root/ppapi/proxy/ppb_instance_proxy.cc

DEFINITIONS

1. RequestSurroundingText
2. callback_factory_
3. OnMessageReceived
4. BindGraphics
5. IsFullFrame
6. GetViewData
7. FlashIsFullscreen
8. GetWindowObject
9. GetOwnerElementObject
10. ExecuteScript
11. GetAudioHardwareOutputSampleRate
12. GetAudioHardwareOutputBufferSize
13. GetDefaultCharSet
14. SetPluginToHandleFindRequests
15. NumberOfFindResultsChanged
16. SelectedFindResultChanged
17. SetTickmarks
18. IsFullscreen
19. SetFullscreen
20. GetScreenSize
21. GetSingletonResource
22. RequestInputEvents
23. RequestFilteringInputEvents
24. ClearInputEventRequest
25. ZoomChanged
26. ZoomLimitsChanged
27. GetDocumentURL
28. ResolveRelativeToDocument
29. DocumentCanRequest
30. DocumentCanAccessDocument
31. GetPluginInstanceURL
32. GetPluginReferrerURL
33. SessionCreated
34. SessionMessage
35. SessionReady
36. SessionClosed
37. SessionError
38. DeliverBlock
39. DecoderInitializeDone
40. DecoderDeinitializeDone
41. DecoderResetDone
42. DeliverFrame
43. DeliverSamples
44. PostMessage
45. SetCursor
46. LockMouse
47. UnlockMouse
48. SetTextInputType
49. UpdateCaretPosition
50. CancelCompositionText
51. SelectionChanged
52. UpdateSurroundingText
53. OnHostMsgGetWindowObject
54. OnHostMsgGetOwnerElementObject
55. OnHostMsgBindGraphics
56. OnHostMsgGetAudioHardwareOutputSampleRate
57. OnHostMsgGetAudioHardwareOutputBufferSize
58. OnHostMsgIsFullFrame
59. OnHostMsgExecuteScript
60. OnHostMsgGetDefaultCharSet
61. OnHostMsgSetPluginToHandleFindRequests
62. OnHostMsgNumberOfFindResultsChanged
63. OnHostMsgSelectFindResultChanged
64. OnHostMsgSetTickmarks
65. OnHostMsgSetFullscreen
66. OnHostMsgGetScreenSize
67. OnHostMsgRequestInputEvents
68. OnHostMsgClearInputEvents
69. OnHostMsgPostMessage
70. OnHostMsgLockMouse
71. OnHostMsgUnlockMouse
72. OnHostMsgGetDocumentURL
73. OnHostMsgResolveRelativeToDocument
74. OnHostMsgDocumentCanRequest
75. OnHostMsgDocumentCanAccessDocument
76. OnHostMsgGetPluginInstanceURL
77. OnHostMsgGetPluginReferrerURL
78. OnHostMsgSessionCreated
79. OnHostMsgSessionMessage
80. OnHostMsgSessionReady
81. OnHostMsgSessionClosed
82. OnHostMsgSessionError
83. OnHostMsgDeliverBlock
84. OnHostMsgDecoderInitializeDone
85. OnHostMsgDecoderDeinitializeDone
86. OnHostMsgDecoderResetDone
87. OnHostMsgDeliverFrame
88. OnHostMsgDeliverSamples
89. OnHostMsgSetCursor
90. OnHostMsgSetTextInputType
91. OnHostMsgUpdateCaretPosition
92. OnHostMsgCancelCompositionText
93. OnHostMsgUpdateSurroundingText
94. OnPluginMsgMouseLockComplete
95. MouseLockCompleteInHost
96. CancelAnyPendingRequestSurroundingText

// 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 "ppapi/proxy/ppb_instance_proxy.h"

#include "base/memory/ref_counted.h"
#include "build/build_config.h"
#include "ppapi/c/pp_errors.h"
#include "ppapi/c/pp_time.h"
#include "ppapi/c/pp_var.h"
#include "ppapi/c/ppb_audio_config.h"
#include "ppapi/c/ppb_instance.h"
#include "ppapi/c/ppb_messaging.h"
#include "ppapi/c/ppb_mouse_lock.h"
#include "ppapi/c/private/pp_content_decryptor.h"
#include "ppapi/proxy/broker_resource.h"
#include "ppapi/proxy/browser_font_singleton_resource.h"
#include "ppapi/proxy/content_decryptor_private_serializer.h"
#include "ppapi/proxy/enter_proxy.h"
#include "ppapi/proxy/extensions_common_resource.h"
#include "ppapi/proxy/file_mapping_resource.h"
#include "ppapi/proxy/flash_clipboard_resource.h"
#include "ppapi/proxy/flash_file_resource.h"
#include "ppapi/proxy/flash_fullscreen_resource.h"
#include "ppapi/proxy/flash_resource.h"
#include "ppapi/proxy/gamepad_resource.h"
#include "ppapi/proxy/host_dispatcher.h"
#include "ppapi/proxy/isolated_file_system_private_resource.h"
#include "ppapi/proxy/network_proxy_resource.h"
#include "ppapi/proxy/pdf_resource.h"
#include "ppapi/proxy/plugin_dispatcher.h"
#include "ppapi/proxy/ppapi_messages.h"
#include "ppapi/proxy/serialized_var.h"
#include "ppapi/proxy/truetype_font_singleton_resource.h"
#include "ppapi/proxy/uma_private_resource.h"
#include "ppapi/shared_impl/ppapi_globals.h"
#include "ppapi/shared_impl/ppb_url_util_shared.h"
#include "ppapi/shared_impl/ppb_view_shared.h"
#include "ppapi/shared_impl/var.h"
#include "ppapi/thunk/enter.h"
#include "ppapi/thunk/ppb_graphics_2d_api.h"
#include "ppapi/thunk/ppb_graphics_3d_api.h"
#include "ppapi/thunk/thunk.h"

// Windows headers interfere with this file.
#ifdef PostMessage
#undef PostMessage
#endif

using ppapi::thunk::EnterInstanceNoLock;
using ppapi::thunk::EnterResourceNoLock;
using ppapi::thunk::PPB_Graphics2D_API;
using ppapi::thunk::PPB_Graphics3D_API;
using ppapi::thunk::PPB_Instance_API;

namespace ppapi {
namespace proxy {

namespace {

#if !defined(OS_NACL)
const char kSerializationError[] = "Failed to convert a PostMessage "
    "argument from a PP_Var to a Javascript value. It may have cycles or be of "
    "an unsupported type.";
#endif

void RequestSurroundingText(PP_Instance instance) {
  PluginDispatcher* dispatcher = PluginDispatcher::GetForInstance(instance);
  if (!dispatcher)
    return;  // Instance has gone away while message was pending.

  InstanceData* data = dispatcher->GetInstanceData(instance);
  DCHECK(data);  // Should have it, since we still have a dispatcher.
  data->is_request_surrounding_text_pending = false;
  if (!data->should_do_request_surrounding_text)
    return;

  // Just fake out a RequestSurroundingText message to the proxy for the PPP
  // interface.
  InterfaceProxy* proxy = dispatcher->GetInterfaceProxy(API_ID_PPP_TEXT_INPUT);
  if (!proxy)
    return;
  proxy->OnMessageReceived(PpapiMsg_PPPTextInput_RequestSurroundingText(
      API_ID_PPP_TEXT_INPUT, instance,
      PPB_Instance_Shared::kExtraCharsForTextInput));
}

}  // namespace

PPB_Instance_Proxy::PPB_Instance_Proxy(Dispatcher* dispatcher)
    : InterfaceProxy(dispatcher),
      callback_factory_(this) {
}

PPB_Instance_Proxy::~PPB_Instance_Proxy() {
}

bool PPB_Instance_Proxy::OnMessageReceived(const IPC::Message& msg) {
  // Prevent the dispatcher from going away during a call to ExecuteScript.
  // This must happen OUTSIDE of ExecuteScript since the SerializedVars use
  // the dispatcher upon return of the function (converting the
  // SerializedVarReturnValue/OutParam to a SerializedVar in the destructor).
#if !defined(OS_NACL)
  ScopedModuleReference death_grip(dispatcher());
#endif

  bool handled = true;
  IPC_BEGIN_MESSAGE_MAP(PPB_Instance_Proxy, msg)
#if !defined(OS_NACL)
    // Plugin -> Host messages.
    IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_GetWindowObject,
                        OnHostMsgGetWindowObject)
    IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_GetOwnerElementObject,
                        OnHostMsgGetOwnerElementObject)
    IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_BindGraphics,
                        OnHostMsgBindGraphics)
    IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_IsFullFrame,
                        OnHostMsgIsFullFrame)
    IPC_MESSAGE_HANDLER(
        PpapiHostMsg_PPBInstance_GetAudioHardwareOutputSampleRate,
        OnHostMsgGetAudioHardwareOutputSampleRate)
    IPC_MESSAGE_HANDLER(
        PpapiHostMsg_PPBInstance_GetAudioHardwareOutputBufferSize,
        OnHostMsgGetAudioHardwareOutputBufferSize)
    IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_ExecuteScript,
                        OnHostMsgExecuteScript)
    IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_GetDefaultCharSet,
                        OnHostMsgGetDefaultCharSet)
    IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_SetPluginToHandleFindRequests,
                        OnHostMsgSetPluginToHandleFindRequests);
    IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_NumberOfFindResultsChanged,
                        OnHostMsgNumberOfFindResultsChanged)
    IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_SelectFindResultChanged,
                        OnHostMsgSelectFindResultChanged)
    IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_SetTickmarks,
                        OnHostMsgSetTickmarks)
    IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_PostMessage,
                        OnHostMsgPostMessage)
    IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_SetFullscreen,
                        OnHostMsgSetFullscreen)
    IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_GetScreenSize,
                        OnHostMsgGetScreenSize)
    IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_RequestInputEvents,
                        OnHostMsgRequestInputEvents)
    IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_ClearInputEvents,
                        OnHostMsgClearInputEvents)
    IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_LockMouse,
                        OnHostMsgLockMouse)
    IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_UnlockMouse,
                        OnHostMsgUnlockMouse)
    IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_SetCursor,
                        OnHostMsgSetCursor)
    IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_SetTextInputType,
                        OnHostMsgSetTextInputType)
    IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_UpdateCaretPosition,
                        OnHostMsgUpdateCaretPosition)
    IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_CancelCompositionText,
                        OnHostMsgCancelCompositionText)
    IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_UpdateSurroundingText,
                        OnHostMsgUpdateSurroundingText)
    IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_GetDocumentURL,
                        OnHostMsgGetDocumentURL)
    IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_ResolveRelativeToDocument,
                        OnHostMsgResolveRelativeToDocument)
    IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_DocumentCanRequest,
                        OnHostMsgDocumentCanRequest)
    IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_DocumentCanAccessDocument,
                        OnHostMsgDocumentCanAccessDocument)
    IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_GetPluginInstanceURL,
                        OnHostMsgGetPluginInstanceURL)
    IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_GetPluginReferrerURL,
                        OnHostMsgGetPluginReferrerURL)
    IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_SessionCreated,
                        OnHostMsgSessionCreated)
    IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_SessionMessage,
                        OnHostMsgSessionMessage)
    IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_SessionReady,
                        OnHostMsgSessionReady)
    IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_SessionClosed,
                        OnHostMsgSessionClosed)
    IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_SessionError,
                        OnHostMsgSessionError)
    IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_DeliverBlock,
                        OnHostMsgDeliverBlock)
    IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_DecoderInitializeDone,
                        OnHostMsgDecoderInitializeDone)
    IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_DecoderDeinitializeDone,
                        OnHostMsgDecoderDeinitializeDone)
    IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_DecoderResetDone,
                        OnHostMsgDecoderResetDone)
    IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_DeliverFrame,
                        OnHostMsgDeliverFrame)
    IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBInstance_DeliverSamples,
                        OnHostMsgDeliverSamples)
#endif  // !defined(OS_NACL)

    // Host -> Plugin messages.
    IPC_MESSAGE_HANDLER(PpapiMsg_PPBInstance_MouseLockComplete,
                        OnPluginMsgMouseLockComplete)

    IPC_MESSAGE_UNHANDLED(handled = false)
  IPC_END_MESSAGE_MAP()
  return handled;
}

PP_Bool PPB_Instance_Proxy::BindGraphics(PP_Instance instance,
                                         PP_Resource device) {
  // If device is 0, pass a null HostResource. This signals the host to unbind
  // all devices.
  HostResource host_resource;
  PP_Resource pp_resource = 0;
  if (device) {
    Resource* resource =
        PpapiGlobals::Get()->GetResourceTracker()->GetResource(device);
    if (!resource || resource->pp_instance() != instance)
      return PP_FALSE;
    host_resource = resource->host_resource();
    pp_resource = resource->pp_resource();
  } else {
    // Passing 0 means unbinding all devices.
    dispatcher()->Send(new PpapiHostMsg_PPBInstance_BindGraphics(
        API_ID_PPB_INSTANCE, instance, 0));
    return PP_TRUE;
  }

  // We need to pass different resource to Graphics 2D and 3D right now.  Once
  // 3D is migrated to the new design, we should be able to unify this.
  EnterResourceNoLock<PPB_Graphics2D_API> enter_2d(device, false);
  EnterResourceNoLock<PPB_Graphics3D_API> enter_3d(device, false);
  if (enter_2d.succeeded()) {
    dispatcher()->Send(new PpapiHostMsg_PPBInstance_BindGraphics(
        API_ID_PPB_INSTANCE, instance, pp_resource));
    return PP_TRUE;
  } else if (enter_3d.succeeded()) {
    dispatcher()->Send(new PpapiHostMsg_PPBInstance_BindGraphics(
        API_ID_PPB_INSTANCE, instance, host_resource.host_resource()));
    return PP_TRUE;
  }
  return PP_FALSE;
}

PP_Bool PPB_Instance_Proxy::IsFullFrame(PP_Instance instance) {
  PP_Bool result = PP_FALSE;
  dispatcher()->Send(new PpapiHostMsg_PPBInstance_IsFullFrame(
      API_ID_PPB_INSTANCE, instance, &result));
  return result;
}

const ViewData* PPB_Instance_Proxy::GetViewData(PP_Instance instance) {
  InstanceData* data = static_cast<PluginDispatcher*>(dispatcher())->
      GetInstanceData(instance);
  if (!data)
    return NULL;
  return &data->view;
}

PP_Bool PPB_Instance_Proxy::FlashIsFullscreen(PP_Instance instance) {
  // This function is only used for proxying in the renderer process. It is not
  // implemented in the plugin process.
  NOTREACHED();
  return PP_FALSE;
}

PP_Var PPB_Instance_Proxy::GetWindowObject(PP_Instance instance) {
  ReceiveSerializedVarReturnValue result;
  dispatcher()->Send(new PpapiHostMsg_PPBInstance_GetWindowObject(
      API_ID_PPB_INSTANCE, instance, &result));
  return result.Return(dispatcher());
}

PP_Var PPB_Instance_Proxy::GetOwnerElementObject(PP_Instance instance) {
  ReceiveSerializedVarReturnValue result;
  dispatcher()->Send(new PpapiHostMsg_PPBInstance_GetOwnerElementObject(
      API_ID_PPB_INSTANCE, instance, &result));
  return result.Return(dispatcher());
}

PP_Var PPB_Instance_Proxy::ExecuteScript(PP_Instance instance,
                                         PP_Var script,
                                         PP_Var* exception) {
  ReceiveSerializedException se(dispatcher(), exception);
  if (se.IsThrown())
    return PP_MakeUndefined();

  ReceiveSerializedVarReturnValue result;
  dispatcher()->Send(new PpapiHostMsg_PPBInstance_ExecuteScript(
      API_ID_PPB_INSTANCE, instance,
      SerializedVarSendInput(dispatcher(), script), &se, &result));
  return result.Return(dispatcher());
}

uint32_t PPB_Instance_Proxy::GetAudioHardwareOutputSampleRate(
    PP_Instance instance) {
  uint32_t result = PP_AUDIOSAMPLERATE_NONE;
  dispatcher()->Send(
      new PpapiHostMsg_PPBInstance_GetAudioHardwareOutputSampleRate(
          API_ID_PPB_INSTANCE, instance, &result));
  return result;
}

uint32_t PPB_Instance_Proxy::GetAudioHardwareOutputBufferSize(
    PP_Instance instance) {
  uint32_t result = 0;
  dispatcher()->Send(
      new PpapiHostMsg_PPBInstance_GetAudioHardwareOutputBufferSize(
          API_ID_PPB_INSTANCE, instance, &result));
  return result;
}

PP_Var PPB_Instance_Proxy::GetDefaultCharSet(PP_Instance instance) {
  PluginDispatcher* dispatcher = PluginDispatcher::GetForInstance(instance);
  if (!dispatcher)
    return PP_MakeUndefined();

  ReceiveSerializedVarReturnValue result;
  dispatcher->Send(new PpapiHostMsg_PPBInstance_GetDefaultCharSet(
      API_ID_PPB_INSTANCE, instance, &result));
  return result.Return(dispatcher);
}

void PPB_Instance_Proxy::SetPluginToHandleFindRequests(PP_Instance instance) {
  dispatcher()->Send(new PpapiHostMsg_PPBInstance_SetPluginToHandleFindRequests(
      API_ID_PPB_INSTANCE, instance));
}

void PPB_Instance_Proxy::NumberOfFindResultsChanged(PP_Instance instance,
                                                    int32_t total,
                                                    PP_Bool final_result) {
  dispatcher()->Send(new PpapiHostMsg_PPBInstance_NumberOfFindResultsChanged(
      API_ID_PPB_INSTANCE, instance, total, final_result));
}

void PPB_Instance_Proxy::SelectedFindResultChanged(PP_Instance instance,
                                                   int32_t index) {
  dispatcher()->Send(new PpapiHostMsg_PPBInstance_SelectFindResultChanged(
      API_ID_PPB_INSTANCE, instance, index));
}

void PPB_Instance_Proxy::SetTickmarks(PP_Instance instance,
                                      const PP_Rect* tickmarks,
                                      uint32_t count) {
  dispatcher()->Send(new PpapiHostMsg_PPBInstance_SetTickmarks(
      API_ID_PPB_INSTANCE, instance,
      std::vector<PP_Rect>(tickmarks, tickmarks + count)));
}

PP_Bool PPB_Instance_Proxy::IsFullscreen(PP_Instance instance) {
  InstanceData* data = static_cast<PluginDispatcher*>(dispatcher())->
      GetInstanceData(instance);
  if (!data)
    return PP_FALSE;
  return PP_FromBool(data->view.is_fullscreen);
}

PP_Bool PPB_Instance_Proxy::SetFullscreen(PP_Instance instance,
                                          PP_Bool fullscreen) {
  PP_Bool result = PP_FALSE;
  dispatcher()->Send(new PpapiHostMsg_PPBInstance_SetFullscreen(
      API_ID_PPB_INSTANCE, instance, fullscreen, &result));
  return result;
}

PP_Bool PPB_Instance_Proxy::GetScreenSize(PP_Instance instance,
                                          PP_Size* size) {
  PP_Bool result = PP_FALSE;
  dispatcher()->Send(new PpapiHostMsg_PPBInstance_GetScreenSize(
      API_ID_PPB_INSTANCE, instance, &result, size));
  return result;
}

Resource* PPB_Instance_Proxy::GetSingletonResource(PP_Instance instance,
                                                   SingletonResourceID id) {
  InstanceData* data = static_cast<PluginDispatcher*>(dispatcher())->
      GetInstanceData(instance);

  InstanceData::SingletonResourceMap::iterator it =
      data->singleton_resources.find(id);
  if (it != data->singleton_resources.end())
    return it->second.get();

  scoped_refptr<Resource> new_singleton;
  Connection connection(PluginGlobals::Get()->GetBrowserSender(), dispatcher());

  switch (id) {
    case BROKER_SINGLETON_ID:
      new_singleton = new BrokerResource(connection, instance);
      break;
    case EXTENSIONS_COMMON_SINGLETON_ID:
      new_singleton = new ExtensionsCommonResource(connection, instance);
      break;
    case FILE_MAPPING_SINGLETON_ID:
      new_singleton = new FileMappingResource(connection, instance);
      break;
    case GAMEPAD_SINGLETON_ID:
      new_singleton = new GamepadResource(connection, instance);
      break;
    case ISOLATED_FILESYSTEM_SINGLETON_ID:
      new_singleton =
          new IsolatedFileSystemPrivateResource(connection, instance);
      break;
    case NETWORK_PROXY_SINGLETON_ID:
      new_singleton = new NetworkProxyResource(connection, instance);
      break;
    case TRUETYPE_FONT_SINGLETON_ID:
      new_singleton = new TrueTypeFontSingletonResource(connection, instance);
      break;
    case UMA_SINGLETON_ID:
      new_singleton = new UMAPrivateResource(connection, instance);
      break;
// Flash/trusted resources aren't needed for NaCl.
#if !defined(OS_NACL) && !defined(NACL_WIN64)
    case BROWSER_FONT_SINGLETON_ID:
      new_singleton = new BrowserFontSingletonResource(connection, instance);
      break;
    case FLASH_CLIPBOARD_SINGLETON_ID:
      new_singleton = new FlashClipboardResource(connection, instance);
      break;
    case FLASH_FILE_SINGLETON_ID:
      new_singleton = new FlashFileResource(connection, instance);
      break;
    case FLASH_FULLSCREEN_SINGLETON_ID:
      new_singleton = new FlashFullscreenResource(connection, instance);
      break;
    case FLASH_SINGLETON_ID:
      new_singleton = new FlashResource(connection, instance,
          static_cast<PluginDispatcher*>(dispatcher()));
      break;
    case PDF_SINGLETON_ID:
      new_singleton = new PDFResource(connection, instance);
      break;
#else
    case BROWSER_FONT_SINGLETON_ID:
    case FLASH_CLIPBOARD_SINGLETON_ID:
    case FLASH_FILE_SINGLETON_ID:
    case FLASH_FULLSCREEN_SINGLETON_ID:
    case FLASH_SINGLETON_ID:
    case PDF_SINGLETON_ID:
      NOTREACHED();
      break;
#endif  // !defined(OS_NACL) && !defined(NACL_WIN64)
  }

  if (!new_singleton.get()) {
    // Getting here implies that a constructor is missing in the above switch.
    NOTREACHED();
    return NULL;
  }

  data->singleton_resources[id] = new_singleton;
  return new_singleton.get();
}

int32_t PPB_Instance_Proxy::RequestInputEvents(PP_Instance instance,
                                               uint32_t event_classes) {
  dispatcher()->Send(new PpapiHostMsg_PPBInstance_RequestInputEvents(
      API_ID_PPB_INSTANCE, instance, false, event_classes));

  // We always register for the classes we can handle, this function validates
  // the flags so we can notify it if anything was invalid, without requiring
  // a sync reply.
  return ValidateRequestInputEvents(false, event_classes);
}

int32_t PPB_Instance_Proxy::RequestFilteringInputEvents(
    PP_Instance instance,
    uint32_t event_classes) {
  dispatcher()->Send(new PpapiHostMsg_PPBInstance_RequestInputEvents(
      API_ID_PPB_INSTANCE, instance, true, event_classes));

  // We always register for the classes we can handle, this function validates
  // the flags so we can notify it if anything was invalid, without requiring
  // a sync reply.
  return ValidateRequestInputEvents(true, event_classes);
}

void PPB_Instance_Proxy::ClearInputEventRequest(PP_Instance instance,
                                                uint32_t event_classes) {
  dispatcher()->Send(new PpapiHostMsg_PPBInstance_ClearInputEvents(
      API_ID_PPB_INSTANCE, instance, event_classes));
}

void PPB_Instance_Proxy::ZoomChanged(PP_Instance instance,
                                     double factor) {
  // Not proxied yet.
  NOTIMPLEMENTED();
}

void PPB_Instance_Proxy::ZoomLimitsChanged(PP_Instance instance,
                                           double minimum_factor,
                                           double maximium_factor) {
  // Not proxied yet.
  NOTIMPLEMENTED();
}

PP_Var PPB_Instance_Proxy::GetDocumentURL(PP_Instance instance,
                                          PP_URLComponents_Dev* components) {
  ReceiveSerializedVarReturnValue result;
  PP_URLComponents_Dev url_components;
  dispatcher()->Send(new PpapiHostMsg_PPBInstance_GetDocumentURL(
      API_ID_PPB_INSTANCE, instance, &url_components, &result));
  if (components)
    *components = url_components;
  return result.Return(dispatcher());
}

#if !defined(OS_NACL)
PP_Var PPB_Instance_Proxy::ResolveRelativeToDocument(
    PP_Instance instance,
    PP_Var relative,
    PP_URLComponents_Dev* components) {
  ReceiveSerializedVarReturnValue result;
  dispatcher()->Send(new PpapiHostMsg_PPBInstance_ResolveRelativeToDocument(
      API_ID_PPB_INSTANCE, instance,
      SerializedVarSendInput(dispatcher(), relative),
      &result));
  return PPB_URLUtil_Shared::ConvertComponentsAndReturnURL(
      result.Return(dispatcher()),
      components);
}

PP_Bool PPB_Instance_Proxy::DocumentCanRequest(PP_Instance instance,
                                               PP_Var url) {
  PP_Bool result = PP_FALSE;
  dispatcher()->Send(new PpapiHostMsg_PPBInstance_DocumentCanRequest(
      API_ID_PPB_INSTANCE, instance,
      SerializedVarSendInput(dispatcher(), url),
      &result));
  return result;
}

PP_Bool PPB_Instance_Proxy::DocumentCanAccessDocument(PP_Instance instance,
                                                      PP_Instance target) {
  PP_Bool result = PP_FALSE;
  dispatcher()->Send(new PpapiHostMsg_PPBInstance_DocumentCanAccessDocument(
      API_ID_PPB_INSTANCE, instance, target, &result));
  return result;
}

PP_Var PPB_Instance_Proxy::GetPluginInstanceURL(
      PP_Instance instance,
      PP_URLComponents_Dev* components) {
  ReceiveSerializedVarReturnValue result;
  dispatcher()->Send(new PpapiHostMsg_PPBInstance_GetPluginInstanceURL(
      API_ID_PPB_INSTANCE, instance, &result));
  return PPB_URLUtil_Shared::ConvertComponentsAndReturnURL(
      result.Return(dispatcher()),
      components);
}

PP_Var PPB_Instance_Proxy::GetPluginReferrerURL(
      PP_Instance instance,
      PP_URLComponents_Dev* components) {
  ReceiveSerializedVarReturnValue result;
  dispatcher()->Send(new PpapiHostMsg_PPBInstance_GetPluginReferrerURL(
      API_ID_PPB_INSTANCE, instance, &result));
  return PPB_URLUtil_Shared::ConvertComponentsAndReturnURL(
      result.Return(dispatcher()),
      components);
}

void PPB_Instance_Proxy::SessionCreated(PP_Instance instance,
                                        uint32_t session_id,
                                        PP_Var web_session_id) {
  dispatcher()->Send(new PpapiHostMsg_PPBInstance_SessionCreated(
      API_ID_PPB_INSTANCE,
      instance,
      session_id,
      SerializedVarSendInput(dispatcher(), web_session_id)));
}

void PPB_Instance_Proxy::SessionMessage(PP_Instance instance,
                                        uint32_t session_id,
                                        PP_Var message,
                                        PP_Var destination_url) {
  dispatcher()->Send(new PpapiHostMsg_PPBInstance_SessionMessage(
      API_ID_PPB_INSTANCE,
      instance,
      session_id,
      SerializedVarSendInput(dispatcher(), message),
      SerializedVarSendInput(dispatcher(), destination_url)));
}

void PPB_Instance_Proxy::SessionReady(PP_Instance instance,
                                      uint32_t session_id) {
  dispatcher()->Send(new PpapiHostMsg_PPBInstance_SessionReady(
      API_ID_PPB_INSTANCE, instance, session_id));
}

void PPB_Instance_Proxy::SessionClosed(PP_Instance instance,
                                       uint32_t session_id) {
  dispatcher()->Send(new PpapiHostMsg_PPBInstance_SessionClosed(
      API_ID_PPB_INSTANCE, instance, session_id));
}

void PPB_Instance_Proxy::SessionError(PP_Instance instance,
                                      uint32_t session_id,
                                      int32_t media_error,
                                      uint32_t system_code) {
  dispatcher()->Send(new PpapiHostMsg_PPBInstance_SessionError(
      API_ID_PPB_INSTANCE, instance, session_id, media_error, system_code));
}

void PPB_Instance_Proxy::DeliverBlock(PP_Instance instance,
                                      PP_Resource decrypted_block,
                                      const PP_DecryptedBlockInfo* block_info) {
  PP_Resource decrypted_block_host_resource = 0;

  if (decrypted_block) {
    Resource* object =
        PpapiGlobals::Get()->GetResourceTracker()->GetResource(decrypted_block);
    if (!object || object->pp_instance() != instance) {
      NOTREACHED();
      return;
    }
    decrypted_block_host_resource = object->host_resource().host_resource();
  }

  std::string serialized_block_info;
  if (!SerializeBlockInfo(*block_info, &serialized_block_info)) {
    NOTREACHED();
    return;
  }

  dispatcher()->Send(
      new PpapiHostMsg_PPBInstance_DeliverBlock(API_ID_PPB_INSTANCE,
          instance,
          decrypted_block_host_resource,
          serialized_block_info));
}

void PPB_Instance_Proxy::DecoderInitializeDone(
    PP_Instance instance,
    PP_DecryptorStreamType decoder_type,
    uint32_t request_id,
    PP_Bool success) {
  dispatcher()->Send(
      new PpapiHostMsg_PPBInstance_DecoderInitializeDone(
          API_ID_PPB_INSTANCE,
          instance,
          decoder_type,
          request_id,
          success));
}

void PPB_Instance_Proxy::DecoderDeinitializeDone(
    PP_Instance instance,
    PP_DecryptorStreamType decoder_type,
    uint32_t request_id) {
  dispatcher()->Send(
      new PpapiHostMsg_PPBInstance_DecoderDeinitializeDone(
          API_ID_PPB_INSTANCE,
          instance,
          decoder_type,
          request_id));
}

void PPB_Instance_Proxy::DecoderResetDone(PP_Instance instance,
                                          PP_DecryptorStreamType decoder_type,
                                          uint32_t request_id) {
  dispatcher()->Send(
      new PpapiHostMsg_PPBInstance_DecoderResetDone(
          API_ID_PPB_INSTANCE,
          instance,
          decoder_type,
          request_id));
}

void PPB_Instance_Proxy::DeliverFrame(PP_Instance instance,
                                      PP_Resource decrypted_frame,
                                      const PP_DecryptedFrameInfo* frame_info) {
  PP_Resource host_resource = 0;
  if (decrypted_frame != 0) {
    ResourceTracker* tracker = PpapiGlobals::Get()->GetResourceTracker();
    Resource* object = tracker->GetResource(decrypted_frame);

    if (!object || object->pp_instance() != instance) {
      NOTREACHED();
      return;
    }

    host_resource = object->host_resource().host_resource();
  }

  std::string serialized_frame_info;
  if (!SerializeBlockInfo(*frame_info, &serialized_frame_info)) {
    NOTREACHED();
    return;
  }

  dispatcher()->Send(
      new PpapiHostMsg_PPBInstance_DeliverFrame(API_ID_PPB_INSTANCE,
                                                instance,
                                                host_resource,
                                                serialized_frame_info));
}

void PPB_Instance_Proxy::DeliverSamples(
    PP_Instance instance,
    PP_Resource decrypted_samples,
    const PP_DecryptedSampleInfo* sample_info) {
  PP_Resource host_resource = 0;
  if (decrypted_samples != 0) {
    ResourceTracker* tracker = PpapiGlobals::Get()->GetResourceTracker();
    Resource* object = tracker->GetResource(decrypted_samples);

    if (!object || object->pp_instance() != instance) {
      NOTREACHED();
      return;
    }

    host_resource = object->host_resource().host_resource();
  }

  std::string serialized_sample_info;
  if (!SerializeBlockInfo(*sample_info, &serialized_sample_info)) {
    NOTREACHED();
    return;
  }

  dispatcher()->Send(
      new PpapiHostMsg_PPBInstance_DeliverSamples(API_ID_PPB_INSTANCE,
                                                  instance,
                                                  host_resource,
                                                  serialized_sample_info));
}
#endif  // !defined(OS_NACL)

void PPB_Instance_Proxy::PostMessage(PP_Instance instance,
                                     PP_Var message) {
  dispatcher()->Send(new PpapiHostMsg_PPBInstance_PostMessage(
      API_ID_PPB_INSTANCE,
      instance, SerializedVarSendInputShmem(dispatcher(), message,
                                            instance)));
}

PP_Bool PPB_Instance_Proxy::SetCursor(PP_Instance instance,
                                      PP_MouseCursor_Type type,
                                      PP_Resource image,
                                      const PP_Point* hot_spot) {
  // Some of these parameters are important for security. This check is in the
  // plugin process just for the convenience of the caller (since we don't
  // bother returning errors from the other process with a sync message). The
  // parameters will be validated again in the renderer.
  if (!ValidateSetCursorParams(type, image, hot_spot))
    return PP_FALSE;

  HostResource image_host_resource;
  if (image) {
    Resource* cursor_image =
        PpapiGlobals::Get()->GetResourceTracker()->GetResource(image);
    if (!cursor_image || cursor_image->pp_instance() != instance)
      return PP_FALSE;
    image_host_resource = cursor_image->host_resource();
  }

  dispatcher()->Send(new PpapiHostMsg_PPBInstance_SetCursor(
      API_ID_PPB_INSTANCE, instance, static_cast<int32_t>(type),
      image_host_resource, hot_spot ? *hot_spot : PP_MakePoint(0, 0)));
  return PP_TRUE;
}

int32_t PPB_Instance_Proxy::LockMouse(PP_Instance instance,
                                      scoped_refptr<TrackedCallback> callback) {
  // Save the mouse callback on the instance data.
  InstanceData* data = static_cast<PluginDispatcher*>(dispatcher())->
      GetInstanceData(instance);
  if (!data)
    return PP_ERROR_BADARGUMENT;
  if (TrackedCallback::IsPending(data->mouse_lock_callback))
    return PP_ERROR_INPROGRESS;  // Already have a pending callback.
  data->mouse_lock_callback = callback;

  dispatcher()->Send(new PpapiHostMsg_PPBInstance_LockMouse(
      API_ID_PPB_INSTANCE, instance));
  return PP_OK_COMPLETIONPENDING;
}

void PPB_Instance_Proxy::UnlockMouse(PP_Instance instance) {
  dispatcher()->Send(new PpapiHostMsg_PPBInstance_UnlockMouse(
      API_ID_PPB_INSTANCE, instance));
}

void PPB_Instance_Proxy::SetTextInputType(PP_Instance instance,
                                          PP_TextInput_Type type) {
  CancelAnyPendingRequestSurroundingText(instance);
  dispatcher()->Send(new PpapiHostMsg_PPBInstance_SetTextInputType(
      API_ID_PPB_INSTANCE, instance, type));
}

void PPB_Instance_Proxy::UpdateCaretPosition(PP_Instance instance,
                                             const PP_Rect& caret,
                                             const PP_Rect& bounding_box) {
  dispatcher()->Send(new PpapiHostMsg_PPBInstance_UpdateCaretPosition(
      API_ID_PPB_INSTANCE, instance, caret, bounding_box));
}

void PPB_Instance_Proxy::CancelCompositionText(PP_Instance instance) {
  CancelAnyPendingRequestSurroundingText(instance);
  dispatcher()->Send(new PpapiHostMsg_PPBInstance_CancelCompositionText(
      API_ID_PPB_INSTANCE, instance));
}

void PPB_Instance_Proxy::SelectionChanged(PP_Instance instance) {
  // The "right" way to do this is to send the message to the host. However,
  // all it will do is call RequestSurroundingText with a hardcoded number of
  // characters in response, which is an entire IPC round-trip.
  //
  // We can avoid this round-trip by just implementing the
  // RequestSurroundingText logic in the plugin process. If the logic in the
  // host becomes more complex (like a more adaptive number of characters),
  // we'll need to reevanuate whether we want to do the round trip instead.
  //
  // Be careful to post a task to avoid reentering the plugin.

  InstanceData* data =
      static_cast<PluginDispatcher*>(dispatcher())->GetInstanceData(instance);
  if (!data)
    return;
  data->should_do_request_surrounding_text = true;

  if (!data->is_request_surrounding_text_pending) {
    base::MessageLoop::current()->PostTask(
        FROM_HERE,
        RunWhileLocked(base::Bind(&RequestSurroundingText, instance)));
    data->is_request_surrounding_text_pending = true;
  }
}

void PPB_Instance_Proxy::UpdateSurroundingText(PP_Instance instance,
                                               const char* text,
                                               uint32_t caret,
                                               uint32_t anchor) {
  dispatcher()->Send(new PpapiHostMsg_PPBInstance_UpdateSurroundingText(
      API_ID_PPB_INSTANCE, instance, text, caret, anchor));
}

#if !defined(OS_NACL)
void PPB_Instance_Proxy::OnHostMsgGetWindowObject(
    PP_Instance instance,
    SerializedVarReturnValue result) {
  if (!dispatcher()->permissions().HasPermission(PERMISSION_PRIVATE))
    return;
  EnterInstanceNoLock enter(instance);
  if (enter.succeeded())
    result.Return(dispatcher(), enter.functions()->GetWindowObject(instance));
}

void PPB_Instance_Proxy::OnHostMsgGetOwnerElementObject(
    PP_Instance instance,
    SerializedVarReturnValue result) {
  if (!dispatcher()->permissions().HasPermission(PERMISSION_PRIVATE))
    return;
  EnterInstanceNoLock enter(instance);
  if (enter.succeeded()) {
    result.Return(dispatcher(),
                  enter.functions()->GetOwnerElementObject(instance));
  }
}

void PPB_Instance_Proxy::OnHostMsgBindGraphics(PP_Instance instance,
                                               PP_Resource device) {
  // Note that we ignroe the return value here. Otherwise, this would need to
  // be a slow sync call, and the plugin side of the proxy will have already
  // validated the resources, so we shouldn't see errors here that weren't
  // already caught.
  EnterInstanceNoLock enter(instance);
  if (enter.succeeded())
    enter.functions()->BindGraphics(instance, device);
}

void PPB_Instance_Proxy::OnHostMsgGetAudioHardwareOutputSampleRate(
    PP_Instance instance, uint32_t* result) {
  EnterInstanceNoLock enter(instance);
  if (enter.succeeded())
    *result = enter.functions()->GetAudioHardwareOutputSampleRate(instance);
}

void PPB_Instance_Proxy::OnHostMsgGetAudioHardwareOutputBufferSize(
    PP_Instance instance, uint32_t* result) {
  EnterInstanceNoLock enter(instance);
  if (enter.succeeded())
    *result = enter.functions()->GetAudioHardwareOutputBufferSize(instance);
}

void PPB_Instance_Proxy::OnHostMsgIsFullFrame(PP_Instance instance,
                                              PP_Bool* result) {
  EnterInstanceNoLock enter(instance);
  if (enter.succeeded())
    *result = enter.functions()->IsFullFrame(instance);
}

void PPB_Instance_Proxy::OnHostMsgExecuteScript(
    PP_Instance instance,
    SerializedVarReceiveInput script,
    SerializedVarOutParam out_exception,
    SerializedVarReturnValue result) {
  if (!dispatcher()->permissions().HasPermission(PERMISSION_PRIVATE))
    return;
  EnterInstanceNoLock enter(instance);
  if (enter.failed())
    return;

  if (dispatcher()->IsPlugin())
    NOTREACHED();
  else
    static_cast<HostDispatcher*>(dispatcher())->set_allow_plugin_reentrancy();

  result.Return(dispatcher(), enter.functions()->ExecuteScript(
      instance,
      script.Get(dispatcher()),
      out_exception.OutParam(dispatcher())));
}

void PPB_Instance_Proxy::OnHostMsgGetDefaultCharSet(
    PP_Instance instance,
    SerializedVarReturnValue result) {
  if (!dispatcher()->permissions().HasPermission(PERMISSION_DEV))
    return;
  EnterInstanceNoLock enter(instance);
  if (enter.succeeded())
    result.Return(dispatcher(), enter.functions()->GetDefaultCharSet(instance));
}

void PPB_Instance_Proxy::OnHostMsgSetPluginToHandleFindRequests(
    PP_Instance instance) {
  if (!dispatcher()->permissions().HasPermission(PERMISSION_PRIVATE))
    return;
  EnterInstanceNoLock enter(instance);
  if (enter.succeeded())
    enter.functions()->SetPluginToHandleFindRequests(instance);
}

void PPB_Instance_Proxy::OnHostMsgNumberOfFindResultsChanged(
    PP_Instance instance,
    int32_t total,
    PP_Bool final_result) {
  if (!dispatcher()->permissions().HasPermission(PERMISSION_PRIVATE))
    return;
  EnterInstanceNoLock enter(instance);
  if (enter.succeeded()) {
    enter.functions()->NumberOfFindResultsChanged(
        instance, total, final_result);
  }
}

void PPB_Instance_Proxy::OnHostMsgSelectFindResultChanged(
    PP_Instance instance,
    int32_t index) {
  if (!dispatcher()->permissions().HasPermission(PERMISSION_PRIVATE))
    return;
  EnterInstanceNoLock enter(instance);
  if (enter.succeeded())
    enter.functions()->SelectedFindResultChanged(instance, index);
}

void PPB_Instance_Proxy::OnHostMsgSetTickmarks(
    PP_Instance instance,
    const std::vector<PP_Rect>& tickmarks) {
  if (!dispatcher()->permissions().HasPermission(PERMISSION_PRIVATE))
    return;
  if (tickmarks.empty())
    return;
  EnterInstanceNoLock enter(instance);
  if (enter.succeeded()) {
    enter.functions()->SetTickmarks(instance,
                                    &tickmarks[0],
                                    static_cast<uint32_t>(tickmarks.size()));
  }
}

void PPB_Instance_Proxy::OnHostMsgSetFullscreen(PP_Instance instance,
                                                PP_Bool fullscreen,
                                                PP_Bool* result) {
  EnterInstanceNoLock enter(instance);
  if (enter.succeeded())
    *result = enter.functions()->SetFullscreen(instance, fullscreen);
}


void PPB_Instance_Proxy::OnHostMsgGetScreenSize(PP_Instance instance,
                                                PP_Bool* result,
                                                PP_Size* size) {
  EnterInstanceNoLock enter(instance);
  if (enter.succeeded())
    *result = enter.functions()->GetScreenSize(instance, size);
}

void PPB_Instance_Proxy::OnHostMsgRequestInputEvents(PP_Instance instance,
                                                     bool is_filtering,
                                                     uint32_t event_classes) {
  EnterInstanceNoLock enter(instance);
  if (enter.succeeded()) {
    if (is_filtering)
      enter.functions()->RequestFilteringInputEvents(instance, event_classes);
    else
      enter.functions()->RequestInputEvents(instance, event_classes);
  }
}

void PPB_Instance_Proxy::OnHostMsgClearInputEvents(PP_Instance instance,
                                                   uint32_t event_classes) {
  EnterInstanceNoLock enter(instance);
  if (enter.succeeded())
    enter.functions()->ClearInputEventRequest(instance, event_classes);
}

void PPB_Instance_Proxy::OnHostMsgPostMessage(
    PP_Instance instance,
    SerializedVarReceiveInput message) {
  EnterInstanceNoLock enter(instance);
  if (!message.is_valid_var()) {
    PpapiGlobals::Get()->LogWithSource(
        instance, PP_LOGLEVEL_ERROR, std::string(), kSerializationError);
    return;
  }

  if (enter.succeeded())
    enter.functions()->PostMessage(instance,
                                   message.GetForInstance(dispatcher(),
                                                          instance));
}

void PPB_Instance_Proxy::OnHostMsgLockMouse(PP_Instance instance) {
  // Need to be careful to always issue the callback.
  pp::CompletionCallback cb = callback_factory_.NewCallback(
      &PPB_Instance_Proxy::MouseLockCompleteInHost, instance);

  EnterInstanceNoLock enter(instance, cb.pp_completion_callback());
  if (enter.succeeded())
    enter.SetResult(enter.functions()->LockMouse(instance, enter.callback()));
}

void PPB_Instance_Proxy::OnHostMsgUnlockMouse(PP_Instance instance) {
  EnterInstanceNoLock enter(instance);
  if (enter.succeeded())
    enter.functions()->UnlockMouse(instance);
}

void PPB_Instance_Proxy::OnHostMsgGetDocumentURL(
    PP_Instance instance,
    PP_URLComponents_Dev* components,
    SerializedVarReturnValue result) {
  if (!dispatcher()->permissions().HasPermission(PERMISSION_DEV))
    return;
  EnterInstanceNoLock enter(instance);
  if (enter.succeeded()) {
    PP_Var document_url = enter.functions()->GetDocumentURL(instance,
                                                            components);
    result.Return(dispatcher(), document_url);
  }
}

void PPB_Instance_Proxy::OnHostMsgResolveRelativeToDocument(
    PP_Instance instance,
    SerializedVarReceiveInput relative,
    SerializedVarReturnValue result) {
  if (!dispatcher()->permissions().HasPermission(PERMISSION_DEV))
    return;
  EnterInstanceNoLock enter(instance);
  if (enter.succeeded()) {
    result.Return(dispatcher(),
                  enter.functions()->ResolveRelativeToDocument(
                      instance, relative.Get(dispatcher()), NULL));
  }
}

void PPB_Instance_Proxy::OnHostMsgDocumentCanRequest(
    PP_Instance instance,
    SerializedVarReceiveInput url,
    PP_Bool* result) {
  if (!dispatcher()->permissions().HasPermission(PERMISSION_DEV))
    return;
  EnterInstanceNoLock enter(instance);
  if (enter.succeeded()) {
    *result = enter.functions()->DocumentCanRequest(instance,
                                                    url.Get(dispatcher()));
  }
}

void PPB_Instance_Proxy::OnHostMsgDocumentCanAccessDocument(PP_Instance active,
                                                            PP_Instance target,
                                                            PP_Bool* result) {
  if (!dispatcher()->permissions().HasPermission(PERMISSION_DEV))
    return;
  EnterInstanceNoLock enter(active);
  if (enter.succeeded())
    *result = enter.functions()->DocumentCanAccessDocument(active, target);
}

void PPB_Instance_Proxy::OnHostMsgGetPluginInstanceURL(
    PP_Instance instance,
    SerializedVarReturnValue result) {
  if (!dispatcher()->permissions().HasPermission(PERMISSION_DEV))
    return;
  EnterInstanceNoLock enter(instance);
  if (enter.succeeded()) {
    result.Return(dispatcher(),
                  enter.functions()->GetPluginInstanceURL(instance, NULL));
  }
}

void PPB_Instance_Proxy::OnHostMsgGetPluginReferrerURL(
    PP_Instance instance,
    SerializedVarReturnValue result) {
  if (!dispatcher()->permissions().HasPermission(PERMISSION_DEV))
    return;
  EnterInstanceNoLock enter(instance);
  if (enter.succeeded()) {
    result.Return(dispatcher(),
                  enter.functions()->GetPluginReferrerURL(instance, NULL));
  }
}

void PPB_Instance_Proxy::OnHostMsgSessionCreated(
    PP_Instance instance,
    uint32_t session_id,
    SerializedVarReceiveInput web_session_id) {
  if (!dispatcher()->permissions().HasPermission(PERMISSION_PRIVATE))
    return;
  EnterInstanceNoLock enter(instance);
  if (enter.succeeded()) {
    enter.functions()->SessionCreated(
        instance, session_id, web_session_id.Get(dispatcher()));
  }
}

void PPB_Instance_Proxy::OnHostMsgSessionMessage(
    PP_Instance instance,
    uint32_t session_id,
    SerializedVarReceiveInput message,
    SerializedVarReceiveInput destination_url) {
  if (!dispatcher()->permissions().HasPermission(PERMISSION_PRIVATE))
    return;
  EnterInstanceNoLock enter(instance);
  if (enter.succeeded()) {
    enter.functions()->SessionMessage(instance,
                                      session_id,
                                      message.Get(dispatcher()),
                                      destination_url.Get(dispatcher()));
  }
}

void PPB_Instance_Proxy::OnHostMsgSessionReady(PP_Instance instance,
                                               uint32_t session_id) {
  if (!dispatcher()->permissions().HasPermission(PERMISSION_PRIVATE))
    return;
  EnterInstanceNoLock enter(instance);
  if (enter.succeeded()) {
    enter.functions()->SessionReady(instance, session_id);
  }
}

void PPB_Instance_Proxy::OnHostMsgSessionClosed(PP_Instance instance,
                                                uint32_t session_id) {
  if (!dispatcher()->permissions().HasPermission(PERMISSION_PRIVATE))
    return;
  EnterInstanceNoLock enter(instance);
  if (enter.succeeded()) {
    enter.functions()->SessionClosed(instance, session_id);
  }
}

void PPB_Instance_Proxy::OnHostMsgSessionError(PP_Instance instance,
                                               uint32_t session_id,
                                               int32_t media_error,
                                               uint32_t system_code) {
  if (!dispatcher()->permissions().HasPermission(PERMISSION_PRIVATE))
    return;
  EnterInstanceNoLock enter(instance);
  if (enter.succeeded()) {
    enter.functions()->SessionError(
        instance, session_id, media_error, system_code);
  }
}

void PPB_Instance_Proxy::OnHostMsgDeliverBlock(
    PP_Instance instance,
    PP_Resource decrypted_block,
    const std::string& serialized_block_info) {
  if (!dispatcher()->permissions().HasPermission(PERMISSION_PRIVATE))
    return;
  PP_DecryptedBlockInfo block_info;
  if (!DeserializeBlockInfo(serialized_block_info, &block_info))
    return;

  EnterInstanceNoLock enter(instance);
  if (enter.succeeded())
    enter.functions()->DeliverBlock(instance, decrypted_block, &block_info);
}

void PPB_Instance_Proxy::OnHostMsgDecoderInitializeDone(
    PP_Instance instance,
    PP_DecryptorStreamType decoder_type,
    uint32_t request_id,
    PP_Bool success) {
  if (!dispatcher()->permissions().HasPermission(PERMISSION_PRIVATE))
    return;
  EnterInstanceNoLock enter(instance);
  if (enter.succeeded()) {
    enter.functions()->DecoderInitializeDone(instance,
                                             decoder_type,
                                             request_id,
                                             success);
  }
}

void PPB_Instance_Proxy::OnHostMsgDecoderDeinitializeDone(
    PP_Instance instance,
    PP_DecryptorStreamType decoder_type,
    uint32_t request_id) {
  if (!dispatcher()->permissions().HasPermission(PERMISSION_PRIVATE))
    return;
  EnterInstanceNoLock enter(instance);
  if (enter.succeeded())
    enter.functions()->DecoderDeinitializeDone(instance,
                                               decoder_type,
                                               request_id);
}

void PPB_Instance_Proxy::OnHostMsgDecoderResetDone(
    PP_Instance instance,
    PP_DecryptorStreamType decoder_type,
    uint32_t request_id) {
  if (!dispatcher()->permissions().HasPermission(PERMISSION_PRIVATE))
    return;
  EnterInstanceNoLock enter(instance);
  if (enter.succeeded())
    enter.functions()->DecoderResetDone(instance, decoder_type, request_id);
}

void PPB_Instance_Proxy::OnHostMsgDeliverFrame(
    PP_Instance instance,
    PP_Resource decrypted_frame,
    const std::string& serialized_frame_info) {
  if (!dispatcher()->permissions().HasPermission(PERMISSION_PRIVATE))
    return;
  PP_DecryptedFrameInfo frame_info;
  if (!DeserializeBlockInfo(serialized_frame_info, &frame_info))
    return;

  EnterInstanceNoLock enter(instance);
  if (enter.succeeded())
    enter.functions()->DeliverFrame(instance, decrypted_frame, &frame_info);
}

void PPB_Instance_Proxy::OnHostMsgDeliverSamples(
    PP_Instance instance,
    PP_Resource audio_frames,
    const std::string& serialized_sample_info) {
  if (!dispatcher()->permissions().HasPermission(PERMISSION_PRIVATE))
    return;
  PP_DecryptedSampleInfo sample_info;
  if (!DeserializeBlockInfo(serialized_sample_info, &sample_info))
    return;

  EnterInstanceNoLock enter(instance);
  if (enter.succeeded())
    enter.functions()->DeliverSamples(instance, audio_frames, &sample_info);
}

void PPB_Instance_Proxy::OnHostMsgSetCursor(
    PP_Instance instance,
    int32_t type,
    const ppapi::HostResource& custom_image,
    const PP_Point& hot_spot) {
  // This API serves PPB_CursorControl_Dev and PPB_MouseCursor, so is public.
  EnterInstanceNoLock enter(instance);
  if (enter.succeeded()) {
    enter.functions()->SetCursor(
        instance, static_cast<PP_MouseCursor_Type>(type),
        custom_image.host_resource(), &hot_spot);
  }
}

void PPB_Instance_Proxy::OnHostMsgSetTextInputType(PP_Instance instance,
                                                   PP_TextInput_Type type) {
  EnterInstanceNoLock enter(instance);
  if (enter.succeeded())
    enter.functions()->SetTextInputType(instance, type);
}

void PPB_Instance_Proxy::OnHostMsgUpdateCaretPosition(
    PP_Instance instance,
    const PP_Rect& caret,
    const PP_Rect& bounding_box) {
  EnterInstanceNoLock enter(instance);
  if (enter.succeeded())
    enter.functions()->UpdateCaretPosition(instance, caret, bounding_box);
}

void PPB_Instance_Proxy::OnHostMsgCancelCompositionText(PP_Instance instance) {
  EnterInstanceNoLock enter(instance);
  if (enter.succeeded())
    enter.functions()->CancelCompositionText(instance);
}

void PPB_Instance_Proxy::OnHostMsgUpdateSurroundingText(
    PP_Instance instance,
    const std::string& text,
    uint32_t caret,
    uint32_t anchor) {
  EnterInstanceNoLock enter(instance);
  if (enter.succeeded()) {
    enter.functions()->UpdateSurroundingText(instance, text.c_str(), caret,
                                             anchor);
  }
}
#endif  // !defined(OS_NACL)

void PPB_Instance_Proxy::OnPluginMsgMouseLockComplete(PP_Instance instance,
                                                      int32_t result) {
  if (!dispatcher()->IsPlugin())
    return;

  // Save the mouse callback on the instance data.
  InstanceData* data = static_cast<PluginDispatcher*>(dispatcher())->
      GetInstanceData(instance);
  if (!data)
    return;  // Instance was probably deleted.
  if (!TrackedCallback::IsPending(data->mouse_lock_callback)) {
    NOTREACHED();
    return;
  }
  data->mouse_lock_callback->Run(result);
}

#if !defined(OS_NACL)
void PPB_Instance_Proxy::MouseLockCompleteInHost(int32_t result,
                                                 PP_Instance instance) {
  dispatcher()->Send(new PpapiMsg_PPBInstance_MouseLockComplete(
      API_ID_PPB_INSTANCE, instance, result));
}
#endif  // !defined(OS_NACL)

void PPB_Instance_Proxy::CancelAnyPendingRequestSurroundingText(
    PP_Instance instance) {
  InstanceData* data = static_cast<PluginDispatcher*>(dispatcher())->
      GetInstanceData(instance);
  if (!data)
    return;  // Instance was probably deleted.
  data->should_do_request_surrounding_text = false;
}

}  // namespace proxy
}  // namespace ppapi