerender2->WaitForStart();
  prerender2->WaitForLoads(1);

  const GURL prerender_page_url =
      test_server()->GetURL("files/prerender/prerender_page.html");
  EXPECT_FALSE(IsEmptyPrerenderLinkManager());
  EXPECT_NE(static_cast<TestPrerenderContents*>(NULL),
            GetPrerenderContentsFor(prerender_page_url));

  // Now navigate to our target page.
  NavigationOrSwapObserver swap_observer(current_browser()->tab_strip_model(),
                                         GetActiveWebContents());
  ui_test_utils::NavigateToURLWithDisposition(
      current_browser(), prerender_page_url, CURRENT_TAB,
      ui_test_utils::BROWSER_TEST_NONE);
  swap_observer.Wait();

  EXPECT_TRUE(IsEmptyPrerenderLinkManager());
}

// Checks that pending prerenders which are canceled before they are launched
// never get started.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderPageRemovesPending) {
  PrerenderTestURL("files/prerender/prerender_page_removes_pending.html",
                   FINAL_STATUS_USED, 1);

  ChannelDestructionWatcher channel_close_watcher;
  channel_close_watcher.WatchChannel(
      GetActiveWebContents()->GetRenderProcessHost());
  NavigateToDestURL();
  channel_close_watcher.WaitForChannelClose();

  EXPECT_FALSE(DidReceivePrerenderStartEventForLinkNumber(1));
  EXPECT_FALSE(DidReceivePrerenderStopEventForLinkNumber(1));
  EXPECT_FALSE(HadPrerenderEventErrors());
  // IsEmptyPrerenderLinkManager() is not racy because the earlier DidReceive*
  // calls did a thread/process hop to the renderer which insured pending
  // renderer events have arrived.
  ASSERT_TRUE(IsEmptyPrerenderLinkManager());
}

IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderPageRemovingLink) {
  scoped_ptr<TestPrerender> prerender =
      PrerenderTestURL("files/prerender/prerender_page.html",
                       FINAL_STATUS_CANCELLED, 1);

  // No ChannelDestructionWatcher is needed here, since prerenders in the
  // PrerenderLinkManager should be deleted by removing the links, rather than
  // shutting down the renderer process.
  RemoveLinkElement(0);
  prerender->WaitForStop();

  EXPECT_TRUE(DidReceivePrerenderStartEventForLinkNumber(0));
  EXPECT_FALSE(DidReceivePrerenderStopEventForLinkNumber(0));
  EXPECT_FALSE(HadPrerenderEventErrors());
  // IsEmptyPrerenderLinkManager() is not racy because the earlier DidReceive*
  // calls did a thread/process hop to the renderer which insured pending
  // renderer events have arrived.
  EXPECT_TRUE(IsEmptyPrerenderLinkManager());
}

IN_PROC_BROWSER_TEST_F(
    PrerenderBrowserTest, PrerenderPageRemovingLinkWithTwoLinks) {
  GetPrerenderManager()->mutable_config().max_link_concurrency = 2;
  GetPrerenderManager()->mutable_config().max_link_concurrency_per_launcher = 2;

  set_loader_query("links_to_insert=2");
  scoped_ptr<TestPrerender> prerender =
      PrerenderTestURL("files/prerender/prerender_page.html",
                       FINAL_STATUS_CANCELLED, 1);
  EXPECT_TRUE(DidReceivePrerenderStartEventForLinkNumber(0));
  EXPECT_FALSE(DidReceivePrerenderStopEventForLinkNumber(0));
  EXPECT_TRUE(DidReceivePrerenderStartEventForLinkNumber(1));
  EXPECT_FALSE(DidReceivePrerenderStopEventForLinkNumber(1));

  RemoveLinkElement(0);
  RemoveLinkElement(1);
  prerender->WaitForStop();

  EXPECT_TRUE(DidReceivePrerenderStartEventForLinkNumber(0));
  EXPECT_FALSE(DidReceivePrerenderStopEventForLinkNumber(0));
  EXPECT_TRUE(DidReceivePrerenderStartEventForLinkNumber(1));
  EXPECT_FALSE(DidReceivePrerenderStopEventForLinkNumber(1));
  EXPECT_FALSE(HadPrerenderEventErrors());
  // IsEmptyPrerenderLinkManager() is not racy because the earlier DidReceive*
  // calls did a thread/process hop to the renderer which insured pending
  // renderer events have arrived.
  EXPECT_TRUE(IsEmptyPrerenderLinkManager());
}

IN_PROC_BROWSER_TEST_F(
    PrerenderBrowserTest, PrerenderPageRemovingLinkWithTwoLinksOneLate) {
  GetPrerenderManager()->mutable_config().max_link_concurrency = 2;
  GetPrerenderManager()->mutable_config().max_link_concurrency_per_launcher = 2;

  GURL url = test_server()->GetURL("files/prerender/prerender_page.html");
  scoped_ptr<TestPrerender> prerender =
      PrerenderTestURL(url, FINAL_STATUS_CANCELLED, 1);

  // Add a second prerender for the same link. It reuses the prerender, so only
  // the start event fires here.
  AddPrerender(url, 1);
  WaitForPrerenderEventCount(1, "webkitprerenderstart", 1);
  EXPECT_TRUE(DidReceivePrerenderStartEventForLinkNumber(1));
  EXPECT_EQ(0, GetPrerenderLoadEventCountForLinkNumber(1));
  EXPECT_FALSE(DidReceivePrerenderStopEventForLinkNumber(1));

  RemoveLinkElement(0);
  RemoveLinkElement(1);
  prerender->WaitForStop();

  EXPECT_TRUE(DidReceivePrerenderStartEventForLinkNumber(0));
  EXPECT_FALSE(DidReceivePrerenderStopEventForLinkNumber(0));
  EXPECT_TRUE(DidReceivePrerenderStartEventForLinkNumber(1));
  EXPECT_FALSE(DidReceivePrerenderStopEventForLinkNumber(1));
  EXPECT_FALSE(HadPrerenderEventErrors());
  // IsEmptyPrerenderLinkManager() is not racy because the earlier DidReceive*
  // calls did a thread/process hop to the renderer which insured pending
  // renderer events have arrived.
  EXPECT_TRUE(IsEmptyPrerenderLinkManager());
}

IN_PROC_BROWSER_TEST_F(
    PrerenderBrowserTest,
    PrerenderPageRemovingLinkWithTwoLinksRemovingOne) {
  GetPrerenderManager()->mutable_config().max_link_concurrency = 2;
  GetPrerenderManager()->mutable_config().max_link_concurrency_per_launcher = 2;
  set_loader_query("links_to_insert=2");
  PrerenderTestURL("files/prerender/prerender_page.html",
                   FINAL_STATUS_USED, 1);
  EXPECT_TRUE(DidReceivePrerenderStartEventForLinkNumber(0));
  EXPECT_FALSE(DidReceivePrerenderStopEventForLinkNumber(0));
  EXPECT_TRUE(DidReceivePrerenderStartEventForLinkNumber(1));
  EXPECT_FALSE(DidReceivePrerenderStopEventForLinkNumber(1));

  RemoveLinkElement(0);
  EXPECT_TRUE(DidReceivePrerenderStartEventForLinkNumber(0));
  EXPECT_FALSE(DidReceivePrerenderStopEventForLinkNumber(0));
  EXPECT_TRUE(DidReceivePrerenderStartEventForLinkNumber(1));
  EXPECT_FALSE(DidReceivePrerenderStopEventForLinkNumber(1));
  EXPECT_FALSE(HadPrerenderEventErrors());
  // IsEmptyPrerenderLinkManager() is not racy because the earlier DidReceive*
  // calls did a thread/process hop to the renderer which insured pending
  // renderer events have arrived.
  EXPECT_FALSE(IsEmptyPrerenderLinkManager());

  ChannelDestructionWatcher channel_close_watcher;
  channel_close_watcher.WatchChannel(
      GetActiveWebContents()->GetRenderProcessHost());
  NavigateToDestURL();
  channel_close_watcher.WaitForChannelClose();

  EXPECT_TRUE(IsEmptyPrerenderLinkManager());
}

// Checks that the visibility API works.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderVisibility) {
  PrerenderTestURL("files/prerender/prerender_visibility.html",
                   FINAL_STATUS_USED,
                   1);
  NavigateToDestURL();
}

// Checks that the prerendering of a page is canceled correctly if we try to
// swap it in before it commits.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderNoCommitNoSwap) {
  // Navigate to a page that triggers a prerender for a URL that never commits.
  const GURL kNoCommitUrl("http://never-respond.example.com");
  base::FilePath file(GetTestPath("prerender_page.html"));

  base::RunLoop prerender_start_loop;
  BrowserThread::PostTask(
      BrowserThread::IO, FROM_HERE,
      base::Bind(&CreateHangingFirstRequestProtocolHandlerOnIO,
                 kNoCommitUrl, file, prerender_start_loop.QuitClosure()));
  DisableJavascriptCalls();
  PrerenderTestURL(kNoCommitUrl,
                   FINAL_STATUS_NAVIGATION_UNCOMMITTED,
                   0);
  // Wait for the hanging request to be scheduled.
  prerender_start_loop.Run();

  // Navigate to the URL, but assume the contents won't be swapped in.
  NavigateToDestURLWithDisposition(CURRENT_TAB, false);
}

// Checks that client redirects don't add alias URLs until after they commit.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderNoCommitNoSwap2) {
  // Navigate to a page that then navigates to a URL that never commits.
  const GURL kNoCommitUrl("http://never-respond.example.com");
  base::FilePath file(GetTestPath("prerender_page.html"));

  base::RunLoop prerender_start_loop;
  BrowserThread::PostTask(
      BrowserThread::IO, FROM_HERE,
      base::Bind(&CreateHangingFirstRequestProtocolHandlerOnIO,
                 kNoCommitUrl, file, prerender_start_loop.QuitClosure()));
  DisableJavascriptCalls();
  PrerenderTestURL(CreateClientRedirect(kNoCommitUrl.spec()),
                   FINAL_STATUS_APP_TERMINATING, 1);
  // Wait for the hanging request to be scheduled.
  prerender_start_loop.Run();

  // Navigating to the second URL should not swap.
  NavigateToURLWithDisposition(kNoCommitUrl, CURRENT_TAB, false);
}

// Checks that the prerendering of a page is canceled correctly when a
// Javascript alert is called.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderAlertBeforeOnload) {
  PrerenderTestURL("files/prerender/prerender_alert_before_onload.html",
                   FINAL_STATUS_JAVASCRIPT_ALERT,
                   0);
}

// Checks that the prerendering of a page is canceled correctly when a
// Javascript alert is called.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderAlertAfterOnload) {
  PrerenderTestURL("files/prerender/prerender_alert_after_onload.html",
                   FINAL_STATUS_JAVASCRIPT_ALERT,
                   1);
}

// Checks that plugins are not loaded while a page is being preloaded, but
// are loaded when the page is displayed.
#if defined(USE_AURA) && !defined(OS_WIN)
// http://crbug.com/103496
#define MAYBE_PrerenderDelayLoadPlugin DISABLED_PrerenderDelayLoadPlugin
#elif defined(OS_MACOSX)
// http://crbug.com/100514
#define MAYBE_PrerenderDelayLoadPlugin DISABLED_PrerenderDelayLoadPlugin
#elif defined(OS_WIN) && defined(ARCH_CPU_X86_64)
// TODO(jschuh): Failing plugin tests. crbug.com/244653
#define MAYBE_PrerenderDelayLoadPlugin DISABLED_PrerenderDelayLoadPlugin
#elif defined(OS_LINUX)
// http://crbug.com/306715
#define MAYBE_PrerenderDelayLoadPlugin DISABLED_PrerenderDelayLoadPlugin
#else
#define MAYBE_PrerenderDelayLoadPlugin PrerenderDelayLoadPlugin
#endif
// http://crbug.com/306715
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, MAYBE_PrerenderDelayLoadPlugin) {
  PrerenderTestURL("files/prerender/plugin_delay_load.html",
                   FINAL_STATUS_USED,
                   1);
  NavigateToDestURL();
}

// Checks that plugins are not loaded on prerendering pages when click-to-play
// is enabled.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderClickToPlay) {
  // Enable click-to-play.
  HostContentSettingsMap* content_settings_map =
      current_browser()->profile()->GetHostContentSettingsMap();
  content_settings_map->SetDefaultContentSetting(
      CONTENT_SETTINGS_TYPE_PLUGINS, CONTENT_SETTING_ASK);

  PrerenderTestURL("files/prerender/prerender_plugin_click_to_play.html",
                   FINAL_STATUS_USED,
                   1);
  NavigateToDestURL();
}

// Checks that we don't load a NaCl plugin when NaCl is disabled.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderNaClPluginDisabled) {
  PrerenderTestURL("files/prerender/prerender_plugin_nacl_disabled.html",
                   FINAL_STATUS_USED,
                   1);
  NavigateToDestURL();


  // Run this check again.  When we try to load aa ppapi plugin, the
  // "loadstart" event is asynchronously posted to a message loop.
  // It's possible that earlier call could have been run before the
  // the "loadstart" event was posted.
  // TODO(mmenke):  While this should reliably fail on regressions, the
  //                reliability depends on the specifics of ppapi plugin
  //                loading.  It would be great if we could avoid that.
  EXPECT_TRUE(DidDisplayPass(GetActiveWebContents()));
}

// Checks that plugins in an iframe are not loaded while a page is
// being preloaded, but are loaded when the page is displayed.
#if defined(USE_AURA) && !defined(OS_WIN)
// http://crbug.com/103496
#define MAYBE_PrerenderIframeDelayLoadPlugin \
        DISABLED_PrerenderIframeDelayLoadPlugin
#elif defined(OS_MACOSX)
// http://crbug.com/100514
#define MAYBE_PrerenderIframeDelayLoadPlugin \
        DISABLED_PrerenderIframeDelayLoadPlugin
#elif defined(OS_WIN) && defined(ARCH_CPU_X86_64)
// TODO(jschuh): Failing plugin tests. crbug.com/244653
#define MAYBE_PrerenderIframeDelayLoadPlugin \
        DISABLED_PrerenderIframeDelayLoadPlugin
#else
#define MAYBE_PrerenderIframeDelayLoadPlugin PrerenderIframeDelayLoadPlugin
#endif
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest,
                       MAYBE_PrerenderIframeDelayLoadPlugin) {
  PrerenderTestURL("files/prerender/prerender_iframe_plugin_delay_load.html",
                   FINAL_STATUS_USED,
                   1);
  NavigateToDestURL();
}

// Renders a page that contains a prerender link to a page that contains an
// iframe with a source that requires http authentication. This should not
// prerender successfully.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderHttpAuthentication) {
  PrerenderTestURL("files/prerender/prerender_http_auth_container.html",
                   FINAL_STATUS_AUTH_NEEDED,
                   0);
}

// Checks that client-issued redirects work with prerendering.
// This version navigates to the page which issues the redirection, rather
// than the final destination page.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest,
                       PrerenderClientRedirectNavigateToFirst) {
  PrerenderTestURL(CreateClientRedirect("files/prerender/prerender_page.html"),
                   FINAL_STATUS_USED,
                   2);
  NavigateToDestURL();
}

// Checks that client-issued redirects work with prerendering.
// This version navigates to the final destination page, rather than the
// page which does the redirection.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest,
                       PrerenderClientRedirectNavigateToSecond) {
  PrerenderTestURL(CreateClientRedirect("files/prerender/prerender_page.html"),
                   FINAL_STATUS_USED,
                   2);
  NavigateToURL("files/prerender/prerender_page.html");
}

// Checks that redirects with location.replace do not cancel a prerender and
// and swap when navigating to the first page.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest,
                       PrerenderLocationReplaceNavigateToFirst) {
  PrerenderTestURL("files/prerender/prerender_location_replace.html",
                   FINAL_STATUS_USED,
                   2);
  NavigateToDestURL();
}

// Checks that redirects with location.replace do not cancel a prerender and
// and swap when navigating to the second.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest,
                       PrerenderLocationReplaceNavigateToSecond) {
  PrerenderTestURL("files/prerender/prerender_location_replace.html",
                   FINAL_STATUS_USED,
                   2);
  NavigateToURL("files/prerender/prerender_page.html");
}

// Checks that we get the right PPLT histograms for client redirect prerenders
// and navigations when the referring page is Google.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest,
                       PrerenderLocationReplaceGWSHistograms) {
  DisableJavascriptCalls();
  UMAHistogramHelper histograms;

  // The loader page should look like Google.
  const std::string kGoogleDotCom("www.google.com");
  SetLoaderHostOverride(kGoogleDotCom);
  set_loader_path("files/prerender/prerender_loader_with_replace_state.html");

  GURL dest_url = GetCrossDomainTestUrl(
      "files/prerender/prerender_deferred_image.html");

  GURL prerender_url = test_server()->GetURL(
      "files/prerender/prerender_location_replace.html?" +
      net::EscapeQueryParamValue(dest_url.spec(), false) +
      "#prerender");
  GURL::Replacements replacements;
  replacements.SetHostStr(kGoogleDotCom);
  prerender_url = prerender_url.ReplaceComponents(replacements);

  // The prerender will not completely load until after the swap, so wait for a
  // title change before calling DidPrerenderPass.
  scoped_ptr<TestPrerender> prerender =
      PrerenderTestURL(prerender_url, FINAL_STATUS_USED, 1);
  WaitForASCIITitle(prerender->contents()->prerender_contents(), kReadyTitle);
  EXPECT_TRUE(DidPrerenderPass(prerender->contents()->prerender_contents()));
  EXPECT_EQ(1, prerender->number_of_loads());

  histograms.Fetch();
  histograms.ExpectTotalCount("Prerender.none_PerceivedPLT", 1);
  histograms.ExpectTotalCount("Prerender.none_PerceivedPLTMatched", 0);
  histograms.ExpectTotalCount("Prerender.none_PerceivedPLTMatchedComplete", 0);
  // Although there is a client redirect, it is dropped from histograms because
  // it is a Google URL. The target page itself does not load until after the
  // swap.
  histograms.ExpectTotalCount("Prerender.gws_PrerenderNotSwappedInPLT", 0);

  GURL navigate_url = test_server()->GetURL(
      "files/prerender/prerender_location_replace.html?" +
      net::EscapeQueryParamValue(dest_url.spec(), false) +
      "#navigate");
  navigate_url = navigate_url.ReplaceComponents(replacements);

  NavigationOrSwapObserver swap_observer(
      current_browser()->tab_strip_model(),
      GetActiveWebContents(), 2);
  current_browser()->OpenURL(OpenURLParams(
      navigate_url, Referrer(), CURRENT_TAB,
      content::PAGE_TRANSITION_TYPED, false));
  swap_observer.Wait();

  EXPECT_TRUE(DidDisplayPass(GetActiveWebContents()));

  histograms.Fetch();
  histograms.ExpectTotalCount("Prerender.gws_PrerenderNotSwappedInPLT", 0);
  histograms.ExpectTotalCount("Prerender.gws_PerceivedPLT", 1);
  histograms.ExpectTotalCount("Prerender.gws_PerceivedPLTMatched", 1);
  histograms.ExpectTotalCount(
      "Prerender.gws_PerceivedPLTMatchedComplete", 1);

  // The client redirect does /not/ count as a miss because it's a Google URL.
  histograms.ExpectTotalCount("Prerender.PerceivedPLTFirstAfterMiss", 0);
}

// Checks that client-issued redirects work with prerendering.
// This version navigates to the final destination page, rather than the
// page which does the redirection via a mouse click.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest,
                       PrerenderClientRedirectNavigateToSecondViaClick) {
  GURL prerender_url = test_server()->GetURL(
      CreateClientRedirect("files/prerender/prerender_page.html"));
  GURL destination_url = test_server()->GetURL(
      "files/prerender/prerender_page.html");
  PrerenderTestURL(prerender_url, FINAL_STATUS_USED, 2);
  OpenURLViaClick(destination_url);
}

// Checks that a page served over HTTPS is correctly prerendered.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderHttps) {
  net::SpawnedTestServer https_server(
      net::SpawnedTestServer::TYPE_HTTPS, net::SpawnedTestServer::kLocalhost,
      base::FilePath(FILE_PATH_LITERAL("chrome/test/data")));
  ASSERT_TRUE(https_server.Start());
  GURL https_url = https_server.GetURL("files/prerender/prerender_page.html");
  PrerenderTestURL(https_url,
                   FINAL_STATUS_USED,
                   1);
  NavigateToDestURL();
}

// Checks that client-issued redirects within an iframe in a prerendered
// page will not count as an "alias" for the prerendered page.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest,
                       PrerenderClientRedirectInIframe) {
  std::string redirect_path = CreateClientRedirect(
      "/files/prerender/prerender_embedded_content.html");
  std::vector<net::SpawnedTestServer::StringPair> replacement_text;
  replacement_text.push_back(
      std::make_pair("REPLACE_WITH_URL", "/" + redirect_path));
  std::string replacement_path;
  ASSERT_TRUE(net::SpawnedTestServer::GetFilePathWithReplacements(
      "files/prerender/prerender_with_iframe.html",
      replacement_text,
      &replacement_path));
  PrerenderTestURL(replacement_path, FINAL_STATUS_USED, 2);
  EXPECT_FALSE(UrlIsInPrerenderManager(
      "files/prerender/prerender_embedded_content.html"));
  NavigateToDestURL();
}

// Checks that server-issued redirects work with prerendering.
// This version navigates to the page which issues the redirection, rather
// than the final destination page.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest,
                       PrerenderServerRedirectNavigateToFirst) {
  PrerenderTestURL(CreateServerRedirect("files/prerender/prerender_page.html"),
                   FINAL_STATUS_USED,
                   1);
  NavigateToDestURL();
}

// Checks that server-issued redirects work with prerendering.
// This version navigates to the final destination page, rather than the
// page which does the redirection.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest,
                       PrerenderServerRedirectNavigateToSecond) {
  PrerenderTestURL(CreateServerRedirect("files/prerender/prerender_page.html"),
                   FINAL_STATUS_USED,
                   1);
  NavigateToURL("files/prerender/prerender_page.html");
}

// Checks that server-issued redirects work with prerendering.
// This version navigates to the final destination page, rather than the
// page which does the redirection via a mouse click.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest,
                       PrerenderServerRedirectNavigateToSecondViaClick) {
  GURL prerender_url = test_server()->GetURL(
      CreateServerRedirect("files/prerender/prerender_page.html"));
  GURL destination_url = test_server()->GetURL(
      "files/prerender/prerender_page.html");
  PrerenderTestURL(prerender_url, FINAL_STATUS_USED, 1);
  OpenURLViaClick(destination_url);
}

// Checks that server-issued redirects within an iframe in a prerendered
// page will not count as an "alias" for the prerendered page.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderServerRedirectInIframe) {
  std::string redirect_path = CreateServerRedirect(
      "/files/prerender/prerender_embedded_content.html");
  std::vector<net::SpawnedTestServer::StringPair> replacement_text;
  replacement_text.push_back(
      std::make_pair("REPLACE_WITH_URL", "/" + redirect_path));
  std::string replacement_path;
  ASSERT_TRUE(net::SpawnedTestServer::GetFilePathWithReplacements(
      "files/prerender/prerender_with_iframe.html",
      replacement_text,
      &replacement_path));
  PrerenderTestURL(replacement_path, FINAL_STATUS_USED, 1);
  EXPECT_FALSE(UrlIsInPrerenderManager(
      "files/prerender/prerender_embedded_content.html"));
  NavigateToDestURL();
}

// Prerenders a page that contains an automatic download triggered through an
// iframe. This should not prerender successfully.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderDownloadIframe) {
  PrerenderTestURL("files/prerender/prerender_download_iframe.html",
                   FINAL_STATUS_DOWNLOAD,
                   0);
}

// Prerenders a page that contains an automatic download triggered through
// Javascript changing the window.location. This should not prerender
// successfully
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderDownloadLocation) {
  PrerenderTestURL(CreateClientRedirect("files/download-test1.lib"),
                   FINAL_STATUS_DOWNLOAD,
                   1);
}

// Prerenders a page that contains an automatic download triggered through a
// client-issued redirect. This should not prerender successfully.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderDownloadClientRedirect) {
  PrerenderTestURL("files/prerender/prerender_download_refresh.html",
                   FINAL_STATUS_DOWNLOAD,
                   1);
}

// Checks that the referrer is set when prerendering.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderReferrer) {
  PrerenderTestURL("files/prerender/prerender_referrer.html",
                   FINAL_STATUS_USED,
                   1);
  NavigateToDestURL();
}

// Checks that the referrer is not set when prerendering and the source page is
// HTTPS.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest,
                       PrerenderNoSSLReferrer) {
  UseHttpsSrcServer();
  PrerenderTestURL("files/prerender/prerender_no_referrer.html",
                   FINAL_STATUS_USED,
                   1);
  NavigateToDestURL();
}

// Checks that the referrer is set when prerendering is cancelled.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderCancelReferrer) {
  scoped_ptr<TestContentBrowserClient> test_content_browser_client(
      new TestContentBrowserClient);
  content::ContentBrowserClient* original_browser_client =
      content::SetBrowserClientForTesting(test_content_browser_client.get());

  PrerenderTestURL("files/prerender/prerender_referrer.html",
                   FINAL_STATUS_CANCELLED,
                   1);
  OpenDestURLViaClick();

  EXPECT_TRUE(DidDisplayPass(GetActiveWebContents()));

  content::SetBrowserClientForTesting(original_browser_client);
}

// Checks that popups on a prerendered page cause cancellation.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderPopup) {
  PrerenderTestURL("files/prerender/prerender_popup.html",
                   FINAL_STATUS_CREATE_NEW_WINDOW,
                   0);
}

// Checks that registering a protocol handler causes cancellation.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderRegisterProtocolHandler) {
  PrerenderTestURL("files/prerender/prerender_register_protocol_handler.html",
                   FINAL_STATUS_REGISTER_PROTOCOL_HANDLER,
                   0);
}

// Checks that renderers using excessive memory will be terminated.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderExcessiveMemory) {
  ASSERT_TRUE(GetPrerenderManager());
  GetPrerenderManager()->mutable_config().max_bytes = 30 * 1024 * 1024;
  // The excessive memory kill may happen before or after the load event as it
  // happens asynchronously with IPC calls. Even if the test does not start
  // allocating until after load, the browser process might notice before the
  // message gets through. This happens on XP debug bots because they're so
  // slow. Instead, don't bother checking the load event count.
  DisableLoadEventCheck();
  PrerenderTestURL("files/prerender/prerender_excessive_memory.html",
                   FINAL_STATUS_MEMORY_LIMIT_EXCEEDED, 0);
}

// Checks shutdown code while a prerender is active.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderQuickQuit) {
  DisableJavascriptCalls();
  DisableLoadEventCheck();
  PrerenderTestURL("files/prerender/prerender_page.html",
                   FINAL_STATUS_APP_TERMINATING,
                   0);
}

// Checks that we don't prerender in an infinite loop.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderInfiniteLoop) {
  const char* const kHtmlFileA = "files/prerender/prerender_infinite_a.html";
  const char* const kHtmlFileB = "files/prerender/prerender_infinite_b.html";

  std::vector<FinalStatus> expected_final_status_queue;
  expected_final_status_queue.push_back(FINAL_STATUS_USED);
  expected_final_status_queue.push_back(FINAL_STATUS_APP_TERMINATING);

  ScopedVector<TestPrerender> prerenders =
      PrerenderTestURL(kHtmlFileA, expected_final_status_queue, 1);
  ASSERT_TRUE(prerenders[0]->contents());
  // Assert that the pending prerender is in there already. This relies on the
  // fact that the renderer sends out the AddLinkRelPrerender IPC before sending
  // the page load one.
  EXPECT_EQ(2U, GetLinkPrerenderCount());
  EXPECT_EQ(1U, GetRunningLinkPrerenderCount());

  // Next url should be in pending list but not an active entry.
  EXPECT_FALSE(UrlIsInPrerenderManager(kHtmlFileB));

  NavigateToDestURL();

  // Make sure the PrerenderContents for the next url is now in the manager and
  // not pending. This relies on pending prerenders being resolved in the same
  // event loop iteration as OnPrerenderStop.
  EXPECT_TRUE(UrlIsInPrerenderManager(kHtmlFileB));
  EXPECT_EQ(1U, GetLinkPrerenderCount());
  EXPECT_EQ(1U, GetRunningLinkPrerenderCount());
}

// Checks that we don't prerender in an infinite loop and multiple links are
// handled correctly.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest,
                       PrerenderInfiniteLoopMultiple) {
  const char* const kHtmlFileA =
      "files/prerender/prerender_infinite_a_multiple.html";
  const char* const kHtmlFileB =
      "files/prerender/prerender_infinite_b_multiple.html";
  const char* const kHtmlFileC =
      "files/prerender/prerender_infinite_c_multiple.html";

  // This test is conceptually simplest if concurrency is at two, since we
  // don't have to worry about which of kHtmlFileB or kHtmlFileC gets evicted.
  GetPrerenderManager()->mutable_config().max_link_concurrency = 2;
  GetPrerenderManager()->mutable_config().max_link_concurrency_per_launcher = 2;

  std::vector<FinalStatus> expected_final_status_queue;
  expected_final_status_queue.push_back(FINAL_STATUS_USED);
  expected_final_status_queue.push_back(FINAL_STATUS_APP_TERMINATING);
  expected_final_status_queue.push_back(FINAL_STATUS_APP_TERMINATING);

  ScopedVector<TestPrerender> prerenders =
      PrerenderTestURL(kHtmlFileA, expected_final_status_queue, 1);
  ASSERT_TRUE(prerenders[0]->contents());

  // Next url should be in pending list but not an active entry. This relies on
  // the fact that the renderer sends out the AddLinkRelPrerender IPC before
  // sending the page load one.
  EXPECT_EQ(3U, GetLinkPrerenderCount());
  EXPECT_EQ(1U, GetRunningLinkPrerenderCount());
  EXPECT_FALSE(UrlIsInPrerenderManager(kHtmlFileB));
  EXPECT_FALSE(UrlIsInPrerenderManager(kHtmlFileC));

  NavigateToDestURL();

  // Make sure the PrerenderContents for the next urls are now in the manager
  // and not pending. One and only one of the URLs (the last seen) should be the
  // active entry. This relies on pending prerenders being resolved in the same
  // event loop iteration as OnPrerenderStop.
  bool url_b_is_active_prerender = UrlIsInPrerenderManager(kHtmlFileB);
  bool url_c_is_active_prerender = UrlIsInPrerenderManager(kHtmlFileC);
  EXPECT_TRUE(url_b_is_active_prerender && url_c_is_active_prerender);
  EXPECT_EQ(2U, GetLinkPrerenderCount());
  EXPECT_EQ(2U, GetRunningLinkPrerenderCount());
}

// Checks that pending prerenders are aborted (and never launched) when launched
// by a prerender that itself gets aborted.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderAbortPendingOnCancel) {
  const char* const kHtmlFileA = "files/prerender/prerender_infinite_a.html";
  const char* const kHtmlFileB = "files/prerender/prerender_infinite_b.html";

  scoped_ptr<TestPrerender> prerender =
      PrerenderTestURL(kHtmlFileA, FINAL_STATUS_CANCELLED, 1);
  ASSERT_TRUE(prerender->contents());
  // Assert that the pending prerender is in there already. This relies on the
  // fact that the renderer sends out the AddLinkRelPrerender IPC before sending
  // the page load one.
  EXPECT_EQ(2U, GetLinkPrerenderCount());
  EXPECT_EQ(1U, GetRunningLinkPrerenderCount());

  // Next url should be in pending list but not an active entry.
  EXPECT_FALSE(UrlIsInPrerenderManager(kHtmlFileB));

  // Cancel the prerender.
  GetPrerenderManager()->CancelAllPrerenders();
  prerender->WaitForStop();

  // All prerenders are now gone.
  EXPECT_TRUE(IsEmptyPrerenderLinkManager());
}

IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, OpenTaskManagerBeforePrerender) {
  const base::string16 any_prerender = MatchTaskManagerPrerender("*");
  const base::string16 any_tab = MatchTaskManagerTab("*");
  const base::string16 original = MatchTaskManagerTab("Preloader");
  const base::string16 prerender = MatchTaskManagerPrerender("Prerender Page");
  const base::string16 final = MatchTaskManagerTab("Prerender Page");

  // Show the task manager. This populates the model.
  chrome::OpenTaskManager(current_browser());
  ASSERT_NO_FATAL_FAILURE(WaitForTaskManagerRows(1, any_tab));
  ASSERT_NO_FATAL_FAILURE(WaitForTaskManagerRows(0, any_prerender));

  // Prerender a page in addition to the original tab.
  PrerenderTestURL("files/prerender/prerender_page.html", FINAL_STATUS_USED, 1);

  // A TaskManager entry should appear like "Prerender: Prerender Page"
  // alongside the original tab entry. There should be just these two entries.
  ASSERT_NO_FATAL_FAILURE(WaitForTaskManagerRows(1, prerender));
  ASSERT_NO_FATAL_FAILURE(WaitForTaskManagerRows(1, original));
  ASSERT_NO_FATAL_FAILURE(WaitForTaskManagerRows(0, final));
  ASSERT_NO_FATAL_FAILURE(WaitForTaskManagerRows(1, any_prerender));
  ASSERT_NO_FATAL_FAILURE(WaitForTaskManagerRows(1, any_tab));

  // Swap in the prerendered content.
  NavigateToDestURL();

  // The "Prerender: " TaskManager entry should disappear, being replaced by a
  // "Tab: Prerender Page" entry, and nothing else.
  ASSERT_NO_FATAL_FAILURE(WaitForTaskManagerRows(0, prerender));
  ASSERT_NO_FATAL_FAILURE(WaitForTaskManagerRows(0, original));
  ASSERT_NO_FATAL_FAILURE(WaitForTaskManagerRows(1, final));
  ASSERT_NO_FATAL_FAILURE(WaitForTaskManagerRows(1, any_tab));
  ASSERT_NO_FATAL_FAILURE(WaitForTaskManagerRows(0, any_prerender));
}

IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, OpenTaskManagerAfterPrerender) {
  const base::string16 any_prerender = MatchTaskManagerPrerender("*");
  const base::string16 any_tab = MatchTaskManagerTab("*");
  const base::string16 original = MatchTaskManagerTab("Preloader");
  const base::string16 prerender = MatchTaskManagerPrerender("Prerender Page");
  const base::string16 final = MatchTaskManagerTab("Prerender Page");

  // Start with two resources.
  PrerenderTestURL("files/prerender/prerender_page.html", FINAL_STATUS_USED, 1);

  // Show the task manager. This populates the model. Importantly, we're doing
  // this after the prerender WebContents already exists - the task manager
  // needs to find it, it can't just listen for creation.
  chrome::OpenTaskManager(current_browser());

  // A TaskManager entry should appear like "Prerender: Prerender Page"
  ASSERT_NO_FATAL_FAILURE(WaitForTaskManagerRows(1, prerender));
  ASSERT_NO_FATAL_FAILURE(WaitForTaskManagerRows(1, original));
  ASSERT_NO_FATAL_FAILURE(WaitForTaskManagerRows(0, final));
  ASSERT_NO_FATAL_FAILURE(WaitForTaskManagerRows(1, any_prerender));
  ASSERT_NO_FATAL_FAILURE(WaitForTaskManagerRows(1, any_tab));

  // Swap in the tab.
  NavigateToDestURL();

  // The "Prerender: Prerender Page" TaskManager row should disappear, being
  // replaced by "Tab: Prerender Page"
  ASSERT_NO_FATAL_FAILURE(WaitForTaskManagerRows(0, prerender));
  ASSERT_NO_FATAL_FAILURE(WaitForTaskManagerRows(0, original));
  ASSERT_NO_FATAL_FAILURE(WaitForTaskManagerRows(1, final));
  ASSERT_NO_FATAL_FAILURE(WaitForTaskManagerRows(1, any_tab));
  ASSERT_NO_FATAL_FAILURE(WaitForTaskManagerRows(0, any_prerender));
}

IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, OpenTaskManagerAfterSwapIn) {
  const base::string16 any_prerender = MatchTaskManagerPrerender("*");
  const base::string16 any_tab = MatchTaskManagerTab("*");
  const base::string16 final = MatchTaskManagerTab("Prerender Page");

  // Prerender, and swap it in.
  PrerenderTestURL("files/prerender/prerender_page.html", FINAL_STATUS_USED, 1);
  NavigateToDestURL();

  // Show the task manager. This populates the model. Importantly, we're doing
  // this after the prerender has been swapped in.
  chrome::OpenTaskManager(current_browser());

  // We should not see a prerender resource in the task manager, just a normal
  // page.
  ASSERT_NO_FATAL_FAILURE(WaitForTaskManagerRows(1, final));
  ASSERT_NO_FATAL_FAILURE(WaitForTaskManagerRows(1, any_tab));
  ASSERT_NO_FATAL_FAILURE(WaitForTaskManagerRows(0, any_prerender));
}

// Checks that audio loads are deferred on prerendering.
// Times out under AddressSanitizer, see http://crbug.com/108402
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, DISABLED_PrerenderHTML5Audio) {
  PrerenderTestURL("files/prerender/prerender_html5_audio.html",
                   FINAL_STATUS_USED,
                   1);
  NavigateToDestURL();
  WaitForASCIITitle(GetActiveWebContents(), kPassTitle);
}

// Checks that audio loads are deferred on prerendering and played back when
// the prerender is swapped in if autoplay is set.
// Periodically fails on chrome-os.  See http://crbug.com/145263
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest,
                       DISABLED_PrerenderHTML5AudioAutoplay) {
  PrerenderTestURL("files/prerender/prerender_html5_audio_autoplay.html",
                   FINAL_STATUS_USED,
                   1);
  NavigateToDestURL();
  WaitForASCIITitle(GetActiveWebContents(), kPassTitle);
}

// Checks that audio loads are deferred on prerendering and played back when
// the prerender is swapped in if js starts playing.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest,
                       DISABLED_PrerenderHTML5AudioJsplay) {
  PrerenderTestURL("files/prerender/prerender_html5_audio_jsplay.html",
                   FINAL_STATUS_USED,
                   1);
  NavigateToDestURL();
  WaitForASCIITitle(GetActiveWebContents(), kPassTitle);
}

// Checks that video loads are deferred on prerendering.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, DISABLED_PrerenderHTML5Video) {
  PrerenderTestURL("files/prerender/prerender_html5_video.html",
                   FINAL_STATUS_USED,
                   1);
  NavigateToDestURL();
  WaitForASCIITitle(GetActiveWebContents(), kPassTitle);
}

// Checks that video tags inserted by javascript are deferred and played
// correctly on swap in.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest,
                       DISABLED_PrerenderHTML5VideoJs) {
  PrerenderTestURL("files/prerender/prerender_html5_video_script.html",
                   FINAL_STATUS_USED,
                   1);
  NavigateToDestURL();
  WaitForASCIITitle(GetActiveWebContents(), kPassTitle);
}

// Checks for correct network events by using a busy sleep the javascript.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest,
                       DISABLED_PrerenderHTML5VideoNetwork) {
  DisableJavascriptCalls();
  scoped_ptr<TestPrerender> prerender =
      PrerenderTestURL("files/prerender/prerender_html5_video_network.html",
                       FINAL_STATUS_USED,
                       1);
  WaitForASCIITitle(prerender->contents()->prerender_contents(), kReadyTitle);
  EXPECT_TRUE(DidPrerenderPass(prerender->contents()->prerender_contents()));
  NavigateToDestURL();
  WaitForASCIITitle(GetActiveWebContents(), kPassTitle);
}

// Checks that scripts can retrieve the correct window size while prerendering.
#if defined(TOOLKIT_VIEWS)
// TODO(beng): Widget hierarchy split causes this to fail http://crbug.com/82363
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, DISABLED_PrerenderWindowSize) {
#else
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderWindowSize) {
#endif
  PrerenderTestURL("files/prerender/prerender_size.html",
                   FINAL_STATUS_USED,
                   1);
  NavigateToDestURL();
}

// TODO(jam): http://crbug.com/350550
#if !(defined(OS_CHROMEOS) && defined(ADDRESS_SANITIZER))

// Checks that prerenderers will terminate when the RenderView crashes.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderRendererCrash) {
  scoped_ptr<TestPrerender> prerender =
      PrerenderTestURL("files/prerender/prerender_page.html",
                       FINAL_STATUS_RENDERER_CRASHED,
                       1);

  // Navigate to about:crash and then wait for the renderer to crash.
  ASSERT_TRUE(prerender->contents());
  ASSERT_TRUE(prerender->contents()->prerender_contents());
  prerender->contents()->prerender_contents()->GetController().
      LoadURL(
          GURL(content::kChromeUICrashURL),
          content::Referrer(),
          content::PAGE_TRANSITION_TYPED,
          std::string());
  prerender->WaitForStop();
}
#endif

IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest,
                       PrerenderPageWithFragment) {
  PrerenderTestURL("files/prerender/prerender_page.html#fragment",
                   FINAL_STATUS_USED,
                   1);

  ChannelDestructionWatcher channel_close_watcher;
  channel_close_watcher.WatchChannel(browser()->tab_strip_model()->
      GetActiveWebContents()->GetRenderProcessHost());
  NavigateToDestURL();
  channel_close_watcher.WaitForChannelClose();

  ASSERT_TRUE(IsEmptyPrerenderLinkManager());
}

IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest,
                       PrerenderPageWithRedirectedFragment) {
  PrerenderTestURL(
      CreateClientRedirect("files/prerender/prerender_page.html#fragment"),
      FINAL_STATUS_USED,
      2);

  ChannelDestructionWatcher channel_close_watcher;
  channel_close_watcher.WatchChannel(browser()->tab_strip_model()->
      GetActiveWebContents()->GetRenderProcessHost());
  NavigateToDestURL();
  channel_close_watcher.WaitForChannelClose();

  ASSERT_TRUE(IsEmptyPrerenderLinkManager());
}

// Checks that we do not use a prerendered page when navigating from
// the main page to a fragment.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest,
                       PrerenderPageNavigateFragment) {
  PrerenderTestURL("files/prerender/no_prerender_page.html",
                   FINAL_STATUS_APP_TERMINATING,
                   1);
  NavigateToURLWithDisposition(
      "files/prerender/no_prerender_page.html#fragment",
      CURRENT_TAB, false);
}

// Checks that we do not use a prerendered page when we prerender a fragment
// but navigate to the main page.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest,
                       PrerenderFragmentNavigatePage) {
  PrerenderTestURL("files/prerender/no_prerender_page.html#fragment",
                   FINAL_STATUS_APP_TERMINATING,
                   1);
  NavigateToURLWithDisposition(
      "files/prerender/no_prerender_page.html",
      CURRENT_TAB, false);
}

// Checks that we do not use a prerendered page when we prerender a fragment
// but navigate to a different fragment on the same page.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest,
                       PrerenderFragmentNavigateFragment) {
  PrerenderTestURL("files/prerender/no_prerender_page.html#other_fragment",
                   FINAL_STATUS_APP_TERMINATING,
                   1);
  NavigateToURLWithDisposition(
      "files/prerender/no_prerender_page.html#fragment",
      CURRENT_TAB, false);
}

// Checks that we do not use a prerendered page when the page uses a client
// redirect to refresh from a fragment on the same page.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest,
                       PrerenderClientRedirectFromFragment) {
  PrerenderTestURL(
      CreateClientRedirect("files/prerender/no_prerender_page.html#fragment"),
      FINAL_STATUS_APP_TERMINATING,
      2);
  NavigateToURLWithDisposition(
      "files/prerender/no_prerender_page.html",
      CURRENT_TAB, false);
}

// Checks that we do not use a prerendered page when the page uses a client
// redirect to refresh to a fragment on the same page.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest,
                       PrerenderClientRedirectToFragment) {
  PrerenderTestURL(
      CreateClientRedirect("files/prerender/no_prerender_page.html"),
      FINAL_STATUS_APP_TERMINATING,
      2);
  NavigateToURLWithDisposition(
      "files/prerender/no_prerender_page.html#fragment",
      CURRENT_TAB, false);
}

// Checks that we correctly use a prerendered page when the page uses JS to set
// the window.location.hash to a fragment on the same page.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest,
                       PrerenderPageChangeFragmentLocationHash) {
  PrerenderTestURL("files/prerender/prerender_fragment_location_hash.html",
                   FINAL_STATUS_USED,
                   1);
  NavigateToURL("files/prerender/prerender_fragment_location_hash.html");
}

// Checks that prerendering a PNG works correctly.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderImagePng) {
  DisableJavascriptCalls();
  PrerenderTestURL("files/prerender/image.png", FINAL_STATUS_USED, 1);
  NavigateToDestURL();
}

// Checks that prerendering a JPG works correctly.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderImageJpeg) {
  DisableJavascriptCalls();
  PrerenderTestURL("files/prerender/image.jpeg", FINAL_STATUS_USED, 1);
  NavigateToDestURL();
}

// Checks that a prerender of a CRX will result in a cancellation due to
// download.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderCrx) {
  PrerenderTestURL("files/prerender/extension.crx", FINAL_STATUS_DOWNLOAD, 0);
}

// Checks that xhr GET requests allow prerenders.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderXhrGet) {
  PrerenderTestURL("files/prerender/prerender_xhr_get.html",
                   FINAL_STATUS_USED,
                   1);
  NavigateToDestURL();
}

// Checks that xhr HEAD requests allow prerenders.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderXhrHead) {
  PrerenderTestURL("files/prerender/prerender_xhr_head.html",
                   FINAL_STATUS_USED,
                   1);
  NavigateToDestURL();
}

// Checks that xhr OPTIONS requests allow prerenders.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderXhrOptions) {
  PrerenderTestURL("files/prerender/prerender_xhr_options.html",
                   FINAL_STATUS_USED,
                   1);
  NavigateToDestURL();
}

// Checks that xhr TRACE requests allow prerenders.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderXhrTrace) {
  PrerenderTestURL("files/prerender/prerender_xhr_trace.html",
                   FINAL_STATUS_USED,
                   1);
  NavigateToDestURL();
}

// Checks that xhr POST requests allow prerenders.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderXhrPost) {
  PrerenderTestURL("files/prerender/prerender_xhr_post.html",
                   FINAL_STATUS_USED,
                   1);
  NavigateToDestURL();
}

// Checks that xhr PUT cancels prerenders.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderXhrPut) {
  PrerenderTestURL("files/prerender/prerender_xhr_put.html",
                   FINAL_STATUS_INVALID_HTTP_METHOD,
                   1);
}

// Checks that xhr DELETE cancels prerenders.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderXhrDelete) {
  PrerenderTestURL("files/prerender/prerender_xhr_delete.html",
                   FINAL_STATUS_INVALID_HTTP_METHOD,
                   1);
}

// Checks that a top-level page which would trigger an SSL error is canceled.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderSSLErrorTopLevel) {
  net::SpawnedTestServer::SSLOptions ssl_options;
  ssl_options.server_certificate =
      net::SpawnedTestServer::SSLOptions::CERT_MISMATCHED_NAME;
  net::SpawnedTestServer https_server(
      net::SpawnedTestServer::TYPE_HTTPS, ssl_options,
      base::FilePath(FILE_PATH_LITERAL("chrome/test/data")));
  ASSERT_TRUE(https_server.Start());
  GURL https_url = https_server.GetURL("files/prerender/prerender_page.html");
  PrerenderTestURL(https_url,
                   FINAL_STATUS_SSL_ERROR,
                   0);
}

// Checks that an SSL error that comes from a subresource does not cancel
// the page. Non-main-frame requests are simply cancelled if they run into
// an SSL problem.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderSSLErrorSubresource) {
  net::SpawnedTestServer::SSLOptions ssl_options;
  ssl_options.server_certificate =
      net::SpawnedTestServer::SSLOptions::CERT_MISMATCHED_NAME;
  net::SpawnedTestServer https_server(
      net::SpawnedTestServer::TYPE_HTTPS, ssl_options,
      base::FilePath(FILE_PATH_LITERAL("chrome/test/data")));
  ASSERT_TRUE(https_server.Start());
  GURL https_url = https_server.GetURL("files/prerender/image.jpeg");
  std::vector<net::SpawnedTestServer::StringPair> replacement_text;
  replacement_text.push_back(
      std::make_pair("REPLACE_WITH_IMAGE_URL", https_url.spec()));
  std::string replacement_path;
  ASSERT_TRUE(net::SpawnedTestServer::GetFilePathWithReplacements(
      "files/prerender/prerender_with_image.html",
      replacement_text,
      &replacement_path));
  PrerenderTestURL(replacement_path, FINAL_STATUS_USED, 1);
  NavigateToDestURL();
}

// Checks that an SSL error that comes from an iframe does not cancel
// the page. Non-main-frame requests are simply cancelled if they run into
// an SSL problem.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderSSLErrorIframe) {
  net::SpawnedTestServer::SSLOptions ssl_options;
  ssl_options.server_certificate =
      net::SpawnedTestServer::SSLOptions::CERT_MISMATCHED_NAME;
  net::SpawnedTestServer https_server(
      net::SpawnedTestServer::TYPE_HTTPS, ssl_options,
      base::FilePath(FILE_PATH_LITERAL("chrome/test/data")));
  ASSERT_TRUE(https_server.Start());
  GURL https_url = https_server.GetURL(
      "files/prerender/prerender_embedded_content.html");
  std::vector<net::SpawnedTestServer::StringPair> replacement_text;
  replacement_text.push_back(
      std::make_pair("REPLACE_WITH_URL", https_url.spec()));
  std::string replacement_path;
  ASSERT_TRUE(net::SpawnedTestServer::GetFilePathWithReplacements(
      "files/prerender/prerender_with_iframe.html",
      replacement_text,
      &replacement_path));
  PrerenderTestURL(replacement_path, FINAL_STATUS_USED, 1);
  NavigateToDestURL();
}

// Checks that we cancel correctly when window.print() is called.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderPrint) {
  PrerenderTestURL("files/prerender/prerender_print.html",
                   FINAL_STATUS_WINDOW_PRINT,
                   0);
}

// Checks that if a page is opened in a new window by javascript and both the
// pages are in the same domain, the prerendered page is not used, due to
// window.opener.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest,
                       PrerenderSameDomainWindowOpenerWindowOpen) {
  PrerenderTestURL("files/prerender/prerender_page.html",
                   FINAL_STATUS_WINDOW_OPENER,
                   1);
  OpenDestURLViaWindowOpen();
}

// Checks that if a page is opened due to click on a href with target="_blank"
// and both pages are in the same domain the prerendered page is not used, due
// to window.opener.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest,
                       PrerenderSameDomainWindowOpenerClickTarget) {
  PrerenderTestURL("files/prerender/prerender_page.html",
                   FINAL_STATUS_WINDOW_OPENER,
                   1);
  OpenDestURLViaClickTarget();
}

class TestClientCertStore : public net::ClientCertStore {
 public:
  TestClientCertStore() {}
  virtual ~TestClientCertStore() {}

  // net::ClientCertStore:
  virtual void GetClientCerts(const net::SSLCertRequestInfo& cert_request_info,
                              net::CertificateList* selected_certs,
                              const base::Closure& callback) OVERRIDE {
    *selected_certs = net::CertificateList(
        1, scoped_refptr<net::X509Certificate>(
        new net::X509Certificate("test", "test", base::Time(), base::Time())));
    callback.Run();
  }
};

scoped_ptr<net::ClientCertStore> CreateCertStore() {
  return scoped_ptr<net::ClientCertStore>(new TestClientCertStore);
}

// Checks that a top-level page which would normally request an SSL client
// certificate will never be seen since it's an https top-level resource.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest,
                       PrerenderSSLClientCertTopLevel) {
  ProfileIOData::FromResourceContext(
      current_browser()->profile()->GetResourceContext())->
          set_client_cert_store_factory_for_testing(
              base::Bind(&CreateCertStore));
  net::SpawnedTestServer::SSLOptions ssl_options;
  ssl_options.request_client_certificate = true;
  net::SpawnedTestServer https_server(
      net::SpawnedTestServer::TYPE_HTTPS, ssl_options,
      base::FilePath(FILE_PATH_LITERAL("chrome/test/data")));
  ASSERT_TRUE(https_server.Start());
  GURL https_url = https_server.GetURL("files/prerender/prerender_page.html");
  PrerenderTestURL(https_url, FINAL_STATUS_SSL_CLIENT_CERTIFICATE_REQUESTED, 0);
}

// Checks that an SSL Client Certificate request that originates from a
// subresource will cancel the prerendered page.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest,
                       PrerenderSSLClientCertSubresource) {
  ProfileIOData::FromResourceContext(
      current_browser()->profile()->GetResourceContext())->
          set_client_cert_store_factory_for_testing(
              base::Bind(&CreateCertStore));
  net::SpawnedTestServer::SSLOptions ssl_options;
  ssl_options.request_client_certificate = true;
  net::SpawnedTestServer https_server(
      net::SpawnedTestServer::TYPE_HTTPS, ssl_options,
      base::FilePath(FILE_PATH_LITERAL("chrome/test/data")));
  ASSERT_TRUE(https_server.Start());
  GURL https_url = https_server.GetURL("files/prerender/image.jpeg");
  std::vector<net::SpawnedTestServer::StringPair> replacement_text;
  replacement_text.push_back(
      std::make_pair("REPLACE_WITH_IMAGE_URL", https_url.spec()));
  std::string replacement_path;
  ASSERT_TRUE(net::SpawnedTestServer::GetFilePathWithReplacements(
      "files/prerender/prerender_with_image.html",
      replacement_text,
      &replacement_path));
  PrerenderTestURL(replacement_path,
                   FINAL_STATUS_SSL_CLIENT_CERTIFICATE_REQUESTED,
                   0);
}

// Checks that an SSL Client Certificate request that originates from an
// iframe will cancel the prerendered page.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderSSLClientCertIframe) {
  ProfileIOData::FromResourceContext(
      current_browser()->profile()->GetResourceContext())->
          set_client_cert_store_factory_for_testing(
              base::Bind(&CreateCertStore));
  net::SpawnedTestServer::SSLOptions ssl_options;
  ssl_options.request_client_certificate = true;
  net::SpawnedTestServer https_server(
      net::SpawnedTestServer::TYPE_HTTPS, ssl_options,
      base::FilePath(FILE_PATH_LITERAL("chrome/test/data")));
  ASSERT_TRUE(https_server.Start());
  GURL https_url = https_server.GetURL(
      "files/prerender/prerender_embedded_content.html");
  std::vector<net::SpawnedTestServer::StringPair> replacement_text;
  replacement_text.push_back(
      std::make_pair("REPLACE_WITH_URL", https_url.spec()));
  std::string replacement_path;
  ASSERT_TRUE(net::SpawnedTestServer::GetFilePathWithReplacements(
      "files/prerender/prerender_with_iframe.html",
      replacement_text,
      &replacement_path));
  PrerenderTestURL(replacement_path,
                   FINAL_STATUS_SSL_CLIENT_CERTIFICATE_REQUESTED,
                   0);
}

#if defined(FULL_SAFE_BROWSING)
// Ensures that we do not prerender pages with a safe browsing
// interstitial.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderSafeBrowsingTopLevel) {
  GURL url = test_server()->GetURL("files/prerender/prerender_page.html");
  GetFakeSafeBrowsingDatabaseManager()->SetThreatTypeForUrl(
      url, SB_THREAT_TYPE_URL_MALWARE);
  PrerenderTestURL("files/prerender/prerender_page.html",
                   FINAL_STATUS_SAFE_BROWSING, 0);
}

// Ensures that server redirects to a malware page will cancel prerenders.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest,
                       PrerenderSafeBrowsingServerRedirect) {
  GURL url = test_server()->GetURL("files/prerender/prerender_page.html");
  GetFakeSafeBrowsingDatabaseManager()->SetThreatTypeForUrl(
      url, SB_THREAT_TYPE_URL_MALWARE);
  PrerenderTestURL(CreateServerRedirect("files/prerender/prerender_page.html"),
                   FINAL_STATUS_SAFE_BROWSING,
                   0);
}

// Ensures that client redirects to a malware page will cancel prerenders.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest,
                       PrerenderSafeBrowsingClientRedirect) {
  GURL url = test_server()->GetURL("files/prerender/prerender_page.html");
  GetFakeSafeBrowsingDatabaseManager()->SetThreatTypeForUrl(
      url, SB_THREAT_TYPE_URL_MALWARE);
  PrerenderTestURL(CreateClientRedirect("files/prerender/prerender_page.html"),
                   FINAL_STATUS_SAFE_BROWSING,
                   1);
}

// Ensures that we do not prerender pages which have a malware subresource.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderSafeBrowsingSubresource) {
  GURL image_url = test_server()->GetURL("files/prerender/image.jpeg");
  GetFakeSafeBrowsingDatabaseManager()->SetThreatTypeForUrl(
      image_url, SB_THREAT_TYPE_URL_MALWARE);
  std::vector<net::SpawnedTestServer::StringPair> replacement_text;
  replacement_text.push_back(
      std::make_pair("REPLACE_WITH_IMAGE_URL", image_url.spec()));
  std::string replacement_path;
  ASSERT_TRUE(net::SpawnedTestServer::GetFilePathWithReplacements(
      "files/prerender/prerender_with_image.html",
      replacement_text,
      &replacement_path));
  PrerenderTestURL(replacement_path,
                   FINAL_STATUS_SAFE_BROWSING,
                   0);
}

// Ensures that we do not prerender pages which have a malware iframe.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderSafeBrowsingIframe) {
  GURL iframe_url = test_server()->GetURL(
      "files/prerender/prerender_embedded_content.html");
  GetFakeSafeBrowsingDatabaseManager()->SetThreatTypeForUrl(
      iframe_url, SB_THREAT_TYPE_URL_MALWARE);
  std::vector<net::SpawnedTestServer::StringPair> replacement_text;
  replacement_text.push_back(
      std::make_pair("REPLACE_WITH_URL", iframe_url.spec()));
  std::string replacement_path;
  ASSERT_TRUE(net::SpawnedTestServer::GetFilePathWithReplacements(
      "files/prerender/prerender_with_iframe.html",
      replacement_text,
      &replacement_path));
  PrerenderTestURL(replacement_path,
                   FINAL_STATUS_SAFE_BROWSING,
                   0);
}

#endif

// Checks that a local storage read will not cause prerender to fail.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderLocalStorageRead) {
  PrerenderTestURL("files/prerender/prerender_localstorage_read.html",
                   FINAL_STATUS_USED,
                   1);
  NavigateToDestURL();
}

// Checks that a local storage write will not cause prerender to fail.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderLocalStorageWrite) {
  PrerenderTestURL("files/prerender/prerender_localstorage_write.html",
                   FINAL_STATUS_USED,
                   1);
  NavigateToDestURL();
}

// Checks that the favicon is properly loaded on prerender.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderFavicon) {
  scoped_ptr<TestPrerender> prerender =
      PrerenderTestURL("files/prerender/prerender_favicon.html",
                       FINAL_STATUS_USED,
                       1);
  NavigateToDestURL();

  if (!FaviconTabHelper::FromWebContents(
          GetActiveWebContents())->FaviconIsValid()) {
    // If the favicon has not been set yet, wait for it to be.
    content::WindowedNotificationObserver favicon_update_watcher(
        chrome::NOTIFICATION_FAVICON_UPDATED,
        content::Source<WebContents>(GetActiveWebContents()));
    favicon_update_watcher.Wait();
  }
  EXPECT_TRUE(FaviconTabHelper::FromWebContents(
      GetActiveWebContents())->FaviconIsValid());
}

// Checks that when a prerendered page is swapped in to a referring page, the
// unload handlers on the referring page are executed.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderUnload) {
  // Matches URL in prerender_loader_with_unload.html.
  const GURL unload_url("http://unload-url.test");
  base::FilePath empty_file = ui_test_utils::GetTestFilePath(
      base::FilePath(), base::FilePath(FILE_PATH_LITERAL("empty.html")));
  RequestCounter unload_counter;
  BrowserThread::PostTask(
      BrowserThread::IO, FROM_HERE,
      base::Bind(&CreateCountingProtocolHandlerOnIO,
                 unload_url, empty_file, unload_counter.AsWeakPtr()));

  set_loader_path("files/prerender/prerender_loader_with_unload.html");
  PrerenderTestURL("files/prerender/prerender_page.html", FINAL_STATUS_USED, 1);
  NavigateToDestURL();
  unload_counter.WaitForCount(1);
}

// Checks that a hanging unload on the referring page of a prerender swap does
// not crash the browser on exit.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderHangingUnload) {
  // Matches URL in prerender_loader_with_unload.html.
  const GURL hang_url("http://unload-url.test");
  base::FilePath empty_file = ui_test_utils::GetTestFilePath(
      base::FilePath(), base::FilePath(FILE_PATH_LITERAL("empty.html")));
  BrowserThread::PostTask(
      BrowserThread::IO, FROM_HERE,
      base::Bind(&CreateHangingFirstRequestProtocolHandlerOnIO,
                 hang_url, empty_file,
                 base::Closure()));

  set_loader_path("files/prerender/prerender_loader_with_unload.html");
  PrerenderTestURL("files/prerender/prerender_page.html", FINAL_STATUS_USED, 1);
  NavigateToDestURL();
}


// Checks that when the history is cleared, prerendering is cancelled and
// prerendering history is cleared.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderClearHistory) {
  scoped_ptr<TestPrerender> prerender =
      PrerenderTestURL("files/prerender/prerender_page.html",
                       FINAL_STATUS_CACHE_OR_HISTORY_CLEARED,
                       1);

  base::MessageLoop::current()->PostTask(
      FROM_HERE,
      base::Bind(&ClearBrowsingData, current_browser(),
                 BrowsingDataRemover::REMOVE_HISTORY));
  prerender->WaitForStop();

  // Make sure prerender history was cleared.
  EXPECT_EQ(0, GetHistoryLength());
}

// Disabled due to flakiness: crbug.com/316225
// Checks that when the cache is cleared, prerenders are cancelled but
// prerendering history is not cleared.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, DISABLED_PrerenderClearCache) {
  scoped_ptr<TestPrerender> prerender =
      PrerenderTestURL("files/prerender/prerender_page.html",
                       FINAL_STATUS_CACHE_OR_HISTORY_CLEARED,
                       1);

  base::MessageLoop::current()->PostTask(FROM_HERE,
      base::Bind(&ClearBrowsingData, current_browser(),
                 BrowsingDataRemover::REMOVE_CACHE));
  prerender->WaitForStop();

  // Make sure prerender history was not cleared.  Not a vital behavior, but
  // used to compare with PrerenderClearHistory test.
  EXPECT_EQ(1, GetHistoryLength());
}

IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderCancelAll) {
  scoped_ptr<TestPrerender> prerender =
      PrerenderTestURL("files/prerender/prerender_page.html",
                       FINAL_STATUS_CANCELLED,
                       1);

  GetPrerenderManager()->CancelAllPrerenders();
  prerender->WaitForStop();

  EXPECT_FALSE(prerender->contents());
}

IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderEvents) {
  scoped_ptr<TestPrerender> prerender =
      PrerenderTestURL("files/prerender/prerender_page.html",
                       FINAL_STATUS_CANCELLED, 1);

  GetPrerenderManager()->CancelAllPrerenders();
  prerender->WaitForStop();

  EXPECT_TRUE(DidReceivePrerenderStartEventForLinkNumber(0));
  EXPECT_TRUE(DidReceivePrerenderStopEventForLinkNumber(0));
  EXPECT_FALSE(HadPrerenderEventErrors());
}

// Cancels the prerender of a page with its own prerender.  The second prerender
// should never be started.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest,
                       PrerenderCancelPrerenderWithPrerender) {
  scoped_ptr<TestPrerender> prerender =
      PrerenderTestURL("files/prerender/prerender_infinite_a.html",
                       FINAL_STATUS_CANCELLED,
                       1);

  GetPrerenderManager()->CancelAllPrerenders();
  prerender->WaitForStop();

  EXPECT_FALSE(prerender->contents());
}

// Prerendering and history tests.
// The prerendered page is navigated to in several ways [navigate via
// omnibox, click on link, key-modified click to open in background tab, etc],
// followed by a navigation to another page from the prerendered page, followed
// by a back navigation.

IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderNavigateClickGoBack) {
  PrerenderTestURL("files/prerender/prerender_page_with_link.html",
                   FINAL_STATUS_USED,
                   1);
  NavigateToDestURL();
  ClickToNextPageAfterPrerender();
  GoBackToPrerender();
}

IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderNavigateNavigateGoBack) {
  PrerenderTestURL("files/prerender/prerender_page_with_link.html",
                   FINAL_STATUS_USED,
                   1);
  NavigateToDestURL();
  NavigateToNextPageAfterPrerender();
  GoBackToPrerender();
}

IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderClickClickGoBack) {
  PrerenderTestURL("files/prerender/prerender_page_with_link.html",
                   FINAL_STATUS_USED,
                   1);
  OpenDestURLViaClick();
  ClickToNextPageAfterPrerender();
  GoBackToPrerender();
}

IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderClickNavigateGoBack) {
  PrerenderTestURL("files/prerender/prerender_page_with_link.html",
                   FINAL_STATUS_USED,
                   1);
  OpenDestURLViaClick();
  NavigateToNextPageAfterPrerender();
  GoBackToPrerender();
}

// http://crbug.com/345474
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest,
                       DISABLED_PrerenderClickNewWindow) {
  PrerenderTestURL("files/prerender/prerender_page_with_link.html",
                   FINAL_STATUS_WINDOW_OPENER,
                   1);
  OpenDestURLViaClickNewWindow();
}

// http://crbug.com/345474
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest,
                       DISABLED_PrerenderClickNewForegroundTab) {
  PrerenderTestURL("files/prerender/prerender_page_with_link.html",
                   FINAL_STATUS_WINDOW_OPENER,
                   1);
  OpenDestURLViaClickNewForegroundTab();
}

// http://crbug.com/345474
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest,
                       DISABLED_PrerenderClickNewBackgroundTab) {
  scoped_ptr<TestPrerender> prerender =
      PrerenderTestURL("files/prerender/prerender_page_with_link.html",
                       FINAL_STATUS_WINDOW_OPENER,
                       1);
  ASSERT_TRUE(prerender->contents());
  prerender->contents()->set_should_be_shown(false);
  OpenDestURLViaClickNewBackgroundTab();
}

IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest,
                       NavigateToPrerenderedPageWhenDevToolsAttached) {
  DisableJavascriptCalls();
  WebContents* web_contents =
      current_browser()->tab_strip_model()->GetActiveWebContents();
  scoped_refptr<DevToolsAgentHost> agent(DevToolsAgentHost::GetOrCreateFor(
      web_contents->GetRenderViewHost()));
  DevToolsManager* manager = DevToolsManager::GetInstance();
  FakeDevToolsClientHost client_host;
  manager->RegisterDevToolsClientHostFor(agent.get(), &client_host);
  const char* url = "files/prerender/prerender_page.html";
  PrerenderTestURL(url, FINAL_STATUS_DEVTOOLS_ATTACHED, 1);
  NavigateToURLWithDisposition(url, CURRENT_TAB, false);
  manager->ClientHostClosing(&client_host);
}

// Validate that the sessionStorage namespace remains the same when swapping
// in a prerendered page.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderSessionStorage) {
  set_loader_path("files/prerender/prerender_loader_with_session_storage.html");
  PrerenderTestURL(GetCrossDomainTestUrl("files/prerender/prerender_page.html"),
                   FINAL_STATUS_USED,
                   1);
  NavigateToDestURL();
  GoBackToPageBeforePrerender();
}

// Checks that the control group works.  An XHR PUT cannot be detected in the
// control group.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, ControlGroup) {
  RestorePrerenderMode restore_prerender_mode;
  PrerenderManager::SetMode(
      PrerenderManager::PRERENDER_MODE_EXPERIMENT_CONTROL_GROUP);
  DisableJavascriptCalls();
  PrerenderTestURL("files/prerender/prerender_xhr_put.html",
                   FINAL_STATUS_WOULD_HAVE_BEEN_USED, 0);
  NavigateToDestURL();
}

// Checks that the control group correctly hits WOULD_HAVE_BEEN_USED
// renderer-initiated navigations. (This verifies that the ShouldFork logic
// behaves correctly.)
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, ControlGroupRendererInitiated) {
  RestorePrerenderMode restore_prerender_mode;
  PrerenderManager::SetMode(
      PrerenderManager::PRERENDER_MODE_EXPERIMENT_CONTROL_GROUP);
  DisableJavascriptCalls();
  PrerenderTestURL("files/prerender/prerender_xhr_put.html",
                   FINAL_STATUS_WOULD_HAVE_BEEN_USED, 0);
  OpenDestURLViaClick();
}

// Make sure that the MatchComplete dummy works in the normal case.  Once
// a prerender is cancelled because of a script, a dummy must be created to
// account for the MatchComplete case, and it must have a final status of
// FINAL_STATUS_WOULD_HAVE_BEEN_USED.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, MatchCompleteDummy) {
  UMAHistogramHelper histograms;

  std::vector<FinalStatus> expected_final_status_queue;
  expected_final_status_queue.push_back(FINAL_STATUS_INVALID_HTTP_METHOD);
  expected_final_status_queue.push_back(FINAL_STATUS_WOULD_HAVE_BEEN_USED);
  PrerenderTestURL("files/prerender/prerender_xhr_put.html",
                   expected_final_status_queue, 1);
  histograms.Fetch();
  histograms.ExpectTotalCount("Prerender.none_PerceivedPLT", 1);
  histograms.ExpectTotalCount("Prerender.none_PerceivedPLTMatched", 0);
  histograms.ExpectTotalCount("Prerender.none_PerceivedPLTMatchedComplete", 0);
  histograms.ExpectTotalCount("Prerender.websame_PrerenderNotSwappedInPLT", 1);

  NavigateToDestURL();
  histograms.Fetch();
  histograms.ExpectTotalCount("Prerender.websame_PerceivedPLT", 1);
  histograms.ExpectTotalCount("Prerender.websame_PerceivedPLTMatched", 0);
  histograms.ExpectTotalCount(
      "Prerender.websame_PerceivedPLTMatchedComplete", 1);
}

// Verify that a navigation that hits a MatchComplete dummy while another is in
// progress does not also classify the previous navigation as a MatchComplete.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest,
                       MatchCompleteDummyCancelNavigation) {
  UMAHistogramHelper histograms;

  // Arrange for a URL to hang.
  const GURL kNoCommitUrl("http://never-respond.example.com");
  base::FilePath file(FILE_PATH_LITERAL(
      "chrome/test/data/prerender/prerender_page.html"));
  base::RunLoop hang_loop;
  BrowserThread::PostTask(
      BrowserThread::IO, FROM_HERE,
      base::Bind(&CreateHangingFirstRequestProtocolHandlerOnIO,
                 kNoCommitUrl, file, hang_loop.QuitClosure()));

  // First, fire a prerender that aborts after it completes its load.
  std::vector<FinalStatus> expected_final_status_queue;
  expected_final_status_queue.push_back(FINAL_STATUS_INVALID_HTTP_METHOD);
  expected_final_status_queue.push_back(FINAL_STATUS_WOULD_HAVE_BEEN_USED);
  PrerenderTestURL("files/prerender/prerender_xhr_put.html",
                   expected_final_status_queue, 1);
  histograms.Fetch();
  histograms.ExpectTotalCount("Prerender.none_PerceivedPLT", 1);
  histograms.ExpectTotalCount("Prerender.none_PerceivedPLTMatched", 0);
  histograms.ExpectTotalCount("Prerender.none_PerceivedPLTMatchedComplete", 0);
  histograms.ExpectTotalCount("Prerender.websame_PrerenderNotSwappedInPLT", 1);

  // Open the hanging URL in a new tab. Wait for both the new tab to open and
  // the hanging request to be scheduled.
  ui_test_utils::NavigateToURLWithDisposition(
      current_browser(), kNoCommitUrl, NEW_FOREGROUND_TAB,
      ui_test_utils::BROWSER_TEST_WAIT_FOR_TAB);
  hang_loop.Run();

  // Now interrupt that navigation and navigate to the destination URL. This
  // should forcibly complete the previous navigation and also complete a
  // WOULD_HAVE_BEEN_PRERENDERED navigation.
  NavigateToDestURL();
  histograms.Fetch();
  histograms.ExpectTotalCount("Prerender.none_PerceivedPLT", 2);
  histograms.ExpectTotalCount("Prerender.none_PerceivedPLTMatched", 0);
  histograms.ExpectTotalCount("Prerender.none_PerceivedPLTMatchedComplete", 0);
  histograms.ExpectTotalCount("Prerender.websame_PerceivedPLT", 1);
  histograms.ExpectTotalCount("Prerender.websame_PerceivedPLTMatched", 0);
  histograms.ExpectTotalCount(
      "Prerender.websame_PerceivedPLTMatchedComplete", 1);
}

class PrerenderBrowserTestWithNaCl : public PrerenderBrowserTest {
 public:
  PrerenderBrowserTestWithNaCl() {}
  virtual ~PrerenderBrowserTestWithNaCl() {}

  virtual void SetUpCommandLine(CommandLine* command_line) OVERRIDE {
    PrerenderBrowserTest::SetUpCommandLine(command_line);
    command_line->AppendSwitch(switches::kEnableNaCl);
  }
};

// Check that NaCl plugins work when enabled, with prerendering.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTestWithNaCl,
                       PrerenderNaClPluginEnabled) {
#if defined(OS_WIN) && defined(USE_ASH)
  // Disable this test in Metro+Ash for now (http://crbug.com/262796).
  if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kAshBrowserTests))
    return;
#endif

  PrerenderTestURL("files/prerender/prerender_plugin_nacl_enabled.html",
                   FINAL_STATUS_USED,
                   1);
  NavigateToDestURL();

  // To avoid any chance of a race, we have to let the script send its response
  // asynchronously.
  WebContents* web_contents =
      browser()->tab_strip_model()->GetActiveWebContents();
  bool display_test_result = false;
  ASSERT_TRUE(content::ExecuteScriptAndExtractBool(web_contents,
                                                   "DidDisplayReallyPass()",
                                                   &display_test_result));
  ASSERT_TRUE(display_test_result);
}

// Checks that the referrer policy is used when prerendering.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderReferrerPolicy) {
  set_loader_path("files/prerender/prerender_loader_with_referrer_policy.html");
  PrerenderTestURL("files/prerender/prerender_referrer_policy.html",
                   FINAL_STATUS_USED,
                   1);
  NavigateToDestURL();
}

// Checks that the referrer policy is used when prerendering on HTTPS.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest,
                       PrerenderSSLReferrerPolicy) {
  UseHttpsSrcServer();
  set_loader_path("files/prerender/prerender_loader_with_referrer_policy.html");
  PrerenderTestURL("files/prerender/prerender_referrer_policy.html",
                   FINAL_STATUS_USED,
                   1);
  NavigateToDestURL();
}

// Checks that the referrer policy is used when prerendering is cancelled.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderCancelReferrerPolicy) {
  scoped_ptr<TestContentBrowserClient> test_content_browser_client(
      new TestContentBrowserClient);
  content::ContentBrowserClient* original_browser_client =
      content::SetBrowserClientForTesting(test_content_browser_client.get());

  set_loader_path("files/prerender/prerender_loader_with_referrer_policy.html");
  PrerenderTestURL("files/prerender/prerender_referrer_policy.html",
                   FINAL_STATUS_CANCELLED,
                   1);
  OpenDestURLViaClick();

  bool display_test_result = false;
  WebContents* web_contents =
      browser()->tab_strip_model()->GetActiveWebContents();
  ASSERT_TRUE(content::ExecuteScriptAndExtractBool(
      web_contents,
      "window.domAutomationController.send(DidDisplayPass())",
      &display_test_result));
  EXPECT_TRUE(display_test_result);

  content::SetBrowserClientForTesting(original_browser_client);
}

// Test interaction of the webNavigation and tabs API with prerender.
class PrerenderBrowserTestWithExtensions : public PrerenderBrowserTest,
                                           public ExtensionApiTest {
 public:
  PrerenderBrowserTestWithExtensions() {
    // The individual tests start the test server through ExtensionApiTest, so
    // the port number can be passed through to the extension.
    autostart_test_server_ = false;
  }

  virtual void SetUp() OVERRIDE {
    PrerenderBrowserTest::SetUp();
  }

  virtual void SetUpCommandLine(CommandLine* command_line) OVERRIDE {
    PrerenderBrowserTest::SetUpCommandLine(command_line);
    ExtensionApiTest::SetUpCommandLine(command_line);
  }

  virtual void SetUpInProcessBrowserTestFixture() OVERRIDE {
    PrerenderBrowserTest::SetUpInProcessBrowserTestFixture();
    ExtensionApiTest::SetUpInProcessBrowserTestFixture();
  }

  virtual void TearDownInProcessBrowserTestFixture() OVERRIDE {
    PrerenderBrowserTest::TearDownInProcessBrowserTestFixture();
    ExtensionApiTest::TearDownInProcessBrowserTestFixture();
  }

  virtual void SetUpOnMainThread() OVERRIDE {
    PrerenderBrowserTest::SetUpOnMainThread();
  }
};

IN_PROC_BROWSER_TEST_F(PrerenderBrowserTestWithExtensions, WebNavigation) {
  ASSERT_TRUE(StartSpawnedTestServer());
  extensions::FrameNavigationState::set_allow_extension_scheme(true);

  CommandLine::ForCurrentProcess()->AppendSwitch(
      extensions::switches::kAllowLegacyExtensionManifests);

  // Wait for the extension to set itself up and return control to us.
  ASSERT_TRUE(RunExtensionTest("webnavigation/prerender")) << message_;

  ResultCatcher catcher;

  PrerenderTestURL("files/prerender/prerender_page.html", FINAL_STATUS_USED, 1);

  ChannelDestructionWatcher channel_close_watcher;
  channel_close_watcher.WatchChannel(browser()->tab_strip_model()->
      GetActiveWebContents()->GetRenderProcessHost());
  NavigateToDestURL();
  channel_close_watcher.WaitForChannelClose();

  ASSERT_TRUE(IsEmptyPrerenderLinkManager());
  ASSERT_TRUE(catcher.GetNextResult()) << catcher.message();
}

// Fails often on Windows dbg bots. http://crbug.com/177163
#if defined(OS_WIN) && !defined(NDEBUG)
#define MAYBE_TabsApi DISABLED_TabsApi
#else
#define MAYBE_TabsApi TabsApi
#endif  // defined(OS_WIN) && !defined(NDEBUG)
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTestWithExtensions, MAYBE_TabsApi) {
  ASSERT_TRUE(StartSpawnedTestServer());
  extensions::FrameNavigationState::set_allow_extension_scheme(true);

  // Wait for the extension to set itself up and return control to us.
  ASSERT_TRUE(RunExtensionSubtest("tabs/on_replaced", "on_replaced.html"))
      << message_;

  ResultCatcher catcher;

  PrerenderTestURL("files/prerender/prerender_page.html", FINAL_STATUS_USED, 1);

  ChannelDestructionWatcher channel_close_watcher;
  channel_close_watcher.WatchChannel(browser()->tab_strip_model()->
      GetActiveWebContents()->GetRenderProcessHost());
  NavigateToDestURL();
  channel_close_watcher.WaitForChannelClose();

  ASSERT_TRUE(IsEmptyPrerenderLinkManager());
  ASSERT_TRUE(catcher.GetNextResult()) << catcher.message();
}

// Test that prerenders abort when navigating to a stream.
// See chrome/browser/extensions/api/streams_private/streams_private_apitest.cc
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTestWithExtensions, StreamsTest) {
  ASSERT_TRUE(StartSpawnedTestServer());

  const extensions::Extension* extension = LoadExtension(
      test_data_dir_.AppendASCII("streams_private/handle_mime_type"));
  ASSERT_TRUE(extension);
  EXPECT_EQ(std::string(extension_misc::kStreamsPrivateTestExtensionId),
            extension->id());
  MimeTypesHandler* handler = MimeTypesHandler::GetHandler(extension);
  ASSERT_TRUE(handler);
  EXPECT_TRUE(handler->CanHandleMIMEType("application/msword"));

  PrerenderTestURL("files/prerender/document.doc", FINAL_STATUS_DOWNLOAD, 0);

  // Sanity-check that the extension would have picked up the stream in a normal
  // navigation had prerender not intercepted it.
  // streams_private/handle_mime_type reports success if it has handled the
  // application/msword type.
  ResultCatcher catcher;
  NavigateToDestURL();
  EXPECT_TRUE(catcher.GetNextResult());
}

// Checks that non-http/https/chrome-extension subresource cancels the
// prerender.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest,
                       PrerenderCancelSubresourceUnsupportedScheme) {
  GURL image_url = GURL("invalidscheme://www.google.com/test.jpg");
  std::vector<net::SpawnedTestServer::StringPair> replacement_text;
  replacement_text.push_back(
      std::make_pair("REPLACE_WITH_IMAGE_URL", image_url.spec()));
  std::string replacement_path;
  ASSERT_TRUE(net::SpawnedTestServer::GetFilePathWithReplacements(
      "files/prerender/prerender_with_image.html",
      replacement_text,
      &replacement_path));
  PrerenderTestURL(replacement_path, FINAL_STATUS_UNSUPPORTED_SCHEME, 0);
}

// Ensure that about:blank is permitted for any subresource.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest,
                       PrerenderAllowAboutBlankSubresource) {
  GURL image_url = GURL("about:blank");
  std::vector<net::SpawnedTestServer::StringPair> replacement_text;
  replacement_text.push_back(
      std::make_pair("REPLACE_WITH_IMAGE_URL", image_url.spec()));
  std::string replacement_path;
  ASSERT_TRUE(net::SpawnedTestServer::GetFilePathWithReplacements(
      "files/prerender/prerender_with_image.html",
      replacement_text,
      &replacement_path));
  PrerenderTestURL(replacement_path, FINAL_STATUS_USED, 1);
  NavigateToDestURL();
}

// Checks that non-http/https/chrome-extension subresource cancels the prerender
// on redirect.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest,
                       PrerenderCancelSubresourceRedirectUnsupportedScheme) {
  GURL image_url = test_server()->GetURL(
      CreateServerRedirect("invalidscheme://www.google.com/test.jpg"));
  std::vector<net::SpawnedTestServer::StringPair> replacement_text;
  replacement_text.push_back(
      std::make_pair("REPLACE_WITH_IMAGE_URL", image_url.spec()));
  std::string replacement_path;
  ASSERT_TRUE(net::SpawnedTestServer::GetFilePathWithReplacements(
      "files/prerender/prerender_with_image.html",
      replacement_text,
      &replacement_path));
  PrerenderTestURL(replacement_path, FINAL_STATUS_UNSUPPORTED_SCHEME, 0);
}

// Checks that chrome-extension subresource does not cancel the prerender.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest,
                       PrerenderKeepSubresourceExtensionScheme) {
  GURL image_url = GURL("chrome-extension://abcdefg/test.jpg");
  std::vector<net::SpawnedTestServer::StringPair> replacement_text;
  replacement_text.push_back(
      std::make_pair("REPLACE_WITH_IMAGE_URL", image_url.spec()));
  std::string replacement_path;
  ASSERT_TRUE(net::SpawnedTestServer::GetFilePathWithReplacements(
      "files/prerender/prerender_with_image.html",
      replacement_text,
      &replacement_path));
  PrerenderTestURL(replacement_path, FINAL_STATUS_USED, 1);
  NavigateToDestURL();
}

// Checks that redirect to chrome-extension subresource does not cancel the
// prerender.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest,
                       PrerenderKeepSubresourceRedirectExtensionScheme) {
  GURL image_url = test_server()->GetURL(
      CreateServerRedirect("chrome-extension://abcdefg/test.jpg"));
  std::vector<net::SpawnedTestServer::StringPair> replacement_text;
  replacement_text.push_back(
      std::make_pair("REPLACE_WITH_IMAGE_URL", image_url.spec()));
  std::string replacement_path;
  ASSERT_TRUE(net::SpawnedTestServer::GetFilePathWithReplacements(
      "files/prerender/prerender_with_image.html",
      replacement_text,
      &replacement_path));
  PrerenderTestURL(replacement_path, FINAL_STATUS_USED, 1);
  NavigateToDestURL();
}

// Checks that non-http/https main page redirects cancel the prerender.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest,
                       PrerenderCancelMainFrameRedirectUnsupportedScheme) {
  GURL url = test_server()->GetURL(
      CreateServerRedirect("invalidscheme://www.google.com/test.html"));
  PrerenderTestURL(url, FINAL_STATUS_UNSUPPORTED_SCHEME, 0);
}

// Checks that media source video loads are deferred on prerendering.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderHTML5MediaSourceVideo) {
  PrerenderTestURL("files/prerender/prerender_html5_video_media_source.html",
                   FINAL_STATUS_USED,
                   1);
  NavigateToDestURL();
  WaitForASCIITitle(GetActiveWebContents(), kPassTitle);
}

// Checks that a prerender that creates an audio stream (via a WebAudioDevice)
// is cancelled.
// http://crbug.com/261489
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, DISABLED_PrerenderWebAudioDevice) {
  PrerenderTestURL("files/prerender/prerender_web_audio_device.html",
                   FINAL_STATUS_CREATING_AUDIO_STREAM, 1);
}

// Checks that prerenders do not swap in to WebContents being captured.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderCapturedWebContents) {
  PrerenderTestURL("files/prerender/prerender_page.html",
                   FINAL_STATUS_PAGE_BEING_CAPTURED, 1);
  WebContents* web_contents = GetActiveWebContents();
  web_contents->IncrementCapturerCount(gfx::Size());
  NavigateToDestURLWithDisposition(CURRENT_TAB, false);
  web_contents->DecrementCapturerCount();
}

// Checks that prerenders are aborted on cross-process navigation from
// a server redirect.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest,
                       PrerenderCrossProcessServerRedirect) {
  // Force everything to be a process swap.
  SwapProcessesContentBrowserClient test_browser_client;
  content::ContentBrowserClient* original_browser_client =
      content::SetBrowserClientForTesting(&test_browser_client);

  PrerenderTestURL(
      CreateServerRedirect("files/prerender/prerender_page.html"),
      FINAL_STATUS_OPEN_URL, 0);

  content::SetBrowserClientForTesting(original_browser_client);
}

// Checks that URLRequests for prerenders being aborted on cross-process
// navigation from a server redirect are cleaned up, so they don't keep cache
// entries locked.
// See http://crbug.com/341134
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest,
                       PrerenderCrossProcessServerRedirectNoHang) {
  const char kDestPath[] = "files/prerender/prerender_page.html";
  // Force everything to be a process swap.
  SwapProcessesContentBrowserClient test_browser_client;
  content::ContentBrowserClient* original_browser_client =
      content::SetBrowserClientForTesting(&test_browser_client);

  PrerenderTestURL(CreateServerRedirect(kDestPath), FINAL_STATUS_OPEN_URL, 0);

  ui_test_utils::NavigateToURL(
      browser(),
      test_server()->GetURL(kDestPath));

  content::SetBrowserClientForTesting(original_browser_client);
}

// Checks that prerenders are aborted on cross-process navigation from
// a client redirect.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest,
                       PrerenderCrossProcessClientRedirect) {
  // Cross-process navigation logic for renderer-initiated navigations
  // is partially controlled by the renderer, namely
  // ChromeContentRendererClient. This test instead relies on the Web
  // Store triggering such navigations.
  std::string webstore_url = extension_urls::GetWebstoreLaunchURL();

  // Mock out requests to the Web Store.
  base::FilePath file(GetTestPath("prerender_page.html"));
  BrowserThread::PostTask(
      BrowserThread::IO, FROM_HERE,
      base::Bind(&CreateMockProtocolHandlerOnIO,
                 GURL(webstore_url), file));

  PrerenderTestURL(CreateClientRedirect(webstore_url),
                   FINAL_STATUS_OPEN_URL, 1);
}

// Checks that canceling a MatchComplete dummy doesn't result in two
// stop events.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, CancelMatchCompleteDummy) {
  std::vector<FinalStatus> expected_final_status_queue;
  expected_final_status_queue.push_back(FINAL_STATUS_JAVASCRIPT_ALERT);
  expected_final_status_queue.push_back(FINAL_STATUS_CANCELLED);
  ScopedVector<TestPrerender> prerenders =
      PrerenderTestURL("files/prerender/prerender_alert_before_onload.html",
                       expected_final_status_queue, 0);

  // Cancel the MatchComplete dummy.
  GetPrerenderManager()->CancelAllPrerenders();
  prerenders[1]->WaitForStop();

  // Check the referring page only got one copy of the event.
  EXPECT_FALSE(HadPrerenderEventErrors());
}

// Checks that a deferred redirect to an image is not loaded until the page is
// visible. Also test the right histogram events are emitted in this case.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderDeferredImage) {
  DisableJavascriptCalls();
  UMAHistogramHelper histograms;

  // The prerender will not completely load until after the swap, so wait for a
  // title change before calling DidPrerenderPass.
  scoped_ptr<TestPrerender> prerender =
      PrerenderTestURL(
          "files/prerender/prerender_deferred_image.html",
          FINAL_STATUS_USED, 0);
  WaitForASCIITitle(prerender->contents()->prerender_contents(), kReadyTitle);
  EXPECT_EQ(1, GetPrerenderDomContentLoadedEventCountForLinkNumber(0));
  EXPECT_TRUE(DidPrerenderPass(prerender->contents()->prerender_contents()));
  EXPECT_EQ(0, prerender->number_of_loads());
  histograms.Fetch();
  histograms.ExpectTotalCount("Prerender.none_PerceivedPLT", 1);
  histograms.ExpectTotalCount("Prerender.none_PerceivedPLTMatched", 0);
  histograms.ExpectTotalCount("Prerender.none_PerceivedPLTMatchedComplete", 0);
  histograms.ExpectTotalCount("Prerender.websame_PrerenderNotSwappedInPLT", 0);

  // Swap.
  NavigationOrSwapObserver swap_observer(current_browser()->tab_strip_model(),
                                         GetActiveWebContents());
  ui_test_utils::NavigateToURLWithDisposition(
      current_browser(), dest_url(), CURRENT_TAB,
      ui_test_utils::BROWSER_TEST_NONE);
  swap_observer.Wait();

  // The prerender never observes the final load.
  EXPECT_EQ(0, prerender->number_of_loads());

  // Now check DidDisplayPass.
  EXPECT_TRUE(DidDisplayPass(GetActiveWebContents()));

  histograms.Fetch();
  histograms.ExpectTotalCount("Prerender.websame_PrerenderNotSwappedInPLT", 0);
  histograms.ExpectTotalCount("Prerender.websame_PerceivedPLT", 1);
  histograms.ExpectTotalCount("Prerender.websame_PerceivedPLTMatched", 1);
  histograms.ExpectTotalCount(
      "Prerender.websame_PerceivedPLTMatchedComplete", 1);
}

// Checks that a deferred redirect to an image is not loaded until the
// page is visible, even after another redirect.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest,
                       PrerenderDeferredImageAfterRedirect) {
  DisableJavascriptCalls();

  // The prerender will not completely load until after the swap, so wait for a
  // title change before calling DidPrerenderPass.
  scoped_ptr<TestPrerender> prerender =
      PrerenderTestURL(
          "files/prerender/prerender_deferred_image.html",
          FINAL_STATUS_USED, 0);
  WaitForASCIITitle(prerender->contents()->prerender_contents(), kReadyTitle);
  EXPECT_TRUE(DidPrerenderPass(prerender->contents()->prerender_contents()));
  EXPECT_EQ(0, prerender->number_of_loads());

  // Swap.
  NavigationOrSwapObserver swap_observer(current_browser()->tab_strip_model(),
                                         GetActiveWebContents());
  ui_test_utils::NavigateToURLWithDisposition(
      current_browser(), dest_url(), CURRENT_TAB,
      ui_test_utils::BROWSER_TEST_NONE);
  swap_observer.Wait();

  // The prerender never observes the final load.
  EXPECT_EQ(0, prerender->number_of_loads());

  // Now check DidDisplayPass.
  EXPECT_TRUE(DidDisplayPass(GetActiveWebContents()));
}

// Checks that deferred redirects in the main frame are followed.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderDeferredMainFrame) {
  DisableJavascriptCalls();
  PrerenderTestURL(
      "files/prerender/image-deferred.png",
      FINAL_STATUS_USED, 1);
  NavigateToDestURL();
}

// Checks that deferred redirects in the main frame are followed, even
// with a double-redirect.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest,
                       PrerenderDeferredMainFrameAfterRedirect) {
  DisableJavascriptCalls();
  PrerenderTestURL(
      CreateServerRedirect("files/prerender/image-deferred.png"),
      FINAL_STATUS_USED, 1);
  NavigateToDestURL();
}

// Checks that deferred redirects in a synchronous XHR abort the
// prerender.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderDeferredSynchronousXHR) {
  PrerenderTestURL("files/prerender/prerender_deferred_sync_xhr.html",
                   FINAL_STATUS_BAD_DEFERRED_REDIRECT, 0);
  NavigateToDestURL();
}

// Checks that prerenders are not swapped for navigations with extra headers.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderExtraHeadersNoSwap) {
  PrerenderTestURL("files/prerender/prerender_page.html",
                   FINAL_STATUS_APP_TERMINATING, 1);

  content::OpenURLParams params(dest_url(), Referrer(), CURRENT_TAB,
                                content::PAGE_TRANSITION_TYPED, false);
  params.extra_headers = "X-Custom-Header: 42\r\n";
  NavigateToURLWithParams(params, false);
}

// Checks that prerenders are not swapped for navigations with browser-initiated
// POST data.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest,
                       PrerenderBrowserInitiatedPostNoSwap) {
  PrerenderTestURL("files/prerender/prerender_page.html",
                   FINAL_STATUS_APP_TERMINATING, 1);

  std::string post_data = "DATA";
  content::OpenURLParams params(dest_url(), Referrer(), CURRENT_TAB,
                                content::PAGE_TRANSITION_TYPED, false);
  params.uses_post = true;
  params.browser_initiated_post_data =
      base::RefCountedString::TakeString(&post_data);
  NavigateToURLWithParams(params, false);
}

// Checks that the prerendering of a page is canceled correctly when the
// prerendered page tries to make a second navigation entry.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderNewNavigationEntry) {
  PrerenderTestURL("files/prerender/prerender_new_entry.html",
                   FINAL_STATUS_NEW_NAVIGATION_ENTRY,
                   1);
}

// Attempt a swap-in in a new tab, verifying that session storage namespace
// merging works.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderPageNewTab) {
  // Mock out some URLs and count the number of requests to one of them. Both
  // prerender_session_storage.html and init_session_storage.html need to be
  // mocked so they are same-origin.
  const GURL kInitURL("http://prerender.test/init_session_storage.html");
  base::FilePath init_file = GetTestPath("init_session_storage.html");
  BrowserThread::PostTask(
      BrowserThread::IO, FROM_HERE,
      base::Bind(&CreateMockProtocolHandlerOnIO, kInitURL, init_file));

  const GURL kTestURL("http://prerender.test/prerender_session_storage.html");
  base::FilePath test_file = GetTestPath("prerender_session_storage.html");
  RequestCounter counter;
  BrowserThread::PostTask(
      BrowserThread::IO, FROM_HERE,
      base::Bind(&CreateCountingProtocolHandlerOnIO,
                 kTestURL, test_file, counter.AsWeakPtr()));

  PrerenderTestURL(kTestURL, FINAL_STATUS_USED, 1);

  // Open a new tab to navigate in.
  ui_test_utils::NavigateToURLWithDisposition(
      current_browser(), kInitURL, NEW_FOREGROUND_TAB,
      ui_test_utils::BROWSER_TEST_WAIT_FOR_NAVIGATION);

  // Now navigate in the new tab. Set expect_swap_to_succeed to false because
  // the swap does not occur synchronously.
  //
  // TODO(davidben): When all swaps become asynchronous, remove the OpenURL
  // return value assertion and let this go through the usual successful-swap
  // codepath.
  NavigateToDestURLWithDisposition(CURRENT_TAB, false);

  // Verify DidDisplayPass manually since the previous call skipped it.
  EXPECT_TRUE(DidDisplayPass(
      current_browser()->tab_strip_model()->GetActiveWebContents()));

  // Only one request to the test URL started.
  //
  // TODO(davidben): Re-enable this check when the races in attaching the
  // throttle are resolved. http://crbug.com/335835
  // EXPECT_EQ(1, counter.count());
}

// Attempt a swap-in in a new tab, verifying that session storage namespace
// merging works. Unlike the above test, the swap is for a navigation that would
// normally be cross-process.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderPageNewTabCrossProcess) {
  base::FilePath test_data_dir;
  ASSERT_TRUE(PathService::Get(chrome::DIR_TEST_DATA, &test_data_dir));

  // Mock out some URLs and count the number of requests to one of them. Both
  // prerender_session_storage.html and init_session_storage.html need to be
  // mocked so they are same-origin.
  const GURL kInitURL("http://prerender.test/init_session_storage.html");
  base::FilePath init_file = GetTestPath("init_session_storage.html");
  BrowserThread::PostTask(
      BrowserThread::IO, FROM_HERE,
      base::Bind(&CreateMockProtocolHandlerOnIO, kInitURL, init_file));

  const GURL kTestURL("http://prerender.test/prerender_session_storage.html");
  base::FilePath test_file = GetTestPath("prerender_session_storage.html");
  RequestCounter counter;
  BrowserThread::PostTask(
      BrowserThread::IO, FROM_HERE,
      base::Bind(&CreateCountingProtocolHandlerOnIO,
                 kTestURL, test_file, counter.AsWeakPtr()));

  PrerenderTestURL(kTestURL, FINAL_STATUS_USED, 1);

  // Open a new tab to navigate in.
  ui_test_utils::NavigateToURLWithDisposition(
      current_browser(), kInitURL, NEW_FOREGROUND_TAB,
      ui_test_utils::BROWSER_TEST_WAIT_FOR_NAVIGATION);

  // Navigate to about:blank so the next navigation is cross-process.
  ui_test_utils::NavigateToURL(current_browser(),
                               GURL(content::kAboutBlankURL));

  // Now navigate in the new tab. Set expect_swap_to_succeed to false because
  // the swap does not occur synchronously.
  //
  // TODO(davidben): When all swaps become asynchronous, remove the OpenURL
  // return value assertion and let this go through the usual successful-swap
  // codepath.
  NavigateToDestURLWithDisposition(CURRENT_TAB, false);

  // Verify DidDisplayPass manually since the previous call skipped it.
  EXPECT_TRUE(DidDisplayPass(GetActiveWebContents()));

  // Only one request to the test URL started.
  //
  // TODO(davidben): Re-enable this check when the races in attaching the
  // throttle are resolved. http://crbug.com/335835
  // EXPECT_EQ(1, counter.count());
}

// Verify that session storage conflicts don't merge.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderSessionStorageConflict) {
  PrerenderTestURL("files/prerender/prerender_session_storage_conflict.html",
                   FINAL_STATUS_APP_TERMINATING, 1);

  // Open a new tab to navigate in.
  ui_test_utils::NavigateToURLWithDisposition(
      current_browser(),
      test_server()->GetURL("files/prerender/init_session_storage.html"),
      NEW_FOREGROUND_TAB,
      ui_test_utils::BROWSER_TEST_WAIT_FOR_NAVIGATION);

  // Now navigate in the new tab.
  NavigateToDestURLWithDisposition(CURRENT_TAB, false);

  // Verify DidDisplayPass in the new tab.
  EXPECT_TRUE(DidDisplayPass(GetActiveWebContents()));
}

// Checks that prerenders honor |should_replace_current_entry|.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderReplaceCurrentEntry) {
  PrerenderTestURL("files/prerender/prerender_page.html", FINAL_STATUS_USED, 1);

  content::OpenURLParams params(dest_url(), Referrer(), CURRENT_TAB,
                                content::PAGE_TRANSITION_TYPED, false);
  params.should_replace_current_entry = true;
  NavigateToURLWithParams(params, false);

  const NavigationController& controller =
      GetActiveWebContents()->GetController();
  // First entry is about:blank, second is prerender_page.html.
  EXPECT_TRUE(controller.GetPendingEntry() == NULL);
  EXPECT_EQ(2, controller.GetEntryCount());
  EXPECT_EQ(GURL(content::kAboutBlankURL),
            controller.GetEntryAtIndex(0)->GetURL());
  EXPECT_EQ(dest_url(), controller.GetEntryAtIndex(1)->GetURL());
}

// Checks prerender does not hit DCHECKs and behaves properly if two pending
// swaps occur in a row.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderDoublePendingSwap) {
  GetPrerenderManager()->mutable_config().max_link_concurrency = 2;
  GetPrerenderManager()->mutable_config().max_link_concurrency_per_launcher = 2;

  GURL url1 = test_server()->GetURL("files/prerender/prerender_page.html?1");
  scoped_ptr<TestPrerender> prerender1 =
      PrerenderTestURL(url1, FINAL_STATUS_APP_TERMINATING, 1);

  GURL url2 = test_server()->GetURL("files/prerender/prerender_page.html?2");
  scoped_ptr<TestPrerender> prerender2 = ExpectPrerender(FINAL_STATUS_USED);
  AddPrerender(url2, 1);
  prerender2->WaitForStart();
  prerender2->WaitForLoads(1);

  // There's no reason the second prerender can't be used, but the swap races
  // with didStartProvisionalLoad and didFailProvisionalLoad from the previous
  // navigation. The current logic will conservatively fail to swap under such
  // races. However, if the renderer is slow enough, it's possible for the
  // prerender to still be used, so don't program in either expectation.
  ASSERT_TRUE(prerender2->contents());
  prerender2->contents()->set_skip_final_checks(true);

  // Open a new tab to navigate in.
  ui_test_utils::NavigateToURLWithDisposition(
      current_browser(), GURL(content::kAboutBlankURL), NEW_FOREGROUND_TAB,
      ui_test_utils::BROWSER_TEST_WAIT_FOR_NAVIGATION);

  // Fire off two navigations, without running the event loop between them.
  NavigationOrSwapObserver swap_observer(
      current_browser()->tab_strip_model(),
      GetActiveWebContents(), 2);
  current_browser()->OpenURL(OpenURLParams(
      url1, Referrer(), CURRENT_TAB, content::PAGE_TRANSITION_TYPED, false));
  current_browser()->OpenURL(OpenURLParams(
      url2, Referrer(), CURRENT_TAB, content::PAGE_TRANSITION_TYPED, false));
  swap_observer.Wait();

  // The WebContents should be on url2. There may be 2 or 3 entries, depending
  // on whether the first one managed to complete.
  //
  // TODO(davidben): When http://crbug.com/335835 is fixed, the 3 entry case
  // shouldn't be possible because it's throttled by the pending swap that
  // cannot complete.
  const NavigationController& controller =
      GetActiveWebContents()->GetController();
  EXPECT_TRUE(controller.GetPendingEntry() == NULL);
  EXPECT_LE(2, controller.GetEntryCount());
  EXPECT_GE(3, controller.GetEntryCount());
  EXPECT_EQ(GURL(content::kAboutBlankURL),
            controller.GetEntryAtIndex(0)->GetURL());
  EXPECT_EQ(url2, controller.GetEntryAtIndex(
      controller.GetEntryCount() - 1)->GetURL());
}

// Verify that pending swaps get aborted on new navigations.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest,
                       PrerenderPendingSwapNewNavigation) {
  PrerenderManager::HangSessionStorageMergesForTesting();

  PrerenderTestURL("files/prerender/prerender_page.html",
                   FINAL_STATUS_APP_TERMINATING, 1);

  // Open a new tab to navigate in.
  ui_test_utils::NavigateToURLWithDisposition(
      current_browser(), GURL(content::kAboutBlankURL), NEW_FOREGROUND_TAB,
      ui_test_utils::BROWSER_TEST_WAIT_FOR_NAVIGATION);

  // Navigate to the URL. Wait for DidStartLoading, just so it's definitely
  // progressed somewhere.
  content::WindowedNotificationObserver page_load_observer(
      content::NOTIFICATION_LOAD_START,
      content::Source<NavigationController>(
          &GetActiveWebContents()->GetController()));
  current_browser()->OpenURL(OpenURLParams(
      dest_url(), Referrer(), CURRENT_TAB,
      content::PAGE_TRANSITION_TYPED, false));
  page_load_observer.Wait();

  // Navigate somewhere else. This should succeed and abort the pending swap.
  TestNavigationObserver nav_observer(GetActiveWebContents());
  current_browser()->OpenURL(OpenURLParams(
      GURL(content::kAboutBlankURL), Referrer(), CURRENT_TAB,
      content::PAGE_TRANSITION_TYPED, false));
  nav_observer.Wait();
}

// Checks that <a ping> requests are not dropped in prerender.
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderPing) {
  // Count hits to a certain URL.
  const GURL kPingURL("http://prerender.test/ping");
  base::FilePath empty_file = ui_test_utils::GetTestFilePath(
      base::FilePath(), base::FilePath(FILE_PATH_LITERAL("empty.html")));
  RequestCounter ping_counter;
  BrowserThread::PostTask(
      BrowserThread::IO, FROM_HERE,
      base::Bind(&CreateCountingProtocolHandlerOnIO,
                 kPingURL, empty_file, ping_counter.AsWeakPtr()));

  PrerenderTestURL("files/prerender/prerender_page.html", FINAL_STATUS_USED, 1);
  OpenDestURLViaClickPing(kPingURL);

  ping_counter.WaitForCount(1);
}

IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, PrerenderPPLTNormalNavigation) {
  UMAHistogramHelper histograms;

  GURL url = test_server()->GetURL("files/prerender/prerender_page.html");
  ui_test_utils::NavigateToURL(current_browser(), url);
  histograms.Fetch();
  histograms.ExpectTotalCount("Prerender.none_PerceivedPLT", 1);
  histograms.ExpectTotalCount("Prerender.none_PerceivedPLTMatched", 0);
  histograms.ExpectTotalCount("Prerender.none_PerceivedPLTMatchedComplete", 0);
}

class PrerenderIncognitoBrowserTest : public PrerenderBrowserTest {
 public:
  virtual void SetUpOnMainThread() OVERRIDE {
    Profile* normal_profile = current_browser()->profile();
    set_browser(ui_test_utils::OpenURLOffTheRecord(
        normal_profile, GURL("about:blank")));
    PrerenderBrowserTest::SetUpOnMainThread();
  }
};

// Checks that prerendering works in incognito mode.
IN_PROC_BROWSER_TEST_F(PrerenderIncognitoBrowserTest, PrerenderIncognito) {
  PrerenderTestURL("files/prerender/prerender_page.html", FINAL_STATUS_USED, 1);
  NavigateToDestURL();
}

}  // namespace prerender