root/content/browser/web_contents/web_contents_impl.cc

DEFINITIONS

1. StartDownload
2. NotifyCacheOnIO
3. CollectSites
4. ForEachFrameInternal
5. ForEachPendingFrameInternal
6. SendToAllFramesInternal
7. RunRenderFrameDeleted
8. Create
9. CreateWithSessionStorage
10. AddCreatedCallback
11. RemoveCreatedCallback
12. FromRenderViewHost
13. FromRenderFrameHost
14. owner_
15. WebContentsDestroyed
16. is_subframe_
17. CreateWithOpener
18. CreateGuest
19. GetRenderManagerForTesting
20. OnMessageReceived
21. OnMessageReceived
22. RunFileChooser
23. GetController
24. GetController
25. GetBrowserContext
26. GetURL
27. GetVisibleURL
28. GetLastCommittedURL
29. GetDelegate
30. SetDelegate
31. GetRenderProcessHost
32. GetMainFrame
33. GetFocusedFrame
34. ForEachFrame
35. SendToAllFrames
36. GetRenderViewHost
37. GetEmbedderWebContents
38. GetEmbeddedInstanceID
39. GetRoutingID
40. GetFullscreenWidgetRoutingID
41. GetRenderWidgetHostView
42. GetRenderWidgetHostViewPort
43. GetFullscreenRenderWidgetHostView
44. GetView
45. CreateWebUI
46. GetWebUI
47. GetCommittedWebUI
48. SetUserAgentOverride
49. GetUserAgentOverride
50. SetParentNativeViewAccessible
51. GetTitle
52. GetMaxPageID
53. GetMaxPageIDForSiteInstance
54. UpdateMaxPageID
55. UpdateMaxPageIDForSiteInstance
56. CopyMaxPageIDsFrom
57. GetSiteInstance
58. GetPendingSiteInstance
59. IsLoading
60. IsWaitingForResponse
61. GetLoadState
62. GetLoadStateHost
63. GetUploadSize
64. GetUploadPosition
65. GetSitesInTab
66. GetEncoding
67. DisplayedInsecureContent
68. IncrementCapturerCount
69. DecrementCapturerCount
70. GetCapturerCount
71. IsCrashed
72. SetIsCrashed
73. GetCrashedStatus
74. IsBeingDestroyed
75. NotifyNavigationStateChanged
76. GetLastActiveTime
77. WasShown
78. WasHidden
79. NeedToFireBeforeUnload
80. Stop
81. Clone
82. Observe
83. GetWebContents
84. Init
85. OnWebContentsDestroyed
86. AddDestructionObserver
87. RemoveDestructionObserver
88. AddObserver
89. RemoveObserver
90. Activate
91. Deactivate
92. LostCapture
93. RenderWidgetDeleted
94. PreHandleKeyboardEvent
95. HandleKeyboardEvent
96. HandleWheelEvent
97. PreHandleGestureEvent
98. HandleGestureEvent
99. GetParentNativeViewAccessible
100. HandleMouseDown
101. HandleMouseUp
102. HandlePointerActivate
103. HandleGestureBegin
104. HandleGestureEnd
105. ToggleFullscreenMode
106. IsFullscreenForCurrentTab
107. RequestToLockMouse
108. LostMouseLock
109. CreateNewWindow
110. CreateNewWidget
111. CreateNewFullscreenWidget
112. CreateNewWidget
113. ShowCreatedWindow
114. ShowCreatedWidget
115. ShowCreatedFullscreenWidget
116. ShowCreatedWidget
117. GetCreatedWindow
118. GetCreatedWidget
119. RequestMediaAccessPermission
120. GetSessionStorageNamespace
121. GetFrameTree
122. AccessibilityEventReceived
123. OnShowValidationMessage
124. OnHideValidationMessage
125. OnMoveValidationMessage
126. DidSendScreenRects
127. UpdatePreferredSize
128. ResizeDueToAutoResize
129. OpenURL
130. Send
131. NavigateToPendingEntry
132. RenderFrameForInterstitialPageCreated
133. AttachInterstitialPage
134. DetachInterstitialPage
135. SetHistoryLengthAndPrune
136. ReloadFocusedFrame
137. Replace
138. ReplaceMisspelling
139. FocusThroughTabTraversal
140. ShowingInterstitialPage
141. GetInterstitialPage
142. IsSavable
143. OnSavePage
144. SavePage
145. SaveFrame
146. GenerateMHTML
147. IsActiveEntry
148. GetContentsMimeType
149. WillNotifyDisconnection
150. SetOverrideEncoding
151. ResetOverrideEncoding
152. GetMutableRendererPrefs
153. Close
154. DragSourceEndedAt
155. DidGetResourceResponseStart
156. DidGetRedirectForResourceRequest
157. SystemDragEnded
158. UserGestureDone
159. SetClosedByUserGesture
160. GetClosedByUserGesture
161. GetZoomLevel
162. GetZoomPercent
163. ViewSource
164. ViewFrameSource
165. GetMinimumZoomPercent
166. GetMaximumZoomPercent
167. GetPreferredSize
168. GotResponseToLockMouseRequest
169. HasOpener
170. DidChooseColorInColorChooser
171. DidEndColorChooser
172. DownloadImage
173. IsSubframe
174. SetZoomLevel
175. Find
176. StopFinding
177. FocusLocationBarByDefault
178. SetFocusToLocationBar
179. DidStartProvisionalLoad
180. DidFailProvisionalLoadWithError
181. DidFailLoadWithError
182. NotifyChangedNavigationState
183. AboutToNavigateRenderFrame
184. DidStartNavigationToPendingEntry
185. RequestOpenURL
186. DidRedirectProvisionalLoad
187. DidCommitProvisionalLoad
188. DidNavigateMainFramePreCommit
189. DidNavigateMainFramePostCommit
190. DidNavigateAnyFramePostCommit
191. SetMainFrameMimeType
192. CanOverscrollContent
193. OnDidLoadResourceFromMemoryCache
194. OnDidDisplayInsecureContent
195. OnDidRunInsecureContent
196. OnDocumentLoadedInFrame
197. OnDidFinishLoad
198. OnGoToEntryAtOffset
199. OnUpdateZoomLimits
200. OnEnumerateDirectory
201. OnRegisterProtocolHandler
202. OnFindReply
203. OnFindMatchRectsReply
204. OnOpenDateTimeDialog
205. OnJavaBridgeGetChannelHandle
206. OnPepperPluginHung
207. OnPluginCrashed
208. OnDomOperationResponse
209. OnAppCacheAccessed
210. OnOpenColorChooser
211. OnEndColorChooser
212. OnSetSelectedColorInColorChooser
213. OnWebUISend
214. OnRequestPpapiBrokerPermission
215. OnPpapiBrokerPermissionResult
216. OnBrowserPluginMessage
217. OnDidDownloadImage
218. OnUpdateFaviconURL
219. OnMediaPlayingNotification
220. OnMediaPausedNotification
221. OnFirstVisuallyNonEmptyPaint
222. DidChangeVisibleSSLState
223. NotifyBeforeFormRepostWarningShow
224. ActivateAndShowRepostFormWarningDialog
225. SetIsLoading
226. UpdateMaxPageIDIfNecessary
227. UpdateTitleForEntry
228. NotifySwapped
229. NotifyDisconnected
230. NotifyNavigationEntryCommitted
231. OnMessageReceived
232. GetMainFrameLastCommittedURL
233. RenderFrameCreated
234. RenderFrameDeleted
235. WorkerCrashed
236. ShowContextMenu
237. GetAsWebContents
238. GetDelegateView
239. GetRendererPrefs
240. GetRootWindowResizerRect
241. RemoveBrowserPluginEmbedder
242. RenderViewCreated
243. RenderViewReady
244. RenderViewTerminated
245. RenderViewDeleted
246. UpdateState
247. UpdateTitle
248. UpdateEncoding
249. UpdateTargetURL
250. Close
251. SwappedOut
252. RequestMove
253. DidStartLoading
254. DidStopLoading
255. DidCancelLoading
256. DidChangeLoadProgress
257. DidDisownOpener
258. DidAccessInitialDocument
259. DocumentAvailableInMainFrame
260. DocumentOnLoadCompletedInMainFrame
261. RouteCloseEvent
262. RouteMessageEvent
263. RunJavaScriptMessage
264. RunBeforeUnloadConfirm
265. AddMessageToConsole
266. GetWebkitPrefs
267. CreateSwappedOutRenderView
268. OnUserGesture
269. OnIgnoredUIEvent
270. RendererUnresponsive
271. RendererResponsive
272. LoadStateChanged
273. BeforeUnloadFiredFromRenderManager
274. RenderProcessGoneFromRenderManager
275. UpdateRenderViewSizeForRenderManager
276. CancelModalDialogsForRenderManager
277. NotifySwappedFromRenderManager
278. CreateOpenerRenderViewsForRenderManager
279. CreateOpenerRenderViews
280. GetControllerForRenderManager
281. CreateWebUIForRenderManager
282. GetLastCommittedNavigationEntryForRenderManager
283. CreateRenderViewForRenderManager
284. GetJavaWebContents
285. CreateRenderViewForInitialEmptyDocument
286. OnDialogClosed
287. SetEncoding
288. CreateViewAndSetSizeForRVH
289. IsHidden
290. GetRenderManager
291. GetRenderViewHostImpl
292. GetBrowserPluginGuest
293. SetBrowserPluginGuest
294. GetBrowserPluginEmbedder
295. GetBrowserPluginGuestManager
296. ClearPowerSaveBlockers
297. ClearAllPowerSaveBlockers
298. GetSizeForNewRenderView
299. OnFrameRemoved
300. OnPreferredSizeChanged

// 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 "content/browser/web_contents/web_contents_impl.h"

#include <utility>

#include "base/command_line.h"
#include "base/debug/trace_event.h"
#include "base/lazy_instance.h"
#include "base/logging.h"
#include "base/metrics/histogram.h"
#include "base/metrics/stats_counters.h"
#include "base/process/process.h"
#include "base/strings/string16.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversions.h"
#include "base/time/time.h"
#include "content/browser/browser_plugin/browser_plugin_embedder.h"
#include "content/browser/browser_plugin/browser_plugin_guest.h"
#include "content/browser/browser_plugin/browser_plugin_guest_manager.h"
#include "content/browser/child_process_security_policy_impl.h"
#include "content/browser/devtools/render_view_devtools_agent_host.h"
#include "content/browser/dom_storage/dom_storage_context_wrapper.h"
#include "content/browser/dom_storage/session_storage_namespace_impl.h"
#include "content/browser/download/download_stats.h"
#include "content/browser/download/mhtml_generation_manager.h"
#include "content/browser/download/save_package.h"
#include "content/browser/frame_host/cross_process_frame_connector.h"
#include "content/browser/frame_host/interstitial_page_impl.h"
#include "content/browser/frame_host/navigation_entry_impl.h"
#include "content/browser/frame_host/navigator_impl.h"
#include "content/browser/frame_host/render_frame_host_impl.h"
#include "content/browser/frame_host/render_widget_host_view_child_frame.h"
#include "content/browser/host_zoom_map_impl.h"
#include "content/browser/loader/resource_dispatcher_host_impl.h"
#include "content/browser/message_port_message_filter.h"
#include "content/browser/message_port_service.h"
#include "content/browser/power_save_blocker_impl.h"
#include "content/browser/renderer_host/render_process_host_impl.h"
#include "content/browser/renderer_host/render_view_host_impl.h"
#include "content/browser/renderer_host/render_widget_host_impl.h"
#include "content/browser/site_instance_impl.h"
#include "content/browser/web_contents/web_contents_view_guest.h"
#include "content/browser/webui/generic_handler.h"
#include "content/browser/webui/web_ui_controller_factory_registry.h"
#include "content/browser/webui/web_ui_impl.h"
#include "content/common/browser_plugin/browser_plugin_constants.h"
#include "content/common/browser_plugin/browser_plugin_messages.h"
#include "content/common/frame_messages.h"
#include "content/common/image_messages.h"
#include "content/common/input_messages.h"
#include "content/common/ssl_status_serialization.h"
#include "content/common/view_messages.h"
#include "content/port/browser/render_view_host_delegate_view.h"
#include "content/port/browser/render_widget_host_view_port.h"
#include "content/public/browser/ax_event_notification_details.h"
#include "content/public/browser/browser_context.h"
#include "content/public/browser/color_chooser.h"
#include "content/public/browser/content_browser_client.h"
#include "content/public/browser/devtools_agent_host.h"
#include "content/public/browser/download_manager.h"
#include "content/public/browser/download_url_parameters.h"
#include "content/public/browser/invalidate_type.h"
#include "content/public/browser/javascript_dialog_manager.h"
#include "content/public/browser/load_from_memory_cache_details.h"
#include "content/public/browser/load_notification_details.h"
#include "content/public/browser/navigation_details.h"
#include "content/public/browser/notification_details.h"
#include "content/public/browser/notification_service.h"
#include "content/public/browser/resource_request_details.h"
#include "content/public/browser/storage_partition.h"
#include "content/public/browser/user_metrics.h"
#include "content/public/browser/web_contents_delegate.h"
#include "content/public/browser/web_contents_observer.h"
#include "content/public/browser/web_contents_view.h"
#include "content/public/common/bindings_policy.h"
#include "content/public/common/content_constants.h"
#include "content/public/common/content_switches.h"
#include "content/public/common/page_zoom.h"
#include "content/public/common/result_codes.h"
#include "content/public/common/url_constants.h"
#include "content/public/common/url_utils.h"
#include "net/base/mime_util.h"
#include "net/base/net_util.h"
#include "net/http/http_cache.h"
#include "net/http/http_transaction_factory.h"
#include "net/url_request/url_request_context.h"
#include "net/url_request/url_request_context_getter.h"
#include "ui/base/layout.h"
#include "ui/gfx/display.h"
#include "ui/gfx/screen.h"
#include "ui/gl/gl_switches.h"
#include "webkit/common/webpreferences.h"

#if defined(OS_ANDROID)
#include "content/browser/android/date_time_chooser_android.h"
#include "content/browser/renderer_host/java/java_bridge_dispatcher_host_manager.h"
#include "content/browser/web_contents/web_contents_android.h"
#include "content/common/java_bridge_messages.h"
#include "content/public/browser/android/content_view_core.h"
#endif

#if defined(OS_MACOSX)
#include "base/mac/foundation_util.h"
#include "ui/gl/io_surface_support_mac.h"
#endif

// Cross-Site Navigations
//
// If a WebContentsImpl is told to navigate to a different web site (as
// determined by SiteInstance), it will replace its current RenderViewHost with
// a new RenderViewHost dedicated to the new SiteInstance.  This works as
// follows:
//
// - RVHM::Navigate determines whether the destination is cross-site, and if so,
//   it creates a pending_render_view_host_.
// - The pending RVH is "suspended," so that no navigation messages are sent to
//   its renderer until the beforeunload JavaScript handler has a chance to
//   run in the current RVH.
// - The pending RVH tells CrossSiteRequestManager (a thread-safe singleton)
//   that it has a pending cross-site request.  We will check this on the IO
//   thread when deciding how to handle the response.
// - The current RVH runs its beforeunload handler.  If it returns false, we
//   cancel all the pending logic.  Otherwise we allow the pending RVH to send
//   the navigation request to its renderer.
// - ResourceDispatcherHost receives a ResourceRequest on the IO thread for the
//   main resource load on the pending RVH.  It creates a
//   CrossSiteResourceHandler to check whether a process swap is needed when
//   the request is ready to commit.
// - When RDH receives a response, the BufferedResourceHandler determines
//   whether it is a download.  If so, it sends a message to the new renderer
//   causing it to cancel the request, and the download proceeds. For now, the
//   pending RVH remains until the next DidNavigate event for this
//   WebContentsImpl. This isn't ideal, but it doesn't affect any functionality.
// - After RDH receives a response and determines that it is safe and not a
//   download, the CrossSiteResourceHandler checks whether a process swap is
//   needed (either because CrossSiteRequestManager has state for it or because
//   a transfer was needed for a redirect).
// - If so, CrossSiteResourceHandler pauses the response to first run the old
//   page's unload handler.  It does this by asynchronously calling the
//   OnCrossSiteResponse method of RenderFrameHostManager on the UI thread,
//   which sends a SwapOut message to the current RVH.
// - Once the unload handler is finished, RVHM::SwappedOut checks if a transfer
//   to a new process is needed, based on the stored pending_nav_params_.  (This
//   is independent of whether we started out with a cross-process navigation.)
//   - If not, it just tells the ResourceDispatcherHost to resume the response
//     to its current RenderViewHost.
//   - If so, it cancels the current pending RenderViewHost and sets up a new
//     navigation using RequestTransferURL.  When the transferred request
//     arrives in the ResourceDispatcherHost, we transfer the response and
//     resume it.
// - The pending renderer sends a FrameNavigate message that invokes the
//   DidNavigate method.  This replaces the current RVH with the
//   pending RVH.
// - The previous renderer is kept swapped out in RenderFrameHostManager in case
//   the user goes back.  The process only stays live if another tab is using
//   it, but if so, the existing frame relationships will be maintained.

namespace content {
namespace {

const char kDotGoogleDotCom[] = ".google.com";

#if defined(OS_ANDROID)
const char kWebContentsAndroidKey[] = "web_contents_android";
#endif  // OS_ANDROID

base::LazyInstance<std::vector<WebContentsImpl::CreatedCallback> >
g_created_callbacks = LAZY_INSTANCE_INITIALIZER;

static int StartDownload(content::RenderFrameHost* rfh,
                         const GURL& url,
                         bool is_favicon,
                         uint32_t max_bitmap_size) {
  static int g_next_image_download_id = 0;
  rfh->Send(new ImageMsg_DownloadImage(rfh->GetRoutingID(),
                                       ++g_next_image_download_id,
                                       url,
                                       is_favicon,
                                       max_bitmap_size));
  return g_next_image_download_id;
}

void NotifyCacheOnIO(
    scoped_refptr<net::URLRequestContextGetter> request_context,
    const GURL& url,
    const std::string& http_method) {
  request_context->GetURLRequestContext()->http_transaction_factory()->
      GetCache()->OnExternalCacheHit(url, http_method);
}

// Helper function for retrieving all the sites in a frame tree.
bool CollectSites(BrowserContext* context,
                  std::set<GURL>* sites,
                  FrameTreeNode* node) {
  sites->insert(SiteInstance::GetSiteForURL(context, node->current_url()));
  return true;
}

bool ForEachFrameInternal(
    const base::Callback<void(RenderFrameHost*)>& on_frame,
    FrameTreeNode* node) {
  on_frame.Run(node->current_frame_host());
  return true;
}

bool ForEachPendingFrameInternal(
    const base::Callback<void(RenderFrameHost*)>& on_frame,
    FrameTreeNode* node) {
  RenderFrameHost* pending_frame_host =
      node->render_manager()->pending_frame_host();
  if (pending_frame_host)
    on_frame.Run(pending_frame_host);
  return true;
}

void SendToAllFramesInternal(IPC::Message* message, RenderFrameHost* rfh) {
  IPC::Message* message_copy = new IPC::Message(*message);
  message_copy->set_routing_id(rfh->GetRoutingID());
  rfh->Send(message_copy);
}

void RunRenderFrameDeleted(
    ObserverList<WebContentsObserver>* observer_list,
    RenderFrameHost* render_frame_host) {
  FOR_EACH_OBSERVER(WebContentsObserver,
                    *observer_list,
                    RenderFrameDeleted(render_frame_host));
}

}  // namespace

WebContents* WebContents::Create(const WebContents::CreateParams& params) {
  return WebContentsImpl::CreateWithOpener(
      params, static_cast<WebContentsImpl*>(params.opener));
}

WebContents* WebContents::CreateWithSessionStorage(
    const WebContents::CreateParams& params,
    const SessionStorageNamespaceMap& session_storage_namespace_map) {
  WebContentsImpl* new_contents = new WebContentsImpl(
      params.browser_context, NULL);

  for (SessionStorageNamespaceMap::const_iterator it =
           session_storage_namespace_map.begin();
       it != session_storage_namespace_map.end();
       ++it) {
    new_contents->GetController()
        .SetSessionStorageNamespace(it->first, it->second.get());
  }

  new_contents->Init(params);
  return new_contents;
}

void WebContentsImpl::AddCreatedCallback(const CreatedCallback& callback) {
  g_created_callbacks.Get().push_back(callback);
}

void WebContentsImpl::RemoveCreatedCallback(const CreatedCallback& callback) {
  for (size_t i = 0; i < g_created_callbacks.Get().size(); ++i) {
    if (g_created_callbacks.Get().at(i).Equals(callback)) {
      g_created_callbacks.Get().erase(g_created_callbacks.Get().begin() + i);
      return;
    }
  }
}

WebContents* WebContents::FromRenderViewHost(const RenderViewHost* rvh) {
  return rvh->GetDelegate()->GetAsWebContents();
}

WebContents* WebContents::FromRenderFrameHost(RenderFrameHost* rfh) {
  RenderFrameHostImpl* rfh_impl = static_cast<RenderFrameHostImpl*>(rfh);
  if (!rfh_impl)
    return NULL;
  return rfh_impl->delegate()->GetAsWebContents();
}

// WebContentsImpl::DestructionObserver ----------------------------------------

class WebContentsImpl::DestructionObserver : public WebContentsObserver {
 public:
  DestructionObserver(WebContentsImpl* owner, WebContents* watched_contents)
      : WebContentsObserver(watched_contents),
        owner_(owner) {
  }

  // WebContentsObserver:
  virtual void WebContentsDestroyed(WebContents* web_contents) OVERRIDE {
    owner_->OnWebContentsDestroyed(static_cast<WebContentsImpl*>(web_contents));
  }

 private:
  WebContentsImpl* owner_;

  DISALLOW_COPY_AND_ASSIGN(DestructionObserver);
};

// WebContentsImpl -------------------------------------------------------------

WebContentsImpl::WebContentsImpl(
    BrowserContext* browser_context,
    WebContentsImpl* opener)
    : delegate_(NULL),
      controller_(this, browser_context),
      render_view_host_delegate_view_(NULL),
      opener_(opener),
#if defined(OS_WIN)
      accessible_parent_(NULL),
#endif
      frame_tree_(new NavigatorImpl(&controller_, this),
                  this, this, this, this),
      is_loading_(false),
      crashed_status_(base::TERMINATION_STATUS_STILL_RUNNING),
      crashed_error_code_(0),
      waiting_for_response_(false),
      load_state_(net::LOAD_STATE_IDLE, base::string16()),
      upload_size_(0),
      upload_position_(0),
      displayed_insecure_content_(false),
      capturer_count_(0),
      should_normally_be_visible_(true),
      is_being_destroyed_(false),
      notify_disconnection_(false),
      dialog_manager_(NULL),
      is_showing_before_unload_dialog_(false),
      last_active_time_(base::TimeTicks::Now()),
      closed_by_user_gesture_(false),
      minimum_zoom_percent_(static_cast<int>(kMinimumZoomFactor * 100)),
      maximum_zoom_percent_(static_cast<int>(kMaximumZoomFactor * 100)),
      temporary_zoom_settings_(false),
      totalPinchGestureAmount_(0),
      currentPinchZoomStepDelta_(0),
      color_chooser_identifier_(0),
      render_view_message_source_(NULL),
      fullscreen_widget_routing_id_(MSG_ROUTING_NONE),
      is_subframe_(false) {
  for (size_t i = 0; i < g_created_callbacks.Get().size(); i++)
    g_created_callbacks.Get().at(i).Run(this);
  frame_tree_.SetFrameRemoveListener(
      base::Bind(&WebContentsImpl::OnFrameRemoved,
                 base::Unretained(this)));
}

WebContentsImpl::~WebContentsImpl() {
  is_being_destroyed_ = true;

  // Delete all RFH pending shutdown, which will lead the corresponding RVH to
  // shutdown and be deleted as well.
  frame_tree_.ForEach(
      base::Bind(&RenderFrameHostManager::ClearRFHsPendingShutdown));

  ClearAllPowerSaveBlockers();

  for (std::set<RenderWidgetHostImpl*>::iterator iter =
           created_widgets_.begin(); iter != created_widgets_.end(); ++iter) {
    (*iter)->DetachDelegate();
  }
  created_widgets_.clear();

  // Clear out any JavaScript state.
  if (dialog_manager_)
    dialog_manager_->WebContentsDestroyed(this);

  if (color_chooser_)
    color_chooser_->End();

  NotifyDisconnected();

  // Notify any observer that have a reference on this WebContents.
  NotificationService::current()->Notify(
      NOTIFICATION_WEB_CONTENTS_DESTROYED,
      Source<WebContents>(this),
      NotificationService::NoDetails());

  base::Callback<void(RenderFrameHost*)> run_render_frame_deleted_callback =
      base::Bind(&RunRenderFrameDeleted, base::Unretained(&observers_));
  frame_tree_.ForEach(base::Bind(&ForEachPendingFrameInternal,
                                 run_render_frame_deleted_callback));

  RenderViewHost* pending_rvh = GetRenderManager()->pending_render_view_host();
  if (pending_rvh) {
    FOR_EACH_OBSERVER(WebContentsObserver,
                      observers_,
                      RenderViewDeleted(pending_rvh));
  }

  ForEachFrame(run_render_frame_deleted_callback);

  FOR_EACH_OBSERVER(WebContentsObserver,
                    observers_,
                    RenderViewDeleted(GetRenderManager()->current_host()));

  FOR_EACH_OBSERVER(WebContentsObserver,
                    observers_,
                    WebContentsImplDestroyed());

  SetDelegate(NULL);

  STLDeleteContainerPairSecondPointers(destruction_observers_.begin(),
                                       destruction_observers_.end());
}

WebContentsImpl* WebContentsImpl::CreateWithOpener(
    const WebContents::CreateParams& params,
    WebContentsImpl* opener) {
  TRACE_EVENT0("browser", "WebContentsImpl::CreateWithOpener");
  WebContentsImpl* new_contents = new WebContentsImpl(
      params.browser_context, opener);

  new_contents->Init(params);
  return new_contents;
}

// static
BrowserPluginGuest* WebContentsImpl::CreateGuest(
    BrowserContext* browser_context,
    SiteInstance* site_instance,
    int guest_instance_id,
    scoped_ptr<base::DictionaryValue> extra_params) {
  WebContentsImpl* new_contents = new WebContentsImpl(browser_context, NULL);

  // This makes |new_contents| act as a guest.
  // For more info, see comment above class BrowserPluginGuest.
  BrowserPluginGuest::Create(
      guest_instance_id, site_instance, new_contents, extra_params.Pass());

  WebContents::CreateParams create_params(browser_context, site_instance);
  new_contents->Init(create_params);

  // We are instantiating a WebContents for browser plugin. Set its subframe bit
  // to true.
  new_contents->is_subframe_ = true;

  return new_contents->browser_plugin_guest_.get();
}

RenderFrameHostManager* WebContentsImpl::GetRenderManagerForTesting() {
  return GetRenderManager();
}

bool WebContentsImpl::OnMessageReceived(RenderViewHost* render_view_host,
                                        const IPC::Message& message) {
  return OnMessageReceived(render_view_host, NULL, message);
}

bool WebContentsImpl::OnMessageReceived(RenderViewHost* render_view_host,
                                        RenderFrameHost* render_frame_host,
                                        const IPC::Message& message) {
  DCHECK(render_view_host || render_frame_host);
  if (GetWebUI() &&
      static_cast<WebUIImpl*>(GetWebUI())->OnMessageReceived(message)) {
    return true;
  }

  ObserverListBase<WebContentsObserver>::Iterator it(observers_);
  WebContentsObserver* observer;
  while ((observer = it.GetNext()) != NULL)
    if (observer->OnMessageReceived(message))
      return true;

  // Message handlers should be aware of which
  // RenderViewHost/RenderFrameHost sent the message, which is temporarily
  // stored in render_(view|frame)_message_source_.
  if (render_frame_host) {
    if (RenderViewDevToolsAgentHost::DispatchIPCMessage(
        render_frame_host->GetRenderViewHost(), message))
        return true;
    render_frame_message_source_ = render_frame_host;
  } else {
    if (RenderViewDevToolsAgentHost::DispatchIPCMessage(
        render_view_host, message))
        return true;
    render_view_message_source_ = render_view_host;
  }

  bool handled = true;
  bool message_is_ok = true;
  IPC_BEGIN_MESSAGE_MAP_EX(WebContentsImpl, message, message_is_ok)
    IPC_MESSAGE_HANDLER(FrameHostMsg_PepperPluginHung, OnPepperPluginHung)
    IPC_MESSAGE_HANDLER(FrameHostMsg_PluginCrashed, OnPluginCrashed)
    IPC_MESSAGE_HANDLER(FrameHostMsg_DomOperationResponse,
                        OnDomOperationResponse)
    IPC_MESSAGE_HANDLER(ViewHostMsg_DidLoadResourceFromMemoryCache,
                        OnDidLoadResourceFromMemoryCache)
    IPC_MESSAGE_HANDLER(ViewHostMsg_DidDisplayInsecureContent,
                        OnDidDisplayInsecureContent)
    IPC_MESSAGE_HANDLER(ViewHostMsg_DidRunInsecureContent,
                        OnDidRunInsecureContent)
    IPC_MESSAGE_HANDLER(FrameHostMsg_DidFinishDocumentLoad,
                        OnDocumentLoadedInFrame)
    IPC_MESSAGE_HANDLER(FrameHostMsg_DidFinishLoad, OnDidFinishLoad)
    IPC_MESSAGE_HANDLER(ViewHostMsg_GoToEntryAtOffset, OnGoToEntryAtOffset)
    IPC_MESSAGE_HANDLER(ViewHostMsg_UpdateZoomLimits, OnUpdateZoomLimits)
    IPC_MESSAGE_HANDLER(ViewHostMsg_EnumerateDirectory, OnEnumerateDirectory)
    IPC_MESSAGE_HANDLER(ViewHostMsg_RegisterProtocolHandler,
                        OnRegisterProtocolHandler)
    IPC_MESSAGE_HANDLER(ViewHostMsg_Find_Reply, OnFindReply)
    IPC_MESSAGE_HANDLER(ViewHostMsg_AppCacheAccessed, OnAppCacheAccessed)
    IPC_MESSAGE_HANDLER(ViewHostMsg_OpenColorChooser, OnOpenColorChooser)
    IPC_MESSAGE_HANDLER(ViewHostMsg_EndColorChooser, OnEndColorChooser)
    IPC_MESSAGE_HANDLER(ViewHostMsg_SetSelectedColorInColorChooser,
                        OnSetSelectedColorInColorChooser)
    IPC_MESSAGE_HANDLER(ViewHostMsg_WebUISend, OnWebUISend)
    IPC_MESSAGE_HANDLER(ViewHostMsg_RequestPpapiBrokerPermission,
                        OnRequestPpapiBrokerPermission)
    IPC_MESSAGE_HANDLER_GENERIC(BrowserPluginHostMsg_AllocateInstanceID,
                                OnBrowserPluginMessage(message))
    IPC_MESSAGE_HANDLER_GENERIC(BrowserPluginHostMsg_Attach,
                                OnBrowserPluginMessage(message))
    IPC_MESSAGE_HANDLER(ImageHostMsg_DidDownloadImage, OnDidDownloadImage)
    IPC_MESSAGE_HANDLER(ViewHostMsg_UpdateFaviconURL, OnUpdateFaviconURL)
#if defined(OS_ANDROID)
    IPC_MESSAGE_HANDLER(ViewHostMsg_FindMatchRects_Reply,
                        OnFindMatchRectsReply)
    IPC_MESSAGE_HANDLER(ViewHostMsg_OpenDateTimeDialog,
                        OnOpenDateTimeDialog)
    IPC_MESSAGE_HANDLER_DELAY_REPLY(JavaBridgeHostMsg_GetChannelHandle,
                                    OnJavaBridgeGetChannelHandle)
#endif
    IPC_MESSAGE_HANDLER(ViewHostMsg_MediaPlayingNotification,
                        OnMediaPlayingNotification)
    IPC_MESSAGE_HANDLER(ViewHostMsg_MediaPausedNotification,
                        OnMediaPausedNotification)
    IPC_MESSAGE_HANDLER(ViewHostMsg_DidFirstVisuallyNonEmptyPaint,
                        OnFirstVisuallyNonEmptyPaint)
    IPC_MESSAGE_HANDLER(ViewHostMsg_ShowValidationMessage,
                        OnShowValidationMessage)
    IPC_MESSAGE_HANDLER(ViewHostMsg_HideValidationMessage,
                        OnHideValidationMessage)
    IPC_MESSAGE_HANDLER(ViewHostMsg_MoveValidationMessage,
                        OnMoveValidationMessage)
    IPC_MESSAGE_UNHANDLED(handled = false)
  IPC_END_MESSAGE_MAP_EX()
  render_view_message_source_ = NULL;
  render_frame_message_source_ = NULL;

  if (!message_is_ok) {
    RecordAction(base::UserMetricsAction("BadMessageTerminate_RVD"));
    GetRenderProcessHost()->ReceivedBadMessage();
  }

  return handled;
}

void WebContentsImpl::RunFileChooser(
    RenderViewHost* render_view_host,
    const FileChooserParams& params) {
  if (delegate_)
    delegate_->RunFileChooser(this, params);
}

NavigationControllerImpl& WebContentsImpl::GetController() {
  return controller_;
}

const NavigationControllerImpl& WebContentsImpl::GetController() const {
  return controller_;
}

BrowserContext* WebContentsImpl::GetBrowserContext() const {
  return controller_.GetBrowserContext();
}

const GURL& WebContentsImpl::GetURL() const {
  // We may not have a navigation entry yet.
  NavigationEntry* entry = controller_.GetVisibleEntry();
  return entry ? entry->GetVirtualURL() : GURL::EmptyGURL();
}

const GURL& WebContentsImpl::GetVisibleURL() const {
  // We may not have a navigation entry yet.
  NavigationEntry* entry = controller_.GetVisibleEntry();
  return entry ? entry->GetVirtualURL() : GURL::EmptyGURL();
}

const GURL& WebContentsImpl::GetLastCommittedURL() const {
  // We may not have a navigation entry yet.
  NavigationEntry* entry = controller_.GetLastCommittedEntry();
  return entry ? entry->GetVirtualURL() : GURL::EmptyGURL();
}

WebContentsDelegate* WebContentsImpl::GetDelegate() {
  return delegate_;
}

void WebContentsImpl::SetDelegate(WebContentsDelegate* delegate) {
  // TODO(cbentzel): remove this debugging code?
  if (delegate == delegate_)
    return;
  if (delegate_)
    delegate_->Detach(this);
  delegate_ = delegate;
  if (delegate_) {
    delegate_->Attach(this);
    // Ensure the visible RVH reflects the new delegate's preferences.
    if (view_)
      view_->SetOverscrollControllerEnabled(delegate->CanOverscrollContent());
  }
}

RenderProcessHost* WebContentsImpl::GetRenderProcessHost() const {
  RenderViewHostImpl* host = GetRenderManager()->current_host();
  return host ? host->GetProcess() : NULL;
}

RenderFrameHost* WebContentsImpl::GetMainFrame() {
  return frame_tree_.root()->current_frame_host();
}

RenderFrameHost* WebContentsImpl::GetFocusedFrame() {
  if (!frame_tree_.GetFocusedFrame())
    return NULL;
  return frame_tree_.GetFocusedFrame()->current_frame_host();
}

void WebContentsImpl::ForEachFrame(
    const base::Callback<void(RenderFrameHost*)>& on_frame) {
  frame_tree_.ForEach(base::Bind(&ForEachFrameInternal, on_frame));
}

void WebContentsImpl::SendToAllFrames(IPC::Message* message) {
  ForEachFrame(base::Bind(&SendToAllFramesInternal, message));
  delete message;
}

RenderViewHost* WebContentsImpl::GetRenderViewHost() const {
  return GetRenderManager()->current_host();
}

WebContents* WebContentsImpl::GetEmbedderWebContents() const {
  BrowserPluginGuest* guest = GetBrowserPluginGuest();
  if (guest)
    return guest->embedder_web_contents();
  return NULL;
}

int WebContentsImpl::GetEmbeddedInstanceID() const {
  BrowserPluginGuest* guest = GetBrowserPluginGuest();
  if (guest)
    return guest->instance_id();
  return 0;
}

int WebContentsImpl::GetRoutingID() const {
  if (!GetRenderViewHost())
    return MSG_ROUTING_NONE;

  return GetRenderViewHost()->GetRoutingID();
}

int WebContentsImpl::GetFullscreenWidgetRoutingID() const {
  return fullscreen_widget_routing_id_;
}

RenderWidgetHostView* WebContentsImpl::GetRenderWidgetHostView() const {
  return GetRenderManager()->GetRenderWidgetHostView();
}

RenderWidgetHostViewPort* WebContentsImpl::GetRenderWidgetHostViewPort() const {
  BrowserPluginGuest* guest = GetBrowserPluginGuest();
  if (guest && guest->embedder_web_contents()) {
    return guest->embedder_web_contents()->GetRenderWidgetHostViewPort();
  }
  return RenderWidgetHostViewPort::FromRWHV(GetRenderWidgetHostView());
}

RenderWidgetHostView* WebContentsImpl::GetFullscreenRenderWidgetHostView()
    const {
  RenderWidgetHost* const widget_host =
      RenderWidgetHostImpl::FromID(GetRenderProcessHost()->GetID(),
                                   GetFullscreenWidgetRoutingID());
  return widget_host ? widget_host->GetView() : NULL;
}

WebContentsView* WebContentsImpl::GetView() const {
  return view_.get();
}

WebUI* WebContentsImpl::CreateWebUI(const GURL& url) {
  WebUIImpl* web_ui = new WebUIImpl(this);
  WebUIController* controller = WebUIControllerFactoryRegistry::GetInstance()->
      CreateWebUIControllerForURL(web_ui, url);
  if (controller) {
    web_ui->AddMessageHandler(new GenericHandler());
    web_ui->SetController(controller);
    return web_ui;
  }

  delete web_ui;
  return NULL;
}

WebUI* WebContentsImpl::GetWebUI() const {
  return GetRenderManager()->web_ui() ? GetRenderManager()->web_ui()
      : GetRenderManager()->pending_web_ui();
}

WebUI* WebContentsImpl::GetCommittedWebUI() const {
  return GetRenderManager()->web_ui();
}

void WebContentsImpl::SetUserAgentOverride(const std::string& override) {
  if (GetUserAgentOverride() == override)
    return;

  renderer_preferences_.user_agent_override = override;

  // Send the new override string to the renderer.
  RenderViewHost* host = GetRenderViewHost();
  if (host)
    host->SyncRendererPrefs();

  // Reload the page if a load is currently in progress to avoid having
  // different parts of the page loaded using different user agents.
  NavigationEntry* entry = controller_.GetVisibleEntry();
  if (is_loading_ && entry != NULL && entry->GetIsOverridingUserAgent())
    controller_.ReloadIgnoringCache(true);

  FOR_EACH_OBSERVER(WebContentsObserver, observers_,
                    UserAgentOverrideSet(override));
}

const std::string& WebContentsImpl::GetUserAgentOverride() const {
  return renderer_preferences_.user_agent_override;
}

#if defined(OS_WIN)
void WebContentsImpl::SetParentNativeViewAccessible(
gfx::NativeViewAccessible accessible_parent) {
  accessible_parent_ = accessible_parent;
  if (GetRenderViewHost())
    GetRenderViewHostImpl()->SetParentNativeViewAccessible(accessible_parent);
}
#endif

const base::string16& WebContentsImpl::GetTitle() const {
  // Transient entries take precedence. They are used for interstitial pages
  // that are shown on top of existing pages.
  NavigationEntry* entry = controller_.GetTransientEntry();
  std::string accept_languages =
      GetContentClient()->browser()->GetAcceptLangs(
          GetBrowserContext());
  if (entry) {
    return entry->GetTitleForDisplay(accept_languages);
  }
  WebUI* our_web_ui = GetRenderManager()->pending_web_ui() ?
      GetRenderManager()->pending_web_ui() : GetRenderManager()->web_ui();
  if (our_web_ui) {
    // Don't override the title in view source mode.
    entry = controller_.GetVisibleEntry();
    if (!(entry && entry->IsViewSourceMode())) {
      // Give the Web UI the chance to override our title.
      const base::string16& title = our_web_ui->GetOverriddenTitle();
      if (!title.empty())
        return title;
    }
  }

  // We use the title for the last committed entry rather than a pending
  // navigation entry. For example, when the user types in a URL, we want to
  // keep the old page's title until the new load has committed and we get a new
  // title.
  entry = controller_.GetLastCommittedEntry();

  // We make an exception for initial navigations.
  if (controller_.IsInitialNavigation()) {
    // We only want to use the title from the visible entry in one of two cases:
    // 1. There's already a committed entry for an initial navigation, in which
    //    case we are doing a history navigation in a new tab (e.g., Ctrl+Back).
    // 2. The pending entry has been explicitly assigned a title to display.
    //
    // If there's no last committed entry and no assigned title, we should fall
    // back to |page_title_when_no_navigation_entry_| rather than showing the
    // URL.
    if (entry ||
        (controller_.GetVisibleEntry() &&
         !controller_.GetVisibleEntry()->GetTitle().empty())) {
      entry = controller_.GetVisibleEntry();
    }
  }

  if (entry) {
    return entry->GetTitleForDisplay(accept_languages);
  }

  // |page_title_when_no_navigation_entry_| is finally used
  // if no title cannot be retrieved.
  return page_title_when_no_navigation_entry_;
}

int32 WebContentsImpl::GetMaxPageID() {
  return GetMaxPageIDForSiteInstance(GetSiteInstance());
}

int32 WebContentsImpl::GetMaxPageIDForSiteInstance(
    SiteInstance* site_instance) {
  if (max_page_ids_.find(site_instance->GetId()) == max_page_ids_.end())
    max_page_ids_[site_instance->GetId()] = -1;

  return max_page_ids_[site_instance->GetId()];
}

void WebContentsImpl::UpdateMaxPageID(int32 page_id) {
  UpdateMaxPageIDForSiteInstance(GetSiteInstance(), page_id);
}

void WebContentsImpl::UpdateMaxPageIDForSiteInstance(
    SiteInstance* site_instance, int32 page_id) {
  if (GetMaxPageIDForSiteInstance(site_instance) < page_id)
    max_page_ids_[site_instance->GetId()] = page_id;
}

void WebContentsImpl::CopyMaxPageIDsFrom(WebContents* web_contents) {
  WebContentsImpl* contents = static_cast<WebContentsImpl*>(web_contents);
  max_page_ids_ = contents->max_page_ids_;
}

SiteInstance* WebContentsImpl::GetSiteInstance() const {
  return GetRenderManager()->current_host()->GetSiteInstance();
}

SiteInstance* WebContentsImpl::GetPendingSiteInstance() const {
  RenderViewHost* dest_rvh = GetRenderManager()->pending_render_view_host() ?
      GetRenderManager()->pending_render_view_host() :
      GetRenderManager()->current_host();
  return dest_rvh->GetSiteInstance();
}

bool WebContentsImpl::IsLoading() const {
  return is_loading_;
}

bool WebContentsImpl::IsWaitingForResponse() const {
  return waiting_for_response_;
}

const net::LoadStateWithParam& WebContentsImpl::GetLoadState() const {
  return load_state_;
}

const base::string16& WebContentsImpl::GetLoadStateHost() const {
  return load_state_host_;
}

uint64 WebContentsImpl::GetUploadSize() const {
  return upload_size_;
}

uint64 WebContentsImpl::GetUploadPosition() const {
  return upload_position_;
}

std::set<GURL> WebContentsImpl::GetSitesInTab() const {
  std::set<GURL> sites;
  frame_tree_.ForEach(base::Bind(&CollectSites,
                                 base::Unretained(GetBrowserContext()),
                                 base::Unretained(&sites)));
  return sites;
}

const std::string& WebContentsImpl::GetEncoding() const {
  return encoding_;
}

bool WebContentsImpl::DisplayedInsecureContent() const {
  return displayed_insecure_content_;
}

void WebContentsImpl::IncrementCapturerCount(const gfx::Size& capture_size) {
  DCHECK(!is_being_destroyed_);
  ++capturer_count_;
  DVLOG(1) << "There are now " << capturer_count_
           << " capturing(s) of WebContentsImpl@" << this;

  // Note: This provides a hint to upstream code to size the views optimally
  // for quality (e.g., to avoid scaling).
  if (!capture_size.IsEmpty() && preferred_size_for_capture_.IsEmpty()) {
    preferred_size_for_capture_ = capture_size;
    OnPreferredSizeChanged(preferred_size_);
  }
}

void WebContentsImpl::DecrementCapturerCount() {
  --capturer_count_;
  DVLOG(1) << "There are now " << capturer_count_
           << " capturing(s) of WebContentsImpl@" << this;
  DCHECK_LE(0, capturer_count_);

  if (is_being_destroyed_)
    return;

  if (capturer_count_ == 0) {
    const gfx::Size old_size = preferred_size_for_capture_;
    preferred_size_for_capture_ = gfx::Size();
    OnPreferredSizeChanged(old_size);
  }

  if (IsHidden()) {
    DVLOG(1) << "Executing delayed WasHidden().";
    WasHidden();
  }
}

int WebContentsImpl::GetCapturerCount() const {
  return capturer_count_;
}

bool WebContentsImpl::IsCrashed() const {
  return (crashed_status_ == base::TERMINATION_STATUS_PROCESS_CRASHED ||
          crashed_status_ == base::TERMINATION_STATUS_ABNORMAL_TERMINATION ||
          crashed_status_ == base::TERMINATION_STATUS_PROCESS_WAS_KILLED);
}

void WebContentsImpl::SetIsCrashed(base::TerminationStatus status,
                                   int error_code) {
  if (status == crashed_status_)
    return;

  crashed_status_ = status;
  crashed_error_code_ = error_code;
  NotifyNavigationStateChanged(INVALIDATE_TYPE_TAB);
}

base::TerminationStatus WebContentsImpl::GetCrashedStatus() const {
  return crashed_status_;
}

bool WebContentsImpl::IsBeingDestroyed() const {
  return is_being_destroyed_;
}

void WebContentsImpl::NotifyNavigationStateChanged(unsigned changed_flags) {
  if (delegate_)
    delegate_->NavigationStateChanged(this, changed_flags);
}

base::TimeTicks WebContentsImpl::GetLastActiveTime() const {
  return last_active_time_;
}

void WebContentsImpl::WasShown() {
  controller_.SetActive(true);
  RenderWidgetHostViewPort* rwhv =
      RenderWidgetHostViewPort::FromRWHV(GetRenderWidgetHostView());
  if (rwhv) {
    rwhv->Show();
#if defined(OS_MACOSX)
    rwhv->SetActive(true);
#endif
  }

  last_active_time_ = base::TimeTicks::Now();

  // The resize rect might have changed while this was inactive -- send the new
  // one to make sure it's up to date.
  RenderViewHostImpl* rvh =
      static_cast<RenderViewHostImpl*>(GetRenderViewHost());
  if (rvh) {
    rvh->ResizeRectChanged(GetRootWindowResizerRect());
  }

  FOR_EACH_OBSERVER(WebContentsObserver, observers_, WasShown());

  should_normally_be_visible_ = true;
}

void WebContentsImpl::WasHidden() {
  // If there are entities capturing screenshots or video (e.g., mirroring),
  // don't activate the "disable rendering" optimization.
  if (capturer_count_ == 0) {
    // |GetRenderViewHost()| can be NULL if the user middle clicks a link to
    // open a tab in the background, then closes the tab before selecting it.
    // This is because closing the tab calls WebContentsImpl::Destroy(), which
    // removes the |GetRenderViewHost()|; then when we actually destroy the
    // window, OnWindowPosChanged() notices and calls WasHidden() (which
    // calls us).
    RenderWidgetHostViewPort* rwhv =
        RenderWidgetHostViewPort::FromRWHV(GetRenderWidgetHostView());
    if (rwhv)
      rwhv->Hide();
  }

  FOR_EACH_OBSERVER(WebContentsObserver, observers_, WasHidden());

  should_normally_be_visible_ = false;
}

bool WebContentsImpl::NeedToFireBeforeUnload() {
  // TODO(creis): Should we fire even for interstitial pages?
  return WillNotifyDisconnection() &&
      !ShowingInterstitialPage() &&
      !static_cast<RenderViewHostImpl*>(
          GetRenderViewHost())->SuddenTerminationAllowed();
}

void WebContentsImpl::Stop() {
  GetRenderManager()->Stop();
  FOR_EACH_OBSERVER(WebContentsObserver, observers_, NavigationStopped());
}

WebContents* WebContentsImpl::Clone() {
  // We use our current SiteInstance since the cloned entry will use it anyway.
  // We pass our own opener so that the cloned page can access it if it was
  // before.
  CreateParams create_params(GetBrowserContext(), GetSiteInstance());
  create_params.initial_size = view_->GetContainerSize();
  WebContentsImpl* tc = CreateWithOpener(create_params, opener_);
  tc->GetController().CopyStateFrom(controller_);
  FOR_EACH_OBSERVER(WebContentsObserver,
                    observers_,
                    DidCloneToNewWebContents(this, tc));
  return tc;
}

void WebContentsImpl::Observe(int type,
                              const NotificationSource& source,
                              const NotificationDetails& details) {
  switch (type) {
    case NOTIFICATION_RENDER_WIDGET_HOST_DESTROYED: {
      RenderWidgetHost* host = Source<RenderWidgetHost>(source).ptr();
      for (PendingWidgetViews::iterator i = pending_widget_views_.begin();
           i != pending_widget_views_.end(); ++i) {
        if (host->GetView() == i->second) {
          pending_widget_views_.erase(i);
          break;
        }
      }
      break;
    }
    default:
      NOTREACHED();
  }
}

WebContents* WebContentsImpl::GetWebContents() {
  return this;
}

void WebContentsImpl::Init(const WebContents::CreateParams& params) {
  // This is set before initializing the render manager since
  // RenderFrameHostManager::Init calls back into us via its delegate to ask if
  // it should be hidden.
  should_normally_be_visible_ = !params.initially_hidden;

  GetRenderManager()->Init(
      params.browser_context, params.site_instance, params.routing_id,
      params.main_frame_routing_id);

  view_.reset(GetContentClient()->browser()->
      OverrideCreateWebContentsView(this, &render_view_host_delegate_view_));
  if (view_) {
    CHECK(render_view_host_delegate_view_);
  } else {
    WebContentsViewDelegate* delegate =
        GetContentClient()->browser()->GetWebContentsViewDelegate(this);

    if (browser_plugin_guest_) {
      scoped_ptr<WebContentsViewPort> platform_view(CreateWebContentsView(
          this, delegate, &render_view_host_delegate_view_));

      WebContentsViewGuest* rv = new WebContentsViewGuest(
          this, browser_plugin_guest_.get(), platform_view.Pass(),
          render_view_host_delegate_view_);
      render_view_host_delegate_view_ = rv;
      view_.reset(rv);
    } else {
      // Regular WebContentsView.
      view_.reset(CreateWebContentsView(
          this, delegate, &render_view_host_delegate_view_));
    }
    CHECK(render_view_host_delegate_view_);
  }
  CHECK(view_.get());

  gfx::Size initial_size = params.initial_size;
  view_->CreateView(initial_size, params.context);

  // Listen for whether our opener gets destroyed.
  if (opener_)
    AddDestructionObserver(opener_);

  registrar_.Add(this,
                 NOTIFICATION_RENDER_WIDGET_HOST_DESTROYED,
                 NotificationService::AllBrowserContextsAndSources());
#if defined(OS_ANDROID)
  java_bridge_dispatcher_host_manager_.reset(
      new JavaBridgeDispatcherHostManager(this));
  date_time_chooser_.reset(new DateTimeChooserAndroid());
#endif
}

void WebContentsImpl::OnWebContentsDestroyed(WebContentsImpl* web_contents) {
  RemoveDestructionObserver(web_contents);

  // Clear the opener if it has been closed.
  if (web_contents == opener_) {
    opener_ = NULL;
    return;
  }
  // Clear a pending contents that has been closed before being shown.
  for (PendingContents::iterator iter = pending_contents_.begin();
       iter != pending_contents_.end();
       ++iter) {
    if (iter->second != web_contents)
      continue;
    pending_contents_.erase(iter);
    return;
  }
  NOTREACHED();
}

void WebContentsImpl::AddDestructionObserver(WebContentsImpl* web_contents) {
  if (!ContainsKey(destruction_observers_, web_contents)) {
    destruction_observers_[web_contents] =
        new DestructionObserver(this, web_contents);
  }
}

void WebContentsImpl::RemoveDestructionObserver(WebContentsImpl* web_contents) {
  DestructionObservers::iterator iter =
      destruction_observers_.find(web_contents);
  if (iter != destruction_observers_.end()) {
    delete destruction_observers_[web_contents];
    destruction_observers_.erase(iter);
  }
}

void WebContentsImpl::AddObserver(WebContentsObserver* observer) {
  observers_.AddObserver(observer);
}

void WebContentsImpl::RemoveObserver(WebContentsObserver* observer) {
  observers_.RemoveObserver(observer);
}

void WebContentsImpl::Activate() {
  if (delegate_)
    delegate_->ActivateContents(this);
}

void WebContentsImpl::Deactivate() {
  if (delegate_)
    delegate_->DeactivateContents(this);
}

void WebContentsImpl::LostCapture() {
  if (delegate_)
    delegate_->LostCapture();
}

void WebContentsImpl::RenderWidgetDeleted(
    RenderWidgetHostImpl* render_widget_host) {
  if (is_being_destroyed_) {
    // |created_widgets_| might have been destroyed.
    return;
  }

  std::set<RenderWidgetHostImpl*>::iterator iter =
      created_widgets_.find(render_widget_host);
  if (iter != created_widgets_.end())
    created_widgets_.erase(iter);

  if (render_widget_host &&
      render_widget_host->GetRoutingID() == fullscreen_widget_routing_id_) {
    if (delegate_ && delegate_->EmbedsFullscreenWidget())
      delegate_->ToggleFullscreenModeForTab(this, false);
    FOR_EACH_OBSERVER(WebContentsObserver,
                      observers_,
                      DidDestroyFullscreenWidget(
                          fullscreen_widget_routing_id_));
    fullscreen_widget_routing_id_ = MSG_ROUTING_NONE;
  }
}

bool WebContentsImpl::PreHandleKeyboardEvent(
    const NativeWebKeyboardEvent& event,
    bool* is_keyboard_shortcut) {
  return delegate_ &&
      delegate_->PreHandleKeyboardEvent(this, event, is_keyboard_shortcut);
}

void WebContentsImpl::HandleKeyboardEvent(const NativeWebKeyboardEvent& event) {
  if (browser_plugin_embedder_ &&
      browser_plugin_embedder_->HandleKeyboardEvent(event)) {
    return;
  }

  if (delegate_)
    delegate_->HandleKeyboardEvent(this, event);
}

bool WebContentsImpl::HandleWheelEvent(
    const blink::WebMouseWheelEvent& event) {
#if !defined(OS_MACOSX)
  // On platforms other than Mac, control+mousewheel changes zoom. On Mac, this
  // isn't done for two reasons:
  //   -the OS already has a gesture to do this through pinch-zoom
  //   -if a user starts an inertial scroll, let's go, and presses control
  //      (i.e. control+tab) then the OS's buffered scroll events will come in
  //      with control key set which isn't what the user wants
  if (delegate_ &&
      event.wheelTicksY &&
      (event.modifiers & blink::WebInputEvent::ControlKey)) {
    delegate_->ContentsZoomChange(event.wheelTicksY > 0);
    return true;
  }
#endif
  return false;
}

bool WebContentsImpl::PreHandleGestureEvent(
    const blink::WebGestureEvent& event) {
  return delegate_ && delegate_->PreHandleGestureEvent(this, event);
}

bool WebContentsImpl::HandleGestureEvent(
    const blink::WebGestureEvent& event) {
  // Some platforms (eg. Mac) send GesturePinch events for trackpad pinch-zoom.
  // Use them to implement browser zoom, as for HandleWheelEvent above.
  if (event.type == blink::WebInputEvent::GesturePinchUpdate &&
      event.sourceDevice == blink::WebGestureEvent::Touchpad) {
    // The scale difference necessary to trigger a zoom action. Derived from
    // experimentation to find a value that feels reasonable.
    const float kZoomStepValue = 0.6f;

    // Find the (absolute) thresholds on either side of the current zoom factor,
    // then convert those to actual numbers to trigger a zoom in or out.
    // This logic deliberately makes the range around the starting zoom value
    // for the gesture twice as large as the other ranges (i.e., the notches are
    // at ..., -3*step, -2*step, -step, step, 2*step, 3*step, ... but not at 0)
    // so that it's easier to get back to your starting point than it is to
    // overshoot.
    float nextStep = (abs(currentPinchZoomStepDelta_) + 1) * kZoomStepValue;
    float backStep = abs(currentPinchZoomStepDelta_) * kZoomStepValue;
    float zoomInThreshold = (currentPinchZoomStepDelta_ >= 0) ? nextStep
        : -backStep;
    float zoomOutThreshold = (currentPinchZoomStepDelta_ <= 0) ? -nextStep
        : backStep;

    totalPinchGestureAmount_ += event.data.pinchUpdate.scale;
    if (totalPinchGestureAmount_ > zoomInThreshold) {
      currentPinchZoomStepDelta_++;
      delegate_->ContentsZoomChange(true);
    } else if (totalPinchGestureAmount_ < zoomOutThreshold) {
      currentPinchZoomStepDelta_--;
      delegate_->ContentsZoomChange(false);
    }
    return true;
  }

  return false;
}

#if defined(OS_WIN)
gfx::NativeViewAccessible WebContentsImpl::GetParentNativeViewAccessible() {
  return accessible_parent_;
}
#endif

void WebContentsImpl::HandleMouseDown() {
  if (delegate_)
    delegate_->HandleMouseDown();
}

void WebContentsImpl::HandleMouseUp() {
  if (delegate_)
    delegate_->HandleMouseUp();
}

void WebContentsImpl::HandlePointerActivate() {
  if (delegate_)
    delegate_->HandlePointerActivate();
}

void WebContentsImpl::HandleGestureBegin() {
  if (delegate_)
    delegate_->HandleGestureBegin();
}

void WebContentsImpl::HandleGestureEnd() {
  if (delegate_)
    delegate_->HandleGestureEnd();
}

void WebContentsImpl::ToggleFullscreenMode(bool enter_fullscreen) {
  // This method is being called to enter or leave renderer-initiated fullscreen
  // mode.  Either way, make sure any existing fullscreen widget is shut down
  // first.
  RenderWidgetHostView* const widget_view = GetFullscreenRenderWidgetHostView();
  if (widget_view)
    RenderWidgetHostImpl::From(widget_view->GetRenderWidgetHost())->Shutdown();

  if (delegate_)
    delegate_->ToggleFullscreenModeForTab(this, enter_fullscreen);

  FOR_EACH_OBSERVER(WebContentsObserver,
                    observers_,
                    DidToggleFullscreenModeForTab(IsFullscreenForCurrentTab()));
}

bool WebContentsImpl::IsFullscreenForCurrentTab() const {
  return delegate_ ? delegate_->IsFullscreenForTabOrPending(this) : false;
}

void WebContentsImpl::RequestToLockMouse(bool user_gesture,
                                         bool last_unlocked_by_target) {
  if (delegate_) {
    delegate_->RequestToLockMouse(this, user_gesture, last_unlocked_by_target);
  } else {
    GotResponseToLockMouseRequest(false);
  }
}

void WebContentsImpl::LostMouseLock() {
  if (delegate_)
    delegate_->LostMouseLock();
}

void WebContentsImpl::CreateNewWindow(
    int render_process_id,
    int route_id,
    int main_frame_route_id,
    const ViewHostMsg_CreateWindow_Params& params,
    SessionStorageNamespace* session_storage_namespace) {
  // We usually create the new window in the same BrowsingInstance (group of
  // script-related windows), by passing in the current SiteInstance.  However,
  // if the opener is being suppressed (in a non-guest), we create a new
  // SiteInstance in its own BrowsingInstance.
  bool is_guest = GetRenderProcessHost()->IsGuest();

  // If the opener is to be suppressed, the new window can be in any process.
  // Since routing ids are process specific, we must not have one passed in
  // as argument here.
  DCHECK(!params.opener_suppressed || route_id == MSG_ROUTING_NONE);

  scoped_refptr<SiteInstance> site_instance =
      params.opener_suppressed && !is_guest ?
      SiteInstance::CreateForURL(GetBrowserContext(), params.target_url) :
      GetSiteInstance();

  // A message to create a new window can only come from the active process for
  // this WebContentsImpl instance. If any other process sends the request,
  // it is invalid and the process must be terminated.
  if (GetRenderProcessHost()->GetID() != render_process_id) {
    base::ProcessHandle process_handle =
        RenderProcessHost::FromID(render_process_id)->GetHandle();
    if (process_handle != base::kNullProcessHandle) {
      RecordAction(
          base::UserMetricsAction("Terminate_ProcessMismatch_CreateNewWindow"));
      base::KillProcess(process_handle, content::RESULT_CODE_KILLED, false);
    }
    return;
  }

  // We must assign the SessionStorageNamespace before calling Init().
  //
  // http://crbug.com/142685
  const std::string& partition_id =
      GetContentClient()->browser()->
          GetStoragePartitionIdForSite(GetBrowserContext(),
                                       site_instance->GetSiteURL());
  StoragePartition* partition = BrowserContext::GetStoragePartition(
      GetBrowserContext(), site_instance.get());
  DOMStorageContextWrapper* dom_storage_context =
      static_cast<DOMStorageContextWrapper*>(partition->GetDOMStorageContext());
  SessionStorageNamespaceImpl* session_storage_namespace_impl =
      static_cast<SessionStorageNamespaceImpl*>(session_storage_namespace);
  CHECK(session_storage_namespace_impl->IsFromContext(dom_storage_context));

  if (delegate_ &&
      !delegate_->ShouldCreateWebContents(this,
                                          route_id,
                                          params.window_container_type,
                                          params.frame_name,
                                          params.target_url,
                                          partition_id,
                                          session_storage_namespace)) {
    if (route_id != MSG_ROUTING_NONE &&
        !RenderViewHost::FromID(render_process_id, route_id)) {
      // If the embedder didn't create a WebContents for this route, we need to
      // delete the RenderView that had already been created.
      Send(new ViewMsg_Close(route_id));
    }
    GetRenderViewHost()->GetProcess()->ResumeRequestsForView(route_id);
    GetRenderViewHost()->GetProcess()->ResumeRequestsForView(
        main_frame_route_id);
    return;
  }

  // Create the new web contents. This will automatically create the new
  // WebContentsView. In the future, we may want to create the view separately.
  WebContentsImpl* new_contents =
      new WebContentsImpl(GetBrowserContext(),
                          params.opener_suppressed ? NULL : this);

  new_contents->GetController().SetSessionStorageNamespace(
      partition_id,
      session_storage_namespace);
  CreateParams create_params(GetBrowserContext(), site_instance.get());
  create_params.routing_id = route_id;
  create_params.main_frame_routing_id = main_frame_route_id;
  if (!is_guest) {
    create_params.context = view_->GetNativeView();
    create_params.initial_size = view_->GetContainerSize();
  } else {
    // This makes |new_contents| act as a guest.
    // For more info, see comment above class BrowserPluginGuest.
    int instance_id = GetBrowserPluginGuestManager()->get_next_instance_id();
    WebContentsImpl* new_contents_impl =
        static_cast<WebContentsImpl*>(new_contents);
    BrowserPluginGuest::CreateWithOpener(instance_id,
                                         new_contents_impl->opener() != NULL,
                                         new_contents_impl,
                                         GetBrowserPluginGuest());
  }
  if (params.disposition == NEW_BACKGROUND_TAB)
    create_params.initially_hidden = true;
  new_contents->Init(create_params);

  // Save the window for later if we're not suppressing the opener (since it
  // will be shown immediately).
  if (!params.opener_suppressed) {
    if (!is_guest) {
      WebContentsViewPort* new_view = new_contents->view_.get();

      // TODO(brettw): It seems bogus that we have to call this function on the
      // newly created object and give it one of its own member variables.
      new_view->CreateViewForWidget(new_contents->GetRenderViewHost());
    }
    // Save the created window associated with the route so we can show it
    // later.
    DCHECK_NE(MSG_ROUTING_NONE, route_id);
    pending_contents_[route_id] = new_contents;
    AddDestructionObserver(new_contents);
  }

  if (delegate_) {
    delegate_->WebContentsCreated(
        this, params.opener_render_frame_id, params.frame_name,
        params.target_url, new_contents);
  }

  if (params.opener_suppressed) {
    // When the opener is suppressed, the original renderer cannot access the
    // new window.  As a result, we need to show and navigate the window here.
    bool was_blocked = false;
    if (delegate_) {
      gfx::Rect initial_pos;
      delegate_->AddNewContents(
          this, new_contents, params.disposition, initial_pos,
          params.user_gesture, &was_blocked);
    }
    if (!was_blocked) {
      OpenURLParams open_params(params.target_url,
                                Referrer(),
                                CURRENT_TAB,
                                PAGE_TRANSITION_LINK,
                                true /* is_renderer_initiated */);
      open_params.user_gesture = params.user_gesture;
      new_contents->OpenURL(open_params);
    }
  }
}

void WebContentsImpl::CreateNewWidget(int render_process_id,
                                      int route_id,
                                      blink::WebPopupType popup_type) {
  CreateNewWidget(render_process_id, route_id, false, popup_type);
}

void WebContentsImpl::CreateNewFullscreenWidget(int render_process_id,
                                                int route_id) {
  CreateNewWidget(render_process_id, route_id, true, blink::WebPopupTypeNone);
}

void WebContentsImpl::CreateNewWidget(int render_process_id,
                                      int route_id,
                                      bool is_fullscreen,
                                      blink::WebPopupType popup_type) {
  RenderProcessHost* process = GetRenderProcessHost();
  // A message to create a new widget can only come from the active process for
  // this WebContentsImpl instance. If any other process sends the request,
  // it is invalid and the process must be terminated.
  if (process->GetID() != render_process_id) {
    base::ProcessHandle process_handle =
        RenderProcessHost::FromID(render_process_id)->GetHandle();
    if (process_handle != base::kNullProcessHandle) {
      RecordAction(
          base::UserMetricsAction("Terminate_ProcessMismatch_CreateNewWidget"));
      base::KillProcess(process_handle, content::RESULT_CODE_KILLED, false);
    }
    return;
  }

  RenderWidgetHostImpl* widget_host =
      new RenderWidgetHostImpl(this, process, route_id, IsHidden());
  created_widgets_.insert(widget_host);

  RenderWidgetHostViewPort* widget_view = RenderWidgetHostViewPort::FromRWHV(
      view_->CreateViewForPopupWidget(widget_host));
  if (!widget_view)
    return;
  if (!is_fullscreen) {
    // Popups should not get activated.
    widget_view->SetPopupType(popup_type);
  }
  // Save the created widget associated with the route so we can show it later.
  pending_widget_views_[route_id] = widget_view;

#if defined(OS_MACOSX)
  // A RenderWidgetHostViewMac has lifetime scoped to the view. We'll retain it
  // to allow it to survive the trip without being hosted.
  base::mac::NSObjectRetain(widget_view->GetNativeView());
#endif
}

void WebContentsImpl::ShowCreatedWindow(int route_id,
                                        WindowOpenDisposition disposition,
                                        const gfx::Rect& initial_pos,
                                        bool user_gesture) {
  WebContentsImpl* contents = GetCreatedWindow(route_id);
  if (contents) {
    WebContentsDelegate* delegate = GetDelegate();
    if (delegate) {
      delegate->AddNewContents(
          this, contents, disposition, initial_pos, user_gesture, NULL);
    }
  }
}

void WebContentsImpl::ShowCreatedWidget(int route_id,
                                        const gfx::Rect& initial_pos) {
  ShowCreatedWidget(route_id, false, initial_pos);
}

void WebContentsImpl::ShowCreatedFullscreenWidget(int route_id) {
  ShowCreatedWidget(route_id, true, gfx::Rect());
}

void WebContentsImpl::ShowCreatedWidget(int route_id,
                                        bool is_fullscreen,
                                        const gfx::Rect& initial_pos) {
  RenderWidgetHostViewPort* widget_host_view =
      RenderWidgetHostViewPort::FromRWHV(GetCreatedWidget(route_id));
  if (!widget_host_view)
    return;
  if (is_fullscreen) {
    DCHECK_EQ(MSG_ROUTING_NONE, fullscreen_widget_routing_id_);
    fullscreen_widget_routing_id_ = route_id;
    if (delegate_ && delegate_->EmbedsFullscreenWidget()) {
      widget_host_view->InitAsChild(GetRenderWidgetHostView()->GetNativeView());
      delegate_->ToggleFullscreenModeForTab(this, true);
    } else {
      widget_host_view->InitAsFullscreen(GetRenderWidgetHostViewPort());
    }
    FOR_EACH_OBSERVER(WebContentsObserver,
                      observers_,
                      DidShowFullscreenWidget(route_id));
    if (!widget_host_view->HasFocus())
      widget_host_view->Focus();
  } else {
    widget_host_view->InitAsPopup(GetRenderWidgetHostViewPort(), initial_pos);
  }

  RenderWidgetHostImpl* render_widget_host_impl =
      RenderWidgetHostImpl::From(widget_host_view->GetRenderWidgetHost());
  render_widget_host_impl->Init();
  // Only allow privileged mouse lock for fullscreen render widget, which is
  // used to implement Pepper Flash fullscreen.
  render_widget_host_impl->set_allow_privileged_mouse_lock(is_fullscreen);

#if defined(OS_MACOSX)
  // A RenderWidgetHostViewMac has lifetime scoped to the view. Now that it's
  // properly embedded (or purposefully ignored) we can release the retain we
  // took in CreateNewWidget().
  base::mac::NSObjectRelease(widget_host_view->GetNativeView());
#endif
}

WebContentsImpl* WebContentsImpl::GetCreatedWindow(int route_id) {
  PendingContents::iterator iter = pending_contents_.find(route_id);

  // Certain systems can block the creation of new windows. If we didn't succeed
  // in creating one, just return NULL.
  if (iter == pending_contents_.end()) {
    return NULL;
  }

  WebContentsImpl* new_contents = iter->second;
  pending_contents_.erase(route_id);
  RemoveDestructionObserver(new_contents);

  // Don't initialize the guest WebContents immediately.
  if (new_contents->GetRenderProcessHost()->IsGuest())
    return new_contents;

  if (!new_contents->GetRenderProcessHost()->HasConnection() ||
      !new_contents->GetRenderViewHost()->GetView())
    return NULL;

  // TODO(brettw): It seems bogus to reach into here and initialize the host.
  static_cast<RenderViewHostImpl*>(new_contents->GetRenderViewHost())->Init();
  return new_contents;
}

RenderWidgetHostView* WebContentsImpl::GetCreatedWidget(int route_id) {
  PendingWidgetViews::iterator iter = pending_widget_views_.find(route_id);
  if (iter == pending_widget_views_.end()) {
    DCHECK(false);
    return NULL;
  }

  RenderWidgetHostView* widget_host_view = iter->second;
  pending_widget_views_.erase(route_id);

  RenderWidgetHost* widget_host = widget_host_view->GetRenderWidgetHost();
  if (!widget_host->GetProcess()->HasConnection()) {
    // The view has gone away or the renderer crashed. Nothing to do.
    return NULL;
  }

  return widget_host_view;
}

void WebContentsImpl::RequestMediaAccessPermission(
    const MediaStreamRequest& request,
    const MediaResponseCallback& callback) {
  if (delegate_) {
    delegate_->RequestMediaAccessPermission(this, request, callback);
  } else {
    callback.Run(MediaStreamDevices(),
                 MEDIA_DEVICE_INVALID_STATE,
                 scoped_ptr<MediaStreamUI>());
  }
}

SessionStorageNamespace* WebContentsImpl::GetSessionStorageNamespace(
    SiteInstance* instance) {
  return controller_.GetSessionStorageNamespace(instance);
}

FrameTree* WebContentsImpl::GetFrameTree() {
  return &frame_tree_;
}

void WebContentsImpl::AccessibilityEventReceived(
    const std::vector<AXEventNotificationDetails>& details) {
  FOR_EACH_OBSERVER(
      WebContentsObserver, observers_, AccessibilityEventReceived(details));
}

void WebContentsImpl::OnShowValidationMessage(
    const gfx::Rect& anchor_in_root_view,
    const base::string16& main_text,
    const base::string16& sub_text) {
  if (delegate_)
    delegate_->ShowValidationMessage(
        this, anchor_in_root_view, main_text, sub_text);
}

void WebContentsImpl::OnHideValidationMessage() {
  if (delegate_)
    delegate_->HideValidationMessage(this);
}

void WebContentsImpl::OnMoveValidationMessage(
    const gfx::Rect& anchor_in_root_view) {
  if (delegate_)
    delegate_->MoveValidationMessage(this, anchor_in_root_view);
}

void WebContentsImpl::DidSendScreenRects(RenderWidgetHostImpl* rwh) {
  if (browser_plugin_embedder_)
    browser_plugin_embedder_->DidSendScreenRects();
}

void WebContentsImpl::UpdatePreferredSize(const gfx::Size& pref_size) {
  const gfx::Size old_size = GetPreferredSize();
  preferred_size_ = pref_size;
  OnPreferredSizeChanged(old_size);
}

void WebContentsImpl::ResizeDueToAutoResize(const gfx::Size& new_size) {
  if (delegate_)
    delegate_->ResizeDueToAutoResize(this, new_size);
}

WebContents* WebContentsImpl::OpenURL(const OpenURLParams& params) {
  if (!delegate_)
    return NULL;

  WebContents* new_contents = delegate_->OpenURLFromTab(this, params);
  return new_contents;
}

bool WebContentsImpl::Send(IPC::Message* message) {
  if (!GetRenderViewHost()) {
    delete message;
    return false;
  }

  return GetRenderViewHost()->Send(message);
}

bool WebContentsImpl::NavigateToPendingEntry(
    NavigationController::ReloadType reload_type) {
  FrameTreeNode* node = frame_tree_.root();

  // If we are using --site-per-process, we should navigate in the FrameTreeNode
  // specified in the pending entry.
  NavigationEntryImpl* pending_entry =
      NavigationEntryImpl::FromNavigationEntry(controller_.GetPendingEntry());
  if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kSitePerProcess) &&
      pending_entry->frame_tree_node_id() != -1) {
    node = frame_tree_.FindByID(pending_entry->frame_tree_node_id());
  }

  return node->navigator()->NavigateToPendingEntry(
      node->current_frame_host(), reload_type);
}

void WebContentsImpl::RenderFrameForInterstitialPageCreated(
    RenderFrameHost* render_frame_host) {
  FOR_EACH_OBSERVER(WebContentsObserver, observers_,
                    RenderFrameForInterstitialPageCreated(render_frame_host));
}

void WebContentsImpl::AttachInterstitialPage(
    InterstitialPageImpl* interstitial_page) {
  DCHECK(interstitial_page);
  GetRenderManager()->set_interstitial_page(interstitial_page);

  // Cancel any visible dialogs so that they don't interfere with the
  // interstitial.
  if (dialog_manager_)
    dialog_manager_->CancelActiveAndPendingDialogs(this);

  FOR_EACH_OBSERVER(WebContentsObserver, observers_,
                    DidAttachInterstitialPage());
}

void WebContentsImpl::DetachInterstitialPage() {
  if (GetInterstitialPage())
    GetRenderManager()->remove_interstitial_page();
  FOR_EACH_OBSERVER(WebContentsObserver, observers_,
                    DidDetachInterstitialPage());
}

void WebContentsImpl::SetHistoryLengthAndPrune(
    const SiteInstance* site_instance,
    int history_length,
    int32 minimum_page_id) {
  // SetHistoryLengthAndPrune doesn't work when there are pending cross-site
  // navigations. Callers should ensure that this is the case.
  if (GetRenderManager()->pending_render_view_host()) {
    NOTREACHED();
    return;
  }
  RenderViewHostImpl* rvh = GetRenderViewHostImpl();
  if (!rvh) {
    NOTREACHED();
    return;
  }
  if (site_instance && rvh->GetSiteInstance() != site_instance) {
    NOTREACHED();
    return;
  }
  Send(new ViewMsg_SetHistoryLengthAndPrune(GetRoutingID(),
                                            history_length,
                                            minimum_page_id));
}

void WebContentsImpl::ReloadFocusedFrame(bool ignore_cache) {
  RenderFrameHost* focused_frame = GetFocusedFrame();
  if (!focused_frame)
    return;

  Send(new FrameMsg_Reload(focused_frame->GetRoutingID(), ignore_cache));
}

void WebContentsImpl::Replace(const base::string16& word) {
  RenderFrameHost* focused_frame = GetFocusedFrame();
  if (!focused_frame)
    return;

  Send(new InputMsg_Replace(focused_frame->GetRoutingID(), word));
}

void WebContentsImpl::ReplaceMisspelling(const base::string16& word) {
  RenderFrameHost* focused_frame = GetFocusedFrame();
  if (!focused_frame)
    return;

  Send(new InputMsg_ReplaceMisspelling(focused_frame->GetRoutingID(), word));
}

void WebContentsImpl::FocusThroughTabTraversal(bool reverse) {
  if (ShowingInterstitialPage()) {
    GetRenderManager()->interstitial_page()->FocusThroughTabTraversal(reverse);
    return;
  }
  GetRenderViewHostImpl()->SetInitialFocus(reverse);
}

bool WebContentsImpl::ShowingInterstitialPage() const {
  return GetRenderManager()->interstitial_page() != NULL;
}

InterstitialPage* WebContentsImpl::GetInterstitialPage() const {
  return GetRenderManager()->interstitial_page();
}

bool WebContentsImpl::IsSavable() {
  // WebKit creates Document object when MIME type is application/xhtml+xml,
  // so we also support this MIME type.
  return contents_mime_type_ == "text/html" ||
         contents_mime_type_ == "text/xml" ||
         contents_mime_type_ == "application/xhtml+xml" ||
         contents_mime_type_ == "text/plain" ||
         contents_mime_type_ == "text/css" ||
         net::IsSupportedJavascriptMimeType(contents_mime_type_.c_str());
}

void WebContentsImpl::OnSavePage() {
  // If we can not save the page, try to download it.
  if (!IsSavable()) {
    RecordDownloadSource(INITIATED_BY_SAVE_PACKAGE_ON_NON_HTML);
    SaveFrame(GetURL(), Referrer());
    return;
  }

  Stop();

  // Create the save package and possibly prompt the user for the name to save
  // the page as. The user prompt is an asynchronous operation that runs on
  // another thread.
  save_package_ = new SavePackage(this);
  save_package_->GetSaveInfo();
}

// Used in automated testing to bypass prompting the user for file names.
// Instead, the names and paths are hard coded rather than running them through
// file name sanitation and extension / mime checking.
bool WebContentsImpl::SavePage(const base::FilePath& main_file,
                               const base::FilePath& dir_path,
                               SavePageType save_type) {
  // Stop the page from navigating.
  Stop();

  save_package_ = new SavePackage(this, save_type, main_file, dir_path);
  return save_package_->Init(SavePackageDownloadCreatedCallback());
}

void WebContentsImpl::SaveFrame(const GURL& url,
                                const Referrer& referrer) {
  if (!GetURL().is_valid())
    return;
  bool is_main_frame = (url == GetURL());

  DownloadManager* dlm =
      BrowserContext::GetDownloadManager(GetBrowserContext());
  if (!dlm)
    return;
  int64 post_id = -1;
  if (is_main_frame) {
    const NavigationEntry* entry = controller_.GetLastCommittedEntry();
    if (entry)
      post_id = entry->GetPostID();
  }
  scoped_ptr<DownloadUrlParameters> params(
      DownloadUrlParameters::FromWebContents(this, url));
  params->set_referrer(referrer);
  params->set_post_id(post_id);
  params->set_prefer_cache(true);
  if (post_id >= 0)
    params->set_method("POST");
  params->set_prompt(true);
  dlm->DownloadUrl(params.Pass());
}

void WebContentsImpl::GenerateMHTML(
    const base::FilePath& file,
    const base::Callback<void(int64)>& callback) {
  MHTMLGenerationManager::GetInstance()->SaveMHTML(this, file, callback);
}

// TODO(nasko): Rename this method to IsVisibleEntry.
bool WebContentsImpl::IsActiveEntry(int32 page_id) {
  NavigationEntryImpl* visible_entry =
      NavigationEntryImpl::FromNavigationEntry(controller_.GetVisibleEntry());
  return (visible_entry != NULL &&
          visible_entry->site_instance() == GetSiteInstance() &&
          visible_entry->GetPageID() == page_id);
}

const std::string& WebContentsImpl::GetContentsMimeType() const {
  return contents_mime_type_;
}

bool WebContentsImpl::WillNotifyDisconnection() const {
  return notify_disconnection_;
}

void WebContentsImpl::SetOverrideEncoding(const std::string& encoding) {
  SetEncoding(encoding);
  Send(new ViewMsg_SetPageEncoding(GetRoutingID(), encoding));
}

void WebContentsImpl::ResetOverrideEncoding() {
  encoding_.clear();
  Send(new ViewMsg_ResetPageEncodingToDefault(GetRoutingID()));
}

RendererPreferences* WebContentsImpl::GetMutableRendererPrefs() {
  return &renderer_preferences_;
}

void WebContentsImpl::Close() {
  Close(GetRenderViewHost());
}

void WebContentsImpl::DragSourceEndedAt(int client_x, int client_y,
    int screen_x, int screen_y, blink::WebDragOperation operation) {
  if (browser_plugin_embedder_.get())
    browser_plugin_embedder_->DragSourceEndedAt(client_x, client_y,
        screen_x, screen_y, operation);
  if (GetRenderViewHost())
    GetRenderViewHostImpl()->DragSourceEndedAt(client_x, client_y,
        screen_x, screen_y, operation);
}

void WebContentsImpl::DidGetResourceResponseStart(
  const ResourceRequestDetails& details) {
  controller_.ssl_manager()->DidStartResourceResponse(details);

  FOR_EACH_OBSERVER(WebContentsObserver, observers_,
                    DidGetResourceResponseStart(details));

  // TODO(avi): Remove. http://crbug.com/170921
  NotificationService::current()->Notify(
      NOTIFICATION_RESOURCE_RESPONSE_STARTED,
      Source<WebContents>(this),
      Details<const ResourceRequestDetails>(&details));
}

void WebContentsImpl::DidGetRedirectForResourceRequest(
  RenderViewHost* render_view_host,
  const ResourceRedirectDetails& details) {
  controller_.ssl_manager()->DidReceiveResourceRedirect(details);

  FOR_EACH_OBSERVER(
      WebContentsObserver,
      observers_,
      DidGetRedirectForResourceRequest(render_view_host, details));

  // TODO(avi): Remove. http://crbug.com/170921
  NotificationService::current()->Notify(
      NOTIFICATION_RESOURCE_RECEIVED_REDIRECT,
      Source<WebContents>(this),
      Details<const ResourceRedirectDetails>(&details));
}

void WebContentsImpl::SystemDragEnded() {
  if (GetRenderViewHost())
    GetRenderViewHostImpl()->DragSourceSystemDragEnded();
  if (delegate_)
    delegate_->DragEnded();
  if (browser_plugin_embedder_.get())
    browser_plugin_embedder_->SystemDragEnded();
}

void WebContentsImpl::UserGestureDone() {
  OnUserGesture();
}

void WebContentsImpl::SetClosedByUserGesture(bool value) {
  closed_by_user_gesture_ = value;
}

bool WebContentsImpl::GetClosedByUserGesture() const {
  return closed_by_user_gesture_;
}

double WebContentsImpl::GetZoomLevel() const {
  HostZoomMapImpl* zoom_map = static_cast<HostZoomMapImpl*>(
      HostZoomMap::GetForBrowserContext(GetBrowserContext()));
  if (!zoom_map)
    return 0;

  double zoom_level;
  if (temporary_zoom_settings_) {
    zoom_level = zoom_map->GetTemporaryZoomLevel(
        GetRenderProcessHost()->GetID(), GetRenderViewHost()->GetRoutingID());
  } else {
    GURL url;
    NavigationEntry* entry = GetController().GetLastCommittedEntry();
    // Since zoom map is updated using rewritten URL, use rewritten URL
    // to get the zoom level.
    url = entry ? entry->GetURL() : GURL::EmptyGURL();
    zoom_level = zoom_map->GetZoomLevelForHostAndScheme(url.scheme(),
        net::GetHostOrSpecFromURL(url));
  }
  return zoom_level;
}

int WebContentsImpl::GetZoomPercent(bool* enable_increment,
                                    bool* enable_decrement) const {
  *enable_decrement = *enable_increment = false;
  // Calculate the zoom percent from the factor. Round up to the nearest whole
  // number.
  int percent = static_cast<int>(
      ZoomLevelToZoomFactor(GetZoomLevel()) * 100 + 0.5);
  *enable_decrement = percent > minimum_zoom_percent_;
  *enable_increment = percent < maximum_zoom_percent_;
  return percent;
}

void WebContentsImpl::ViewSource() {
  if (!delegate_)
    return;

  NavigationEntry* entry = GetController().GetLastCommittedEntry();
  if (!entry)
    return;

  delegate_->ViewSourceForTab(this, entry->GetURL());
}

void WebContentsImpl::ViewFrameSource(const GURL& url,
                                      const PageState& page_state) {
  if (!delegate_)
    return;

  delegate_->ViewSourceForFrame(this, url, page_state);
}

int WebContentsImpl::GetMinimumZoomPercent() const {
  return minimum_zoom_percent_;
}

int WebContentsImpl::GetMaximumZoomPercent() const {
  return maximum_zoom_percent_;
}

gfx::Size WebContentsImpl::GetPreferredSize() const {
  return capturer_count_ == 0 ? preferred_size_ : preferred_size_for_capture_;
}

bool WebContentsImpl::GotResponseToLockMouseRequest(bool allowed) {
  return GetRenderViewHost() ?
      GetRenderViewHostImpl()->GotResponseToLockMouseRequest(allowed) : false;
}

bool WebContentsImpl::HasOpener() const {
  return opener_ != NULL;
}

void WebContentsImpl::DidChooseColorInColorChooser(SkColor color) {
  Send(new ViewMsg_DidChooseColorResponse(
      GetRoutingID(), color_chooser_identifier_, color));
}

void WebContentsImpl::DidEndColorChooser() {
  Send(new ViewMsg_DidEndColorChooser(GetRoutingID(),
                                      color_chooser_identifier_));
  color_chooser_.reset();
  color_chooser_identifier_ = 0;
}

int WebContentsImpl::DownloadImage(const GURL& url,
                                   bool is_favicon,
                                   uint32_t max_bitmap_size,
                                   const ImageDownloadCallback& callback) {
  int id = StartDownload(GetMainFrame(), url, is_favicon, max_bitmap_size);
  image_download_map_[id] = callback;
  return id;
}

bool WebContentsImpl::IsSubframe() const {
  return is_subframe_;
}

void WebContentsImpl::SetZoomLevel(double level) {
  Send(new ViewMsg_SetZoomLevel(GetRoutingID(), level));
  BrowserPluginEmbedder* embedder = GetBrowserPluginEmbedder();
  if (embedder)
    embedder->SetZoomLevel(level);
}

void WebContentsImpl::Find(int request_id,
                           const base::string16& search_text,
                           const blink::WebFindOptions& options) {
  Send(new ViewMsg_Find(GetRoutingID(), request_id, search_text, options));
}

void WebContentsImpl::StopFinding(StopFindAction action) {
  Send(new ViewMsg_StopFinding(GetRoutingID(), action));
}

bool WebContentsImpl::FocusLocationBarByDefault() {
  NavigationEntry* entry = controller_.GetVisibleEntry();
  if (entry && entry->GetURL() == GURL(kAboutBlankURL))
    return true;
  return delegate_ && delegate_->ShouldFocusLocationBarByDefault(this);
}

void WebContentsImpl::SetFocusToLocationBar(bool select_all) {
  if (delegate_)
    delegate_->SetFocusToLocationBar(select_all);
}

void WebContentsImpl::DidStartProvisionalLoad(
    RenderFrameHostImpl* render_frame_host,
    int parent_routing_id,
    const GURL& validated_url,
    bool is_error_page,
    bool is_iframe_srcdoc) {
  bool is_main_frame = render_frame_host->frame_tree_node()->IsMainFrame();
  if (is_main_frame)
    DidChangeLoadProgress(0);

  // Notify observers about the start of the provisional load.
  int render_frame_id = render_frame_host->GetRoutingID();
  RenderViewHost* render_view_host = render_frame_host->render_view_host();
  FOR_EACH_OBSERVER(WebContentsObserver, observers_,
                    DidStartProvisionalLoadForFrame(
                        render_frame_id, parent_routing_id, is_main_frame,
                        validated_url, is_error_page, is_iframe_srcdoc,
                        render_view_host));

  if (is_main_frame) {
    FOR_EACH_OBSERVER(
        WebContentsObserver,
        observers_,
        ProvisionalChangeToMainFrameUrl(validated_url,
                                        render_frame_host));
  }
}

void WebContentsImpl::DidFailProvisionalLoadWithError(
    RenderFrameHostImpl* render_frame_host,
    const FrameHostMsg_DidFailProvisionalLoadWithError_Params& params) {
  GURL validated_url(params.url);
  int render_frame_id = render_frame_host->GetRoutingID();
  bool is_main_frame = render_frame_host->frame_tree_node()->IsMainFrame();
  RenderViewHost* render_view_host = render_frame_host->render_view_host();
  FOR_EACH_OBSERVER(
      WebContentsObserver,
      observers_,
      DidFailProvisionalLoad(render_frame_id,
                             params.frame_unique_name,
                             is_main_frame,
                             validated_url,
                             params.error_code,
                             params.error_description,
                             render_view_host));
}

void WebContentsImpl::DidFailLoadWithError(
    RenderFrameHostImpl* render_frame_host,
    const GURL& url,
    int error_code,
    const base::string16& error_description) {
  int render_frame_id = render_frame_host->GetRoutingID();
  bool is_main_frame = render_frame_host->frame_tree_node()->IsMainFrame();
  RenderViewHost* render_view_host = render_frame_host->render_view_host();
  FOR_EACH_OBSERVER(WebContentsObserver, observers_,
                    DidFailLoad(render_frame_id, url, is_main_frame, error_code,
                                error_description, render_view_host));
}

void WebContentsImpl::NotifyChangedNavigationState(
    InvalidateTypes changed_flags) {
  NotifyNavigationStateChanged(changed_flags);
}

void WebContentsImpl::AboutToNavigateRenderFrame(
      RenderFrameHostImpl* render_frame_host) {
  // Notify observers that we will navigate in this RenderView.
  RenderViewHost* render_view_host = render_frame_host->render_view_host();
  FOR_EACH_OBSERVER(
      WebContentsObserver,
      observers_,
      AboutToNavigateRenderView(render_view_host));
}

void WebContentsImpl::DidStartNavigationToPendingEntry(
      RenderFrameHostImpl* render_frame_host,
      const GURL& url,
      NavigationController::ReloadType reload_type) {
  // Notify observers about navigation.
  FOR_EACH_OBSERVER(
      WebContentsObserver,
      observers_,
      DidStartNavigationToPendingEntry(url, reload_type));
}

void WebContentsImpl::RequestOpenURL(RenderFrameHostImpl* render_frame_host,
                                     const OpenURLParams& params) {
  int source_render_frame_id = render_frame_host->GetRoutingID();
  WebContents* new_contents = OpenURL(params);

  if (new_contents) {
    // Notify observers.
    FOR_EACH_OBSERVER(WebContentsObserver, observers_,
                      DidOpenRequestedURL(new_contents,
                                          params.url,
                                          params.referrer,
                                          params.disposition,
                                          params.transition,
                                          source_render_frame_id));
  }
}

void WebContentsImpl::DidRedirectProvisionalLoad(
    RenderFrameHostImpl* render_frame_host,
    const GURL& validated_target_url) {
  // Notify observers about the provisional change in the main frame URL.
  FOR_EACH_OBSERVER(
      WebContentsObserver,
      observers_,
      ProvisionalChangeToMainFrameUrl(validated_target_url,
                                      render_frame_host));
}

void WebContentsImpl::DidCommitProvisionalLoad(
    RenderFrameHostImpl* render_frame_host,
    const base::string16& frame_unique_name,
    bool is_main_frame,
    const GURL& url,
    PageTransition transition_type) {
  int render_frame_id = render_frame_host->GetRoutingID();
  RenderViewHost* render_view_host = render_frame_host->render_view_host();
  // Notify observers about the commit of the provisional load.
  FOR_EACH_OBSERVER(
      WebContentsObserver,
      observers_,
      DidCommitProvisionalLoadForFrame(render_frame_id,
                                       frame_unique_name,
                                       is_main_frame,
                                       url,
                                       transition_type,
                                       render_view_host));
}

void WebContentsImpl::DidNavigateMainFramePreCommit(
    const FrameHostMsg_DidCommitProvisionalLoad_Params& params) {
  // Ensure fullscreen mode is exited before committing the navigation to a
  // different page.  The next page will not start out assuming it is in
  // fullscreen mode.
  if (params.was_within_same_page) {
    // No document change?  Then, the renderer shall decide whether to exit
    // fullscreen.
    return;
  }
  if (IsFullscreenForCurrentTab())
    GetRenderViewHost()->ExitFullscreen();
  DCHECK(!IsFullscreenForCurrentTab());
}

void WebContentsImpl::DidNavigateMainFramePostCommit(
    const LoadCommittedDetails& details,
    const FrameHostMsg_DidCommitProvisionalLoad_Params& params) {
  if (details.is_navigation_to_different_page()) {
    // Clear the status bubble. This is a workaround for a bug where WebKit
    // doesn't let us know that the cursor left an element during a
    // transition (this is also why the mouse cursor remains as a hand after
    // clicking on a link); see bugs 1184641 and 980803. We don't want to
    // clear the bubble when a user navigates to a named anchor in the same
    // page.
    UpdateTargetURL(details.entry->GetPageID(), GURL());
  }

  if (!details.is_in_page) {
    // Once the main frame is navigated, we're no longer considered to have
    // displayed insecure content.
    displayed_insecure_content_ = false;
    SSLManager::NotifySSLInternalStateChanged(
        GetController().GetBrowserContext());
  }

  // Notify observers about navigation.
  FOR_EACH_OBSERVER(WebContentsObserver, observers_,
                    DidNavigateMainFrame(details, params));

  if (delegate_) {
    delegate_->DidNavigateMainFramePostCommit(this);
    view_->SetOverscrollControllerEnabled(delegate_->CanOverscrollContent());
  }
}

void WebContentsImpl::DidNavigateAnyFramePostCommit(
    RenderFrameHostImpl* render_frame_host,
    const LoadCommittedDetails& details,
    const FrameHostMsg_DidCommitProvisionalLoad_Params& params) {
  // If we navigate off the page, close all JavaScript dialogs.
  if (dialog_manager_ && !details.is_in_page)
    dialog_manager_->CancelActiveAndPendingDialogs(this);

  // Notify observers about navigation.
  FOR_EACH_OBSERVER(WebContentsObserver, observers_,
                    DidNavigateAnyFrame(details, params));
}

void WebContentsImpl::SetMainFrameMimeType(const std::string& mime_type) {
  contents_mime_type_ = mime_type;
}

bool WebContentsImpl::CanOverscrollContent() {
  if (delegate_)
    return delegate_->CanOverscrollContent();

  return false;
}

void WebContentsImpl::OnDidLoadResourceFromMemoryCache(
    const GURL& url,
    const std::string& security_info,
    const std::string& http_method,
    const std::string& mime_type,
    ResourceType::Type resource_type) {
  base::StatsCounter cache("WebKit.CacheHit");
  cache.Increment();

  // Send out a notification that we loaded a resource from our memory cache.
  int cert_id = 0;
  net::CertStatus cert_status = 0;
  int security_bits = -1;
  int connection_status = 0;
  SignedCertificateTimestampIDStatusList signed_certificate_timestamp_ids;
  DeserializeSecurityInfo(security_info, &cert_id, &cert_status,
                          &security_bits, &connection_status,
                          &signed_certificate_timestamp_ids);
  // TODO(alcutter,eranm): Pass signed_certificate_timestamp_ids into details
  LoadFromMemoryCacheDetails details(
      url, GetRenderProcessHost()->GetID(), cert_id, cert_status, http_method,
      mime_type, resource_type);

  controller_.ssl_manager()->DidLoadFromMemoryCache(details);

  FOR_EACH_OBSERVER(WebContentsObserver, observers_,
                    DidLoadResourceFromMemoryCache(details));

  if (url.is_valid() && url.SchemeIsHTTPOrHTTPS()) {
    scoped_refptr<net::URLRequestContextGetter> request_context(
        resource_type == ResourceType::MEDIA ?
            GetBrowserContext()->GetMediaRequestContextForRenderProcess(
                GetRenderProcessHost()->GetID()) :
            GetBrowserContext()->GetRequestContextForRenderProcess(
                GetRenderProcessHost()->GetID()));
    BrowserThread::PostTask(
        BrowserThread::IO,
        FROM_HERE,
        base::Bind(&NotifyCacheOnIO, request_context, url, http_method));
  }
}

void WebContentsImpl::OnDidDisplayInsecureContent() {
  RecordAction(base::UserMetricsAction("SSL.DisplayedInsecureContent"));
  displayed_insecure_content_ = true;
  SSLManager::NotifySSLInternalStateChanged(
      GetController().GetBrowserContext());
}

void WebContentsImpl::OnDidRunInsecureContent(
    const std::string& security_origin, const GURL& target_url) {
  LOG(WARNING) << security_origin << " ran insecure content from "
               << target_url.possibly_invalid_spec();
  RecordAction(base::UserMetricsAction("SSL.RanInsecureContent"));
  if (EndsWith(security_origin, kDotGoogleDotCom, false))
    RecordAction(base::UserMetricsAction("SSL.RanInsecureContentGoogle"));
  controller_.ssl_manager()->DidRunInsecureContent(security_origin);
  displayed_insecure_content_ = true;
  SSLManager::NotifySSLInternalStateChanged(
      GetController().GetBrowserContext());
}

void WebContentsImpl::OnDocumentLoadedInFrame() {
  CHECK(render_frame_message_source_);
  CHECK(!render_view_message_source_);
  RenderFrameHostImpl* rfh =
      static_cast<RenderFrameHostImpl*>(render_frame_message_source_);

  int render_frame_id = rfh->GetRoutingID();
  RenderViewHost* render_view_host = rfh->render_view_host();
  FOR_EACH_OBSERVER(WebContentsObserver,
                    observers_,
                    DocumentLoadedInFrame(render_frame_id, render_view_host));
}

void WebContentsImpl::OnDidFinishLoad(
    const GURL& url) {
  if (!render_frame_message_source_) {
    RecordAction(base::UserMetricsAction("BadMessageTerminate_RVD2"));
    GetRenderProcessHost()->ReceivedBadMessage();
    return;
  }

  GURL validated_url(url);
  RenderProcessHost* render_process_host =
      render_frame_message_source_->GetProcess();
  render_process_host->FilterURL(false, &validated_url);

  RenderFrameHostImpl* rfh =
      static_cast<RenderFrameHostImpl*>(render_frame_message_source_);
  int render_frame_id = rfh->GetRoutingID();
  RenderViewHost* render_view_host = rfh->render_view_host();
  bool is_main_frame = rfh->frame_tree_node()->IsMainFrame();
  FOR_EACH_OBSERVER(WebContentsObserver, observers_,
                    DidFinishLoad(render_frame_id, validated_url,
                                  is_main_frame, render_view_host));
}

void WebContentsImpl::OnGoToEntryAtOffset(int offset) {
  if (!delegate_ || delegate_->OnGoToEntryOffset(offset))
    controller_.GoToOffset(offset);
}

void WebContentsImpl::OnUpdateZoomLimits(int minimum_percent,
                                         int maximum_percent,
                                         bool remember) {
  minimum_zoom_percent_ = minimum_percent;
  maximum_zoom_percent_ = maximum_percent;
  temporary_zoom_settings_ = !remember;
}

void WebContentsImpl::OnEnumerateDirectory(int request_id,
                                           const base::FilePath& path) {
  if (!delegate_)
    return;

  ChildProcessSecurityPolicyImpl* policy =
      ChildProcessSecurityPolicyImpl::GetInstance();
  if (policy->CanReadFile(GetRenderProcessHost()->GetID(), path))
    delegate_->EnumerateDirectory(this, request_id, path);
}

void WebContentsImpl::OnRegisterProtocolHandler(const std::string& protocol,
                                                const GURL& url,
                                                const base::string16& title,
                                                bool user_gesture) {
  if (!delegate_)
    return;

  ChildProcessSecurityPolicyImpl* policy =
      ChildProcessSecurityPolicyImpl::GetInstance();
  if (policy->IsPseudoScheme(protocol))
    return;

  delegate_->RegisterProtocolHandler(this, protocol, url, title, user_gesture);
}

void WebContentsImpl::OnFindReply(int request_id,
                                  int number_of_matches,
                                  const gfx::Rect& selection_rect,
                                  int active_match_ordinal,
                                  bool final_update) {
  if (delegate_) {
    delegate_->FindReply(this, request_id, number_of_matches, selection_rect,
                         active_match_ordinal, final_update);
  }
}

#if defined(OS_ANDROID)
void WebContentsImpl::OnFindMatchRectsReply(
    int version,
    const std::vector<gfx::RectF>& rects,
    const gfx::RectF& active_rect) {
  if (delegate_)
    delegate_->FindMatchRectsReply(this, version, rects, active_rect);
}

void WebContentsImpl::OnOpenDateTimeDialog(
    const ViewHostMsg_DateTimeDialogValue_Params& value) {
  date_time_chooser_->ShowDialog(ContentViewCore::FromWebContents(this),
                                 GetRenderViewHost(),
                                 value.dialog_type,
                                 value.dialog_value,
                                 value.minimum,
                                 value.maximum,
                                 value.step,
                                 value.suggestions);
}

void WebContentsImpl::OnJavaBridgeGetChannelHandle(IPC::Message* reply_msg) {
  java_bridge_dispatcher_host_manager_->OnGetChannelHandle(
      render_frame_message_source_, reply_msg);
}

#endif

void WebContentsImpl::OnPepperPluginHung(int plugin_child_id,
                                         const base::FilePath& path,
                                         bool is_hung) {
  UMA_HISTOGRAM_COUNTS("Pepper.PluginHung", 1);

  FOR_EACH_OBSERVER(WebContentsObserver, observers_,
                    PluginHungStatusChanged(plugin_child_id, path, is_hung));
}

void WebContentsImpl::OnPluginCrashed(const base::FilePath& plugin_path,
                                      base::ProcessId plugin_pid) {
  FOR_EACH_OBSERVER(WebContentsObserver, observers_,
                    PluginCrashed(plugin_path, plugin_pid));
}

void WebContentsImpl::OnDomOperationResponse(const std::string& json_string,
                                             int automation_id) {
  DomOperationNotificationDetails details(json_string, automation_id);
  NotificationService::current()->Notify(
      NOTIFICATION_DOM_OPERATION_RESPONSE,
      Source<WebContents>(this),
      Details<DomOperationNotificationDetails>(&details));
}

void WebContentsImpl::OnAppCacheAccessed(const GURL& manifest_url,
                                         bool blocked_by_policy) {
  // Notify observers about navigation.
  FOR_EACH_OBSERVER(WebContentsObserver, observers_,
                    AppCacheAccessed(manifest_url, blocked_by_policy));
}

void WebContentsImpl::OnOpenColorChooser(
      int color_chooser_id,
      SkColor color,
      const std::vector<ColorSuggestion>& suggestions) {
  ColorChooser* new_color_chooser =
      delegate_->OpenColorChooser(this, color, suggestions);
  if (!new_color_chooser)
    return;
  if (color_chooser_)
    color_chooser_->End();
  color_chooser_.reset(new_color_chooser);
  color_chooser_identifier_ = color_chooser_id;
}

void WebContentsImpl::OnEndColorChooser(int color_chooser_id) {
  if (color_chooser_ &&
      color_chooser_id == color_chooser_identifier_)
    color_chooser_->End();
}

void WebContentsImpl::OnSetSelectedColorInColorChooser(int color_chooser_id,
                                                       SkColor color) {
  if (color_chooser_ &&
      color_chooser_id == color_chooser_identifier_)
    color_chooser_->SetSelectedColor(color);
}

// This exists for render views that don't have a WebUI, but do have WebUI
// bindings enabled.
void WebContentsImpl::OnWebUISend(const GURL& source_url,
                                  const std::string& name,
                                  const base::ListValue& args) {
  if (delegate_)
    delegate_->WebUISend(this, source_url, name, args);
}

void WebContentsImpl::OnRequestPpapiBrokerPermission(
    int routing_id,
    const GURL& url,
    const base::FilePath& plugin_path) {
  if (!delegate_) {
    OnPpapiBrokerPermissionResult(routing_id, false);
    return;
  }

  if (!delegate_->RequestPpapiBrokerPermission(
      this, url, plugin_path,
      base::Bind(&WebContentsImpl::OnPpapiBrokerPermissionResult,
                 base::Unretained(this), routing_id))) {
    NOTIMPLEMENTED();
    OnPpapiBrokerPermissionResult(routing_id, false);
  }
}

void WebContentsImpl::OnPpapiBrokerPermissionResult(int routing_id,
                                                    bool result) {
  Send(new ViewMsg_PpapiBrokerPermissionResult(routing_id, result));
}

void WebContentsImpl::OnBrowserPluginMessage(const IPC::Message& message) {
  // This creates a BrowserPluginEmbedder, which handles all the BrowserPlugin
  // specific messages for this WebContents. This means that any message from
  // a BrowserPlugin prior to this will be ignored.
  // For more info, see comment above classes BrowserPluginEmbedder and
  // BrowserPluginGuest.
  CHECK(!browser_plugin_embedder_.get());
  browser_plugin_embedder_.reset(BrowserPluginEmbedder::Create(this));
  browser_plugin_embedder_->OnMessageReceived(message);
}

void WebContentsImpl::OnDidDownloadImage(
    int id,
    int http_status_code,
    const GURL& image_url,
    const std::vector<SkBitmap>& bitmaps,
    const std::vector<gfx::Size>& original_bitmap_sizes) {
  if (bitmaps.size() != original_bitmap_sizes.size())
    return;

  ImageDownloadMap::iterator iter = image_download_map_.find(id);
  if (iter == image_download_map_.end()) {
    // Currently WebContents notifies us of ANY downloads so that it is
    // possible to get here.
    return;
  }
  if (!iter->second.is_null()) {
    iter->second.Run(
        id, http_status_code, image_url, bitmaps, original_bitmap_sizes);
  }
  image_download_map_.erase(id);
}

void WebContentsImpl::OnUpdateFaviconURL(
    int32 page_id,
    const std::vector<FaviconURL>& candidates) {
  FOR_EACH_OBSERVER(WebContentsObserver, observers_,
                    DidUpdateFaviconURL(page_id, candidates));
}

void WebContentsImpl::OnMediaPlayingNotification(int64 player_cookie,
                                                 bool has_video,
                                                 bool has_audio) {
// Chrome OS does its own detection of audio and video.
#if !defined(OS_CHROMEOS)
  scoped_ptr<PowerSaveBlocker> blocker;
  if (has_video) {
    blocker = PowerSaveBlocker::Create(
        PowerSaveBlocker::kPowerSaveBlockPreventDisplaySleep, "Playing video");
#if defined(OS_ANDROID)
    static_cast<PowerSaveBlockerImpl*>(blocker.get())
        ->InitDisplaySleepBlocker(GetView()->GetNativeView());
#endif
  } else if (has_audio) {
    blocker = PowerSaveBlocker::Create(
        PowerSaveBlocker::kPowerSaveBlockPreventAppSuspension, "Playing audio");
  }

  if (blocker) {
    power_save_blockers_[render_view_message_source_][player_cookie] =
        blocker.release();
  }
#endif  // !defined(OS_CHROMEOS)
}

void WebContentsImpl::OnMediaPausedNotification(int64 player_cookie) {
  // Chrome OS does its own detection of audio and video.
#if !defined(OS_CHROMEOS)
  delete power_save_blockers_[render_view_message_source_][player_cookie];
  power_save_blockers_[render_view_message_source_].erase(player_cookie);
#endif  // !defined(OS_CHROMEOS)
}

void WebContentsImpl::OnFirstVisuallyNonEmptyPaint(int32 page_id) {
  FOR_EACH_OBSERVER(WebContentsObserver, observers_,
                    DidFirstVisuallyNonEmptyPaint(page_id));
}

void WebContentsImpl::DidChangeVisibleSSLState() {
  FOR_EACH_OBSERVER(WebContentsObserver, observers_,
                    DidChangeVisibleSSLState());
}

void WebContentsImpl::NotifyBeforeFormRepostWarningShow() {
  FOR_EACH_OBSERVER(WebContentsObserver, observers_,
                    BeforeFormRepostWarningShow());
}


void WebContentsImpl::ActivateAndShowRepostFormWarningDialog() {
  Activate();
  if (delegate_)
    delegate_->ShowRepostFormWarningDialog(this);
}

// Notifies the RenderWidgetHost instance about the fact that the page is
// loading, or done loading.
void WebContentsImpl::SetIsLoading(RenderViewHost* render_view_host,
                                   bool is_loading,
                                   bool to_different_document,
                                   LoadNotificationDetails* details) {
  if (is_loading == is_loading_)
    return;

  if (!is_loading) {
    load_state_ = net::LoadStateWithParam(net::LOAD_STATE_IDLE,
                                          base::string16());
    load_state_host_.clear();
    upload_size_ = 0;
    upload_position_ = 0;
  }

  GetRenderManager()->SetIsLoading(is_loading);

  is_loading_ = is_loading;
  waiting_for_response_ = is_loading;

  if (delegate_)
    delegate_->LoadingStateChanged(this, to_different_document);
  NotifyNavigationStateChanged(INVALIDATE_TYPE_LOAD);

  std::string url = (details ? details->url.possibly_invalid_spec() : "NULL");
  if (is_loading) {
    TRACE_EVENT_ASYNC_BEGIN1("browser", "WebContentsImpl Loading", this,
                             "URL", url);
    FOR_EACH_OBSERVER(WebContentsObserver, observers_,
                      DidStartLoading(render_view_host));
  } else {
    TRACE_EVENT_ASYNC_END1("browser", "WebContentsImpl Loading", this,
                           "URL", url);
    FOR_EACH_OBSERVER(WebContentsObserver, observers_,
                      DidStopLoading(render_view_host));
  }

  // TODO(avi): Remove. http://crbug.com/170921
  int type = is_loading ? NOTIFICATION_LOAD_START : NOTIFICATION_LOAD_STOP;
  NotificationDetails det = NotificationService::NoDetails();
  if (details)
      det = Details<LoadNotificationDetails>(details);
  NotificationService::current()->Notify(
      type, Source<NavigationController>(&controller_), det);
}

void WebContentsImpl::UpdateMaxPageIDIfNecessary(RenderViewHost* rvh) {
  // If we are creating a RVH for a restored controller, then we need to make
  // sure the RenderView starts with a next_page_id_ larger than the number
  // of restored entries.  This must be called before the RenderView starts
  // navigating (to avoid a race between the browser updating max_page_id and
  // the renderer updating next_page_id_).  Because of this, we only call this
  // from CreateRenderView and allow that to notify the RenderView for us.
  int max_restored_page_id = controller_.GetMaxRestoredPageID();
  if (max_restored_page_id >
      GetMaxPageIDForSiteInstance(rvh->GetSiteInstance()))
    UpdateMaxPageIDForSiteInstance(rvh->GetSiteInstance(),
                                   max_restored_page_id);
}

bool WebContentsImpl::UpdateTitleForEntry(NavigationEntryImpl* entry,
                                          const base::string16& title) {
  // For file URLs without a title, use the pathname instead. In the case of a
  // synthesized title, we don't want the update to count toward the "one set
  // per page of the title to history."
  base::string16 final_title;
  bool explicit_set;
  if (entry && entry->GetURL().SchemeIsFile() && title.empty()) {
    final_title = base::UTF8ToUTF16(entry->GetURL().ExtractFileName());
    explicit_set = false;  // Don't count synthetic titles toward the set limit.
  } else {
    base::TrimWhitespace(title, base::TRIM_ALL, &final_title);
    explicit_set = true;
  }

  // If a page is created via window.open and never navigated,
  // there will be no navigation entry. In this situation,
  // |page_title_when_no_navigation_entry_| will be used for page title.
  if (entry) {
    if (final_title == entry->GetTitle())
      return false;  // Nothing changed, don't bother.

    entry->SetTitle(final_title);
  } else {
    if (page_title_when_no_navigation_entry_ == final_title)
      return false;  // Nothing changed, don't bother.

    page_title_when_no_navigation_entry_ = final_title;
  }

  // Lastly, set the title for the view.
  view_->SetPageTitle(final_title);

  FOR_EACH_OBSERVER(WebContentsObserver, observers_,
                    TitleWasSet(entry, explicit_set));

  // TODO(avi): Remove. http://crbug.com/170921
  std::pair<NavigationEntry*, bool> details =
      std::make_pair(entry, explicit_set);
  NotificationService::current()->Notify(
      NOTIFICATION_WEB_CONTENTS_TITLE_UPDATED,
      Source<WebContents>(this),
      Details<std::pair<NavigationEntry*, bool> >(&details));

  return true;
}

void WebContentsImpl::NotifySwapped(RenderViewHost* old_host,
                                    RenderViewHost* new_host) {
  // After sending out a swap notification, we need to send a disconnect
  // notification so that clients that pick up a pointer to |this| can NULL the
  // pointer.  See Bug 1230284.
  notify_disconnection_ = true;
  FOR_EACH_OBSERVER(WebContentsObserver, observers_,
                    RenderViewHostChanged(old_host, new_host));

  // TODO(avi): Remove. http://crbug.com/170921
  std::pair<RenderViewHost*, RenderViewHost*> details =
      std::make_pair(old_host, new_host);
  NotificationService::current()->Notify(
      NOTIFICATION_RENDER_VIEW_HOST_CHANGED,
      Source<WebContents>(this),
      Details<std::pair<RenderViewHost*, RenderViewHost*> >(&details));

  // Ensure that the associated embedder gets cleared after a RenderViewHost
  // gets swapped, so we don't reuse the same embedder next time a
  // RenderViewHost is attached to this WebContents.
  RemoveBrowserPluginEmbedder();
}

// TODO(avi): Remove this entire function because this notification is already
// covered by two observer functions. http://crbug.com/170921
void WebContentsImpl::NotifyDisconnected() {
  if (!notify_disconnection_)
    return;

  notify_disconnection_ = false;
  NotificationService::current()->Notify(
      NOTIFICATION_WEB_CONTENTS_DISCONNECTED,
      Source<WebContents>(this),
      NotificationService::NoDetails());
}

void WebContentsImpl::NotifyNavigationEntryCommitted(
    const LoadCommittedDetails& load_details) {
  FOR_EACH_OBSERVER(
      WebContentsObserver, observers_, NavigationEntryCommitted(load_details));
}

bool WebContentsImpl::OnMessageReceived(RenderFrameHost* render_frame_host,
                                        const IPC::Message& message) {
  return OnMessageReceived(NULL, render_frame_host, message);
}

const GURL& WebContentsImpl::GetMainFrameLastCommittedURL() const {
  return GetLastCommittedURL();
}

void WebContentsImpl::RenderFrameCreated(RenderFrameHost* render_frame_host) {
  // Note this is only for subframes, the notification for the main frame
  // happens in RenderViewCreated.
  FOR_EACH_OBSERVER(WebContentsObserver,
                    observers_,
                    RenderFrameCreated(render_frame_host));
}

void WebContentsImpl::RenderFrameDeleted(RenderFrameHost* render_frame_host) {
  FOR_EACH_OBSERVER(WebContentsObserver,
                    observers_,
                    RenderFrameDeleted(render_frame_host));
}

void WebContentsImpl::WorkerCrashed(RenderFrameHost* render_frame_host) {
  if (delegate_)
    delegate_->WorkerCrashed(this);
}

void WebContentsImpl::ShowContextMenu(RenderFrameHost* render_frame_host,
                                      const ContextMenuParams& params) {
  // Allow WebContentsDelegates to handle the context menu operation first.
  if (delegate_ && delegate_->HandleContextMenu(params))
    return;

  render_view_host_delegate_view_->ShowContextMenu(render_frame_host, params);
}

WebContents* WebContentsImpl::GetAsWebContents() {
  return this;
}

RenderViewHostDelegateView* WebContentsImpl::GetDelegateView() {
  return render_view_host_delegate_view_;
}

RendererPreferences WebContentsImpl::GetRendererPrefs(
    BrowserContext* browser_context) const {
  return renderer_preferences_;
}

gfx::Rect WebContentsImpl::GetRootWindowResizerRect() const {
  if (delegate_)
    return delegate_->GetRootWindowResizerRect();
  return gfx::Rect();
}

void WebContentsImpl::RemoveBrowserPluginEmbedder() {
  if (browser_plugin_embedder_)
    browser_plugin_embedder_.reset();
}

void WebContentsImpl::RenderViewCreated(RenderViewHost* render_view_host) {
  // Don't send notifications if we are just creating a swapped-out RVH for
  // the opener chain.  These won't be used for view-source or WebUI, so it's
  // ok to return early.
  if (static_cast<RenderViewHostImpl*>(render_view_host)->IsSwappedOut())
    return;

  if (delegate_)
    view_->SetOverscrollControllerEnabled(delegate_->CanOverscrollContent());

  NotificationService::current()->Notify(
      NOTIFICATION_WEB_CONTENTS_RENDER_VIEW_HOST_CREATED,
      Source<WebContents>(this),
      Details<RenderViewHost>(render_view_host));

  // When we're creating views, we're still doing initial setup, so we always
  // use the pending Web UI rather than any possibly existing committed one.
  if (GetRenderManager()->pending_web_ui())
    GetRenderManager()->pending_web_ui()->RenderViewCreated(render_view_host);

  NavigationEntry* entry = controller_.GetPendingEntry();
  if (entry && entry->IsViewSourceMode()) {
    // Put the renderer in view source mode.
    render_view_host->Send(
        new ViewMsg_EnableViewSourceMode(render_view_host->GetRoutingID()));
  }

  view_->RenderViewCreated(render_view_host);

  FOR_EACH_OBSERVER(
      WebContentsObserver, observers_, RenderViewCreated(render_view_host));

  // We tell the observers now instead of when the main RenderFrameHostImpl is
  // constructed because otherwise it would be too early (i.e. IPCs sent to the
  // frame would be dropped because it's not created yet).
  RenderFrameHost* main_frame = render_view_host->GetMainFrame();
  FOR_EACH_OBSERVER(
      WebContentsObserver, observers_, RenderFrameCreated(main_frame));
}

void WebContentsImpl::RenderViewReady(RenderViewHost* rvh) {
  if (rvh != GetRenderViewHost()) {
    // Don't notify the world, since this came from a renderer in the
    // background.
    return;
  }

  notify_disconnection_ = true;
  // TODO(avi): Remove. http://crbug.com/170921
  NotificationService::current()->Notify(
      NOTIFICATION_WEB_CONTENTS_CONNECTED,
      Source<WebContents>(this),
      NotificationService::NoDetails());

  bool was_crashed = IsCrashed();
  SetIsCrashed(base::TERMINATION_STATUS_STILL_RUNNING, 0);

  // Restore the focus to the tab (otherwise the focus will be on the top
  // window).
  if (was_crashed && !FocusLocationBarByDefault() &&
      (!delegate_ || delegate_->ShouldFocusPageAfterCrash())) {
    view_->Focus();
  }

  FOR_EACH_OBSERVER(WebContentsObserver, observers_, RenderViewReady());
}

void WebContentsImpl::RenderViewTerminated(RenderViewHost* rvh,
                                           base::TerminationStatus status,
                                           int error_code) {
  if (rvh != GetRenderViewHost()) {
    // The pending page's RenderViewHost is gone.
    return;
  }

  // Ensure fullscreen mode is exited in the |delegate_| since a crashed
  // renderer may not have made a clean exit.
  if (IsFullscreenForCurrentTab())
    ToggleFullscreenMode(false);

  // Cancel any visible dialogs so they are not left dangling over the sad tab.
  if (dialog_manager_)
    dialog_manager_->CancelActiveAndPendingDialogs(this);

  ClearPowerSaveBlockers(rvh);
  SetIsLoading(rvh, false, true, NULL);
  NotifyDisconnected();
  SetIsCrashed(status, error_code);
  GetView()->OnTabCrashed(GetCrashedStatus(), crashed_error_code_);

  FOR_EACH_OBSERVER(WebContentsObserver,
                    observers_,
                    RenderProcessGone(GetCrashedStatus()));
}

void WebContentsImpl::RenderViewDeleted(RenderViewHost* rvh) {
  ClearPowerSaveBlockers(rvh);
  GetRenderManager()->RenderViewDeleted(rvh);
  FOR_EACH_OBSERVER(WebContentsObserver, observers_, RenderViewDeleted(rvh));
}

void WebContentsImpl::UpdateState(RenderViewHost* rvh,
                                  int32 page_id,
                                  const PageState& page_state) {
  // Ensure that this state update comes from either the active RVH or one of
  // the swapped out RVHs.  We don't expect to hear from any other RVHs.
  // TODO(nasko): This should go through RenderFrameHost.
  // TODO(creis): We can't update state for cross-process subframes until we
  // have FrameNavigationEntries.  Once we do, this should be a DCHECK.
  if (rvh != GetRenderViewHost() &&
      !GetRenderManager()->IsRVHOnSwappedOutList(
          static_cast<RenderViewHostImpl*>(rvh)))
    return;

  // We must be prepared to handle state updates for any page, these occur
  // when the user is scrolling and entering form data, as well as when we're
  // leaving a page, in which case our state may have already been moved to
  // the next page. The navigation controller will look up the appropriate
  // NavigationEntry and update it when it is notified via the delegate.

  int entry_index = controller_.GetEntryIndexWithPageID(
      rvh->GetSiteInstance(), page_id);
  if (entry_index < 0)
    return;
  NavigationEntry* entry = controller_.GetEntryAtIndex(entry_index);

  if (page_state == entry->GetPageState())
    return;  // Nothing to update.
  entry->SetPageState(page_state);
  controller_.NotifyEntryChanged(entry, entry_index);
}

void WebContentsImpl::UpdateTitle(RenderViewHost* rvh,
                                  int32 page_id,
                                  const base::string16& title,
                                  base::i18n::TextDirection title_direction) {
  // If we have a title, that's a pretty good indication that we've started
  // getting useful data.
  SetNotWaitingForResponse();

  // Try to find the navigation entry, which might not be the current one.
  // For example, it might be from a pending RVH for the pending entry.
  NavigationEntryImpl* entry = controller_.GetEntryWithPageID(
      rvh->GetSiteInstance(), page_id);

  // We can handle title updates when we don't have an entry in
  // UpdateTitleForEntry, but only if the update is from the current RVH.
  if (!entry && rvh != GetRenderViewHost())
    return;

  // TODO(evan): make use of title_direction.
  // http://code.google.com/p/chromium/issues/detail?id=27094
  if (!UpdateTitleForEntry(entry, title))
    return;

  // Broadcast notifications when the UI should be updated.
  if (entry == controller_.GetEntryAtOffset(0))
    NotifyNavigationStateChanged(INVALIDATE_TYPE_TITLE);
}

void WebContentsImpl::UpdateEncoding(RenderViewHost* render_view_host,
                                     const std::string& encoding) {
  SetEncoding(encoding);
}

void WebContentsImpl::UpdateTargetURL(int32 page_id, const GURL& url) {
  if (delegate_)
    delegate_->UpdateTargetURL(this, page_id, url);
}

void WebContentsImpl::Close(RenderViewHost* rvh) {
#if defined(OS_MACOSX)
  // The UI may be in an event-tracking loop, such as between the
  // mouse-down and mouse-up in text selection or a button click.
  // Defer the close until after tracking is complete, so that we
  // don't free objects out from under the UI.
  // TODO(shess): This could get more fine-grained.  For instance,
  // closing a tab in another window while selecting text in the
  // current window's Omnibox should be just fine.
  if (view_->IsEventTracking()) {
    view_->CloseTabAfterEventTracking();
    return;
  }
#endif

  // Ignore this if it comes from a RenderViewHost that we aren't showing.
  if (delegate_ && rvh == GetRenderViewHost())
    delegate_->CloseContents(this);
}

void WebContentsImpl::SwappedOut(RenderFrameHost* rfh) {
  if (delegate_ && rfh->GetRenderViewHost() == GetRenderViewHost())
    delegate_->SwappedOut(this);
}

void WebContentsImpl::RequestMove(const gfx::Rect& new_bounds) {
  if (delegate_ && delegate_->IsPopupOrPanel(this))
    delegate_->MoveContents(this, new_bounds);
}

void WebContentsImpl::DidStartLoading(RenderFrameHost* render_frame_host,
                                      bool to_different_document) {
  SetIsLoading(render_frame_host->GetRenderViewHost(), true,
               to_different_document, NULL);
}

void WebContentsImpl::DidStopLoading(RenderFrameHost* render_frame_host) {
  scoped_ptr<LoadNotificationDetails> details;

  // Use the last committed entry rather than the active one, in case a
  // pending entry has been created.
  NavigationEntry* entry = controller_.GetLastCommittedEntry();
  Navigator* navigator = frame_tree_.root()->navigator();

  // An entry may not exist for a stop when loading an initial blank page or
  // if an iframe injected by script into a blank page finishes loading.
  if (entry) {
    base::TimeDelta elapsed =
        base::TimeTicks::Now() - navigator->GetCurrentLoadStart();

    details.reset(new LoadNotificationDetails(
        entry->GetVirtualURL(),
        entry->GetTransitionType(),
        elapsed,
        &controller_,
        controller_.GetCurrentEntryIndex()));
  }

  SetIsLoading(render_frame_host->GetRenderViewHost(), false, true,
               details.get());
}

void WebContentsImpl::DidCancelLoading() {
  controller_.DiscardNonCommittedEntries();

  // Update the URL display.
  NotifyNavigationStateChanged(INVALIDATE_TYPE_URL);
}

void WebContentsImpl::DidChangeLoadProgress(double progress) {
  if (delegate_)
    delegate_->LoadProgressChanged(this, progress);
}

void WebContentsImpl::DidDisownOpener(RenderViewHost* rvh) {
  if (opener_) {
    // Clear our opener so that future cross-process navigations don't have an
    // opener assigned.
    RemoveDestructionObserver(opener_);
    opener_ = NULL;
  }

  // Notify all swapped out RenderViewHosts for this tab.  This is important
  // in case we go back to them, or if another window in those processes tries
  // to access window.opener.
  GetRenderManager()->DidDisownOpener(rvh);
}

void WebContentsImpl::DidAccessInitialDocument() {
  // Update the URL display.
  NotifyNavigationStateChanged(content::INVALIDATE_TYPE_URL);
}

void WebContentsImpl::DocumentAvailableInMainFrame(
    RenderViewHost* render_view_host) {
  FOR_EACH_OBSERVER(WebContentsObserver, observers_,
                    DocumentAvailableInMainFrame());
}

void WebContentsImpl::DocumentOnLoadCompletedInMainFrame(
    RenderViewHost* render_view_host,
    int32 page_id) {
  FOR_EACH_OBSERVER(WebContentsObserver, observers_,
                    DocumentOnLoadCompletedInMainFrame(page_id));

  // TODO(avi): Remove. http://crbug.com/170921
  NotificationService::current()->Notify(
      NOTIFICATION_LOAD_COMPLETED_MAIN_FRAME,
      Source<WebContents>(this),
      Details<int>(&page_id));
}

void WebContentsImpl::RouteCloseEvent(RenderViewHost* rvh) {
  // Tell the active RenderViewHost to run unload handlers and close, as long
  // as the request came from a RenderViewHost in the same BrowsingInstance.
  // In most cases, we receive this from a swapped out RenderViewHost.
  // It is possible to receive it from one that has just been swapped in,
  // in which case we might as well deliver the message anyway.
  if (rvh->GetSiteInstance()->IsRelatedSiteInstance(GetSiteInstance()))
    GetRenderViewHost()->ClosePage();
}

void WebContentsImpl::RouteMessageEvent(
    RenderViewHost* rvh,
    const ViewMsg_PostMessage_Params& params) {
  // Only deliver the message to the active RenderViewHost if the request
  // came from a RenderViewHost in the same BrowsingInstance or if this
  // WebContents is dedicated to a browser plugin guest.
  // Note: This check means that an embedder could theoretically receive a
  // postMessage from anyone (not just its own guests). However, this is
  // probably not a risk for apps since other pages won't have references
  // to App windows.
  if (!rvh->GetSiteInstance()->IsRelatedSiteInstance(GetSiteInstance()) &&
      !GetBrowserPluginGuest() && !GetBrowserPluginEmbedder())
    return;

  ViewMsg_PostMessage_Params new_params(params);

  if (!params.message_port_ids.empty()) {
    MessagePortMessageFilter* message_port_message_filter =
        static_cast<RenderProcessHostImpl*>(GetRenderProcessHost())
            ->message_port_message_filter();
    std::vector<int> new_routing_ids(params.message_port_ids.size());
    for (size_t i = 0; i < params.message_port_ids.size(); ++i) {
      new_routing_ids[i] = message_port_message_filter->GetNextRoutingID();
      MessagePortService::GetInstance()->UpdateMessagePort(
          params.message_port_ids[i],
          message_port_message_filter,
          new_routing_ids[i]);
    }
    new_params.new_routing_ids = new_routing_ids;
  }

  // If there is a source_routing_id, translate it to the routing ID for
  // the equivalent swapped out RVH in the target process.  If we need
  // to create a swapped out RVH for the source tab, we create its opener
  // chain as well, since those will also be accessible to the target page.
  if (new_params.source_routing_id != MSG_ROUTING_NONE) {
    // Try to look up the WebContents for the source page.
    WebContentsImpl* source_contents = NULL;
    RenderViewHostImpl* source_rvh = RenderViewHostImpl::FromID(
        rvh->GetProcess()->GetID(), params.source_routing_id);
    if (source_rvh) {
      source_contents = static_cast<WebContentsImpl*>(
          source_rvh->GetDelegate()->GetAsWebContents());
    }

    if (source_contents) {
      if (GetBrowserPluginGuest()) {
        // We create a swapped out RenderView for the embedder in the guest's
        // render process but we intentionally do not expose the embedder's
        // opener chain to it.
        new_params.source_routing_id =
            source_contents->CreateSwappedOutRenderView(GetSiteInstance());
      } else {
        new_params.source_routing_id =
            source_contents->CreateOpenerRenderViews(GetSiteInstance());
      }
    } else {
      // We couldn't find it, so don't pass a source frame.
      new_params.source_routing_id = MSG_ROUTING_NONE;
    }
  }

  // In most cases, we receive this from a swapped out RenderViewHost.
  // It is possible to receive it from one that has just been swapped in,
  // in which case we might as well deliver the message anyway.
  Send(new ViewMsg_PostMessageEvent(GetRoutingID(), new_params));
}

void WebContentsImpl::RunJavaScriptMessage(
    RenderViewHost* rvh,
    const base::string16& message,
    const base::string16& default_prompt,
    const GURL& frame_url,
    JavaScriptMessageType javascript_message_type,
    IPC::Message* reply_msg,
    bool* did_suppress_message) {
  // Suppress JavaScript dialogs when requested. Also suppress messages when
  // showing an interstitial as it's shown over the previous page and we don't
  // want the hidden page's dialogs to interfere with the interstitial.
  bool suppress_this_message =
      static_cast<RenderViewHostImpl*>(rvh)->IsSwappedOut() ||
      ShowingInterstitialPage() ||
      !delegate_ ||
      delegate_->ShouldSuppressDialogs() ||
      !delegate_->GetJavaScriptDialogManager();

  if (!suppress_this_message) {
    std::string accept_lang = GetContentClient()->browser()->
      GetAcceptLangs(GetBrowserContext());
    dialog_manager_ = delegate_->GetJavaScriptDialogManager();
    dialog_manager_->RunJavaScriptDialog(
        this,
        frame_url.GetOrigin(),
        accept_lang,
        javascript_message_type,
        message,
        default_prompt,
        base::Bind(&WebContentsImpl::OnDialogClosed,
                   base::Unretained(this),
                   rvh,
                   reply_msg),
        &suppress_this_message);
  }

  *did_suppress_message = suppress_this_message;

  if (suppress_this_message) {
    // If we are suppressing messages, just reply as if the user immediately
    // pressed "Cancel".
    OnDialogClosed(rvh, reply_msg, false, base::string16());
  }

  // OnDialogClosed (two lines up) may have caused deletion of this object (see
  // http://crbug.com/288961 ). The only safe thing to do here is return.
}

void WebContentsImpl::RunBeforeUnloadConfirm(RenderViewHost* rvh,
                                             const base::string16& message,
                                             bool is_reload,
                                             IPC::Message* reply_msg) {
  RenderViewHostImpl* rvhi = static_cast<RenderViewHostImpl*>(rvh);
  if (delegate_)
    delegate_->WillRunBeforeUnloadConfirm();

  bool suppress_this_message =
      rvhi->rvh_state() != RenderViewHostImpl::STATE_DEFAULT ||
      !delegate_ ||
      delegate_->ShouldSuppressDialogs() ||
      !delegate_->GetJavaScriptDialogManager();
  if (suppress_this_message) {
    // The reply must be sent to the RVH that sent the request.
    rvhi->JavaScriptDialogClosed(reply_msg, true, base::string16());
    return;
  }

  is_showing_before_unload_dialog_ = true;
  dialog_manager_ = delegate_->GetJavaScriptDialogManager();
  dialog_manager_->RunBeforeUnloadDialog(
      this, message, is_reload,
      base::Bind(&WebContentsImpl::OnDialogClosed, base::Unretained(this), rvh,
                 reply_msg));
}

bool WebContentsImpl::AddMessageToConsole(int32 level,
                                          const base::string16& message,
                                          int32 line_no,
                                          const base::string16& source_id) {
  if (!delegate_)
    return false;
  return delegate_->AddMessageToConsole(this, level, message, line_no,
                                        source_id);
}

WebPreferences WebContentsImpl::GetWebkitPrefs() {
  // We want to base the page config off of the actual URL, rather than the
  // virtual URL.
  // TODO(nasko): Investigate how to remove the GetActiveEntry usage here,
  // as it is deprecated and can be out of sync with GetRenderViewHost().
  GURL url = controller_.GetActiveEntry()
      ? controller_.GetActiveEntry()->GetURL() : GURL::EmptyGURL();

  return GetRenderManager()->current_host()->GetWebkitPrefs(url);
}

int WebContentsImpl::CreateSwappedOutRenderView(
    SiteInstance* instance) {
  return GetRenderManager()->CreateRenderFrame(instance, MSG_ROUTING_NONE,
                                               true, true);
}

void WebContentsImpl::OnUserGesture() {
  // Notify observers.
  FOR_EACH_OBSERVER(WebContentsObserver, observers_, DidGetUserGesture());

  ResourceDispatcherHostImpl* rdh = ResourceDispatcherHostImpl::Get();
  if (rdh)  // NULL in unittests.
    rdh->OnUserGesture(this);
}

void WebContentsImpl::OnIgnoredUIEvent() {
  // Notify observers.
  FOR_EACH_OBSERVER(WebContentsObserver, observers_, DidGetIgnoredUIEvent());
}

void WebContentsImpl::RendererUnresponsive(RenderViewHost* rvh,
                                           bool is_during_beforeunload,
                                           bool is_during_unload) {
  // Don't show hung renderer dialog for a swapped out RVH.
  if (rvh != GetRenderViewHost())
    return;

  RenderViewHostImpl* rvhi = static_cast<RenderViewHostImpl*>(rvh);

  // Ignore renderer unresponsive event if debugger is attached to the tab
  // since the event may be a result of the renderer sitting on a breakpoint.
  // See http://crbug.com/65458
  if (DevToolsAgentHost::IsDebuggerAttached(this))
    return;

  if (is_during_beforeunload || is_during_unload) {
    // Hang occurred while firing the beforeunload/unload handler.
    // Pretend the handler fired so tab closing continues as if it had.
    rvhi->set_sudden_termination_allowed(true);

    if (!GetRenderManager()->ShouldCloseTabOnUnresponsiveRenderer())
      return;

    // If the tab hangs in the beforeunload/unload handler there's really
    // nothing we can do to recover. If the hang is in the beforeunload handler,
    // pretend the beforeunload listeners have all fired and allow the delegate
    // to continue closing; the user will not have the option of cancelling the
    // close. Otherwise, pretend the unload listeners have all fired and close
    // the tab.
    bool close = true;
    if (is_during_beforeunload) {
      delegate_->BeforeUnloadFired(this, true, &close);
    }
    if (close)
      Close(rvh);
    return;
  }

  if (!GetRenderViewHostImpl() || !GetRenderViewHostImpl()->IsRenderViewLive())
    return;

  if (delegate_)
    delegate_->RendererUnresponsive(this);
}

void WebContentsImpl::RendererResponsive(RenderViewHost* render_view_host) {
  if (delegate_)
    delegate_->RendererResponsive(this);
}

void WebContentsImpl::LoadStateChanged(
    const GURL& url,
    const net::LoadStateWithParam& load_state,
    uint64 upload_position,
    uint64 upload_size) {
  load_state_ = load_state;
  upload_position_ = upload_position;
  upload_size_ = upload_size;
  load_state_host_ = net::IDNToUnicode(url.host(),
      GetContentClient()->browser()->GetAcceptLangs(
          GetBrowserContext()));
  if (load_state_.state == net::LOAD_STATE_READING_RESPONSE)
    SetNotWaitingForResponse();
  if (IsLoading()) {
    NotifyNavigationStateChanged(INVALIDATE_TYPE_LOAD | INVALIDATE_TYPE_TAB);
  }
}

void WebContentsImpl::BeforeUnloadFiredFromRenderManager(
    bool proceed, const base::TimeTicks& proceed_time,
    bool* proceed_to_fire_unload) {
  FOR_EACH_OBSERVER(WebContentsObserver, observers_,
                    BeforeUnloadFired(proceed_time));
  if (delegate_)
    delegate_->BeforeUnloadFired(this, proceed, proceed_to_fire_unload);
  // Note: |this| might be deleted at this point.
}

void WebContentsImpl::RenderProcessGoneFromRenderManager(
    RenderViewHost* render_view_host) {
  DCHECK(crashed_status_ != base::TERMINATION_STATUS_STILL_RUNNING);
  RenderViewTerminated(render_view_host, crashed_status_, crashed_error_code_);
}

void WebContentsImpl::UpdateRenderViewSizeForRenderManager() {
  // TODO(brettw) this is a hack. See WebContentsView::SizeContents.
  gfx::Size size = GetSizeForNewRenderView();
  // 0x0 isn't a valid window size (minimal window size is 1x1) but it may be
  // here during container initialization and normal window size will be set
  // later. In case of tab duplication this resizing to 0x0 prevents setting
  // normal size later so just ignore it.
  if (!size.IsEmpty())
    view_->SizeContents(size);
}

void WebContentsImpl::CancelModalDialogsForRenderManager() {
  // We need to cancel modal dialogs when doing a process swap, since the load
  // deferrer would prevent us from swapping out.
  if (dialog_manager_)
    dialog_manager_->CancelActiveAndPendingDialogs(this);
}

void WebContentsImpl::NotifySwappedFromRenderManager(RenderViewHost* old_host,
                                                     RenderViewHost* new_host) {
  NotifySwapped(old_host, new_host);

  // Make sure the visible RVH reflects the new delegate's preferences.
  if (delegate_)
    view_->SetOverscrollControllerEnabled(delegate_->CanOverscrollContent());

  view_->RenderViewSwappedIn(new_host);
}

int WebContentsImpl::CreateOpenerRenderViewsForRenderManager(
    SiteInstance* instance) {
  if (!opener_)
    return MSG_ROUTING_NONE;

  // Recursively create RenderViews for anything else in the opener chain.
  return opener_->CreateOpenerRenderViews(instance);
}

int WebContentsImpl::CreateOpenerRenderViews(SiteInstance* instance) {
  int opener_route_id = MSG_ROUTING_NONE;

  // If this tab has an opener, ensure it has a RenderView in the given
  // SiteInstance as well.
  if (opener_)
    opener_route_id = opener_->CreateOpenerRenderViews(instance);

  // If any of the renderers (current, pending, or swapped out) for this
  // WebContents has the same SiteInstance, use it.
  if (GetRenderManager()->current_host()->GetSiteInstance() == instance)
    return GetRenderManager()->current_host()->GetRoutingID();

  if (GetRenderManager()->pending_render_view_host() &&
      GetRenderManager()->pending_render_view_host()->GetSiteInstance() ==
          instance)
    return GetRenderManager()->pending_render_view_host()->GetRoutingID();

  RenderViewHostImpl* rvh = GetRenderManager()->GetSwappedOutRenderViewHost(
      instance);
  if (rvh)
    return rvh->GetRoutingID();

  // Create a swapped out RenderView in the given SiteInstance if none exists,
  // setting its opener to the given route_id.  Return the new view's route_id.
  return GetRenderManager()->CreateRenderFrame(instance, opener_route_id,
                                               true, true);
}

NavigationControllerImpl& WebContentsImpl::GetControllerForRenderManager() {
  return GetController();
}

WebUIImpl* WebContentsImpl::CreateWebUIForRenderManager(const GURL& url) {
  return static_cast<WebUIImpl*>(CreateWebUI(url));
}

NavigationEntry*
    WebContentsImpl::GetLastCommittedNavigationEntryForRenderManager() {
  return controller_.GetLastCommittedEntry();
}

bool WebContentsImpl::CreateRenderViewForRenderManager(
    RenderViewHost* render_view_host,
    int opener_route_id,
    CrossProcessFrameConnector* frame_connector) {
  TRACE_EVENT0("browser", "WebContentsImpl::CreateRenderViewForRenderManager");
  // Can be NULL during tests.
  RenderWidgetHostView* rwh_view;
  // TODO(kenrb): RenderWidgetHostViewChildFrame special casing is temporary
  // until RenderWidgetHost is attached to RenderFrameHost. We need to special
  // case this because RWH is still a base class of RenderViewHost, and child
  // frame RWHVs are unique in that they do not have their own WebContents.
  if (frame_connector) {
    RenderWidgetHostViewChildFrame* rwh_view_child =
        new RenderWidgetHostViewChildFrame(render_view_host);
    frame_connector->set_view(rwh_view_child);
    rwh_view = rwh_view_child;
  } else {
    rwh_view = view_->CreateViewForWidget(render_view_host);
  }

  // Now that the RenderView has been created, we need to tell it its size.
  if (rwh_view)
    rwh_view->SetSize(GetSizeForNewRenderView());

  // Make sure we use the correct starting page_id in the new RenderView.
  UpdateMaxPageIDIfNecessary(render_view_host);
  int32 max_page_id =
      GetMaxPageIDForSiteInstance(render_view_host->GetSiteInstance());

  if (!static_cast<RenderViewHostImpl*>(
          render_view_host)->CreateRenderView(base::string16(),
                                              opener_route_id,
                                              max_page_id)) {
    return false;
  }

#if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
  // Force a ViewMsg_Resize to be sent, needed to make plugins show up on
  // linux. See crbug.com/83941.
  if (rwh_view) {
    if (RenderWidgetHost* render_widget_host = rwh_view->GetRenderWidgetHost())
      render_widget_host->WasResized();
  }
#endif

  return true;
}

#if defined(OS_ANDROID)
base::android::ScopedJavaLocalRef<jobject>
WebContentsImpl::GetJavaWebContents() {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));

  WebContentsAndroid* web_contents_android =
      static_cast<WebContentsAndroid*>(GetUserData(kWebContentsAndroidKey));
  if (!web_contents_android) {
    web_contents_android = new WebContentsAndroid(this);
    SetUserData(kWebContentsAndroidKey, web_contents_android);
  }
  return web_contents_android->GetJavaObject();
}

bool WebContentsImpl::CreateRenderViewForInitialEmptyDocument() {
  return CreateRenderViewForRenderManager(GetRenderViewHost(),
                                          MSG_ROUTING_NONE,
                                          NULL);
}
#endif

void WebContentsImpl::OnDialogClosed(RenderViewHost* rvh,
                                     IPC::Message* reply_msg,
                                     bool success,
                                     const base::string16& user_input) {
  if (is_showing_before_unload_dialog_ && !success) {
    // If a beforeunload dialog is canceled, we need to stop the throbber from
    // spinning, since we forced it to start spinning in Navigate.
    DidStopLoading(rvh->GetMainFrame());
    controller_.DiscardNonCommittedEntries();

    FOR_EACH_OBSERVER(WebContentsObserver, observers_,
                      BeforeUnloadDialogCancelled());
  }
  is_showing_before_unload_dialog_ = false;
  static_cast<RenderViewHostImpl*>(
      rvh)->JavaScriptDialogClosed(reply_msg, success, user_input);
}

void WebContentsImpl::SetEncoding(const std::string& encoding) {
  encoding_ = GetContentClient()->browser()->
      GetCanonicalEncodingNameByAliasName(encoding);
}

void WebContentsImpl::CreateViewAndSetSizeForRVH(RenderViewHost* rvh) {
  RenderWidgetHostView* rwh_view = view_->CreateViewForWidget(rvh);
  // Can be NULL during tests.
  if (rwh_view)
    rwh_view->SetSize(GetView()->GetContainerSize());
}

bool WebContentsImpl::IsHidden() {
  return capturer_count_ == 0 && !should_normally_be_visible_;
}

RenderFrameHostManager* WebContentsImpl::GetRenderManager() const {
  return frame_tree_.root()->render_manager();
}

RenderViewHostImpl* WebContentsImpl::GetRenderViewHostImpl() {
  return static_cast<RenderViewHostImpl*>(GetRenderViewHost());
}

BrowserPluginGuest* WebContentsImpl::GetBrowserPluginGuest() const {
  return browser_plugin_guest_.get();
}

void WebContentsImpl::SetBrowserPluginGuest(BrowserPluginGuest* guest) {
  CHECK(!browser_plugin_guest_);
  browser_plugin_guest_.reset(guest);
}

BrowserPluginEmbedder* WebContentsImpl::GetBrowserPluginEmbedder() const {
  return browser_plugin_embedder_.get();
}

BrowserPluginGuestManager*
    WebContentsImpl::GetBrowserPluginGuestManager() const {
  return static_cast<BrowserPluginGuestManager*>(
      GetBrowserContext()->GetUserData(
          browser_plugin::kBrowserPluginGuestManagerKeyName));
}

void WebContentsImpl::ClearPowerSaveBlockers(
    RenderViewHost* render_view_host) {
  STLDeleteValues(&power_save_blockers_[render_view_host]);
  power_save_blockers_.erase(render_view_host);
}

void WebContentsImpl::ClearAllPowerSaveBlockers() {
  for (PowerSaveBlockerMap::iterator i(power_save_blockers_.begin());
       i != power_save_blockers_.end(); ++i)
    STLDeleteValues(&power_save_blockers_[i->first]);
  power_save_blockers_.clear();
}

gfx::Size WebContentsImpl::GetSizeForNewRenderView() const {
  gfx::Size size;
  if (delegate_)
    size = delegate_->GetSizeForNewRenderView(this);
  if (size.IsEmpty())
    size = view_->GetContainerSize();
  return size;
}

void WebContentsImpl::OnFrameRemoved(
    RenderViewHostImpl* render_view_host,
    int frame_routing_id) {
   FOR_EACH_OBSERVER(WebContentsObserver, observers_,
                     FrameDetached(render_view_host, frame_routing_id));
}

void WebContentsImpl::OnPreferredSizeChanged(const gfx::Size& old_size) {
  if (!delegate_)
    return;
  const gfx::Size new_size = GetPreferredSize();
  if (new_size != old_size)
    delegate_->UpdatePreferredSize(this, new_size);
}

}  // namespace content