content/renderer/render_view_impl.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CONTENT_RENDERER_RENDER_VIEW_IMPL_H_
   6 #define CONTENT_RENDERER_RENDER_VIEW_IMPL_H_
   7
   8 #include <deque>
   9 #include <map>
  10 #include <set>
  11 #include <string>
  12 #include <vector>
  13
  14 #include "base/basictypes.h"
  15 #include "base/gtest_prod_util.h"
  16 #include "base/id_map.h"
  17 #include "base/memory/linked_ptr.h"
  18 #include "base/memory/weak_ptr.h"
  19 #include "base/observer_list.h"
  20 #include "base/process.h"
  21 #include "base/timer.h"
  22 #include "build/build_config.h"
  23 #include "content/common/content_export.h"
  24 #include "content/common/drag_event_source_info.h"
  25 #include "content/common/edit_command.h"
  26 #include "content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.h"
  27 #include "content/common/navigation_gesture.h"
  28 #include "content/common/view_message_enums.h"
  29 #include "content/public/common/javascript_message_type.h"
  30 #include "content/public/common/page_zoom.h"
  31 #include "content/public/common/referrer.h"
  32 #include "content/public/common/renderer_preferences.h"
  33 #include "content/public/common/stop_find_action.h"
  34 #include "content/public/renderer/render_view.h"
  35 #include "content/renderer/mouse_lock_dispatcher.h"
  36 #include "content/renderer/render_view_pepper_helper.h"
  37 #include "content/renderer/render_widget.h"
  38 #include "content/renderer/renderer_webcookiejar_impl.h"
  39 #include "ipc/ipc_platform_file.h"
  40 #include "third_party/WebKit/Source/Platform/chromium/public/WebFileSystem.h"
  41 #include "third_party/WebKit/Source/Platform/chromium/public/WebGraphicsContext3D.h"
  42 #include "third_party/WebKit/Source/WebKit/chromium/public/WebConsoleMessage.h"
  43 #include "third_party/WebKit/Source/WebKit/chromium/public/WebDataSource.h"
  44 #include "third_party/WebKit/Source/WebKit/chromium/public/WebFrameClient.h"
  45 #include "third_party/WebKit/Source/WebKit/chromium/public/WebHistoryItem.h"
  46 #include "third_party/WebKit/Source/WebKit/chromium/public/WebIconURL.h"
  47 #include "third_party/WebKit/Source/WebKit/chromium/public/WebInputEvent.h"
  48 #include "third_party/WebKit/Source/WebKit/chromium/public/WebNavigationType.h"
  49 #include "third_party/WebKit/Source/WebKit/chromium/public/WebNode.h"
  50 #include "third_party/WebKit/Source/WebKit/chromium/public/WebPageSerializerClient.h"
  51 #include "third_party/WebKit/Source/WebKit/chromium/public/WebPageVisibilityState.h"
  52 #include "third_party/WebKit/Source/WebKit/chromium/public/WebSecurityOrigin.h"
  53 #include "third_party/WebKit/Source/WebKit/chromium/public/WebViewClient.h"
  54 #include "ui/surface/transport_dib.h"
  55 #include "webkit/glue/webpreferences.h"
  56 #include "webkit/media/webmediaplayer_delegate.h"
  57 #include "webkit/plugins/npapi/webplugin_page_delegate.h"
  58
  59 #if defined(OS_ANDROID)
  60 #include "content/renderer/android/content_detector.h"
  61 #include "third_party/WebKit/Source/WebKit/chromium/public/WebContentDetectionResult.h"
  62 #endif
  63
  64 #if defined(COMPILER_MSVC)
  65 // RenderViewImpl is a diamond-shaped hierarchy, with WebWidgetClient at the
  66 // root. VS warns when we inherit the WebWidgetClient method implementations
  67 // from RenderWidget.  It's safe to ignore that warning.
  68 #pragma warning(disable: 4250)
  69 #endif
  70
  71 class CommandLine;
  72 class PepperDeviceTest;
  73 class SkBitmap;
  74 struct PP_NetAddress_Private;
  75 struct ViewMsg_Navigate_Params;
  76 struct ViewMsg_PostMessage_Params;
  77 struct ViewMsg_StopFinding_Params;
  78 struct ViewMsg_SwapOut_Params;
  79 struct WebDropData;
  80
  81 namespace ui {
  82 struct SelectedFileInfo;
  83 }  // namespace ui
  84
  85 namespace webkit {
  86
  87 namespace ppapi {
  88 class PluginInstance;
  89 }  // namespace ppapi
  90
  91 }  // namespace webkit
  92
  93 namespace webkit_glue {
  94 class ImageResourceFetcher;
  95 class ResourceFetcher;
  96 }
  97
  98 #if defined(OS_ANDROID)
  99 namespace webkit_media {
 100 class WebMediaPlayerManagerAndroid;
 101 }
 102 #endif
 103
 104 namespace WebKit {
 105 class WebApplicationCacheHost;
 106 class WebApplicationCacheHostClient;
 107 class WebDOMMessageEvent;
 108 class WebDataSource;
 109 class WebDateTimeChooserCompletion;
 110 class WebDragData;
 111 class WebGeolocationClient;
 112 class WebGestureEvent;
 113 class WebIconURL;
 114 class WebImage;
 115 class WebPeerConnection00Handler;
 116 class WebPeerConnection00HandlerClient;
 117 class WebMediaPlayer;
 118 class WebMediaPlayerClient;
 119 class WebMouseEvent;
 120 class WebPeerConnectionHandler;
 121 class WebPeerConnectionHandlerClient;
 122 class WebSocketStreamHandle;
 123 class WebSpeechInputController;
 124 class WebSpeechInputListener;
 125 class WebSpeechRecognizer;
 126 class WebStorageNamespace;
 127 class WebTouchEvent;
 128 class WebURLRequest;
 129 class WebUserMediaClient;
 130 struct WebActiveWheelFlingParameters;
 131 struct WebDateTimeChooserParams;
 132 struct WebFileChooserParams;
 133 struct WebFindOptions;
 134 struct WebMediaPlayerAction;
 135 struct WebPluginAction;
 136 struct WebPoint;
 137 struct WebWindowFeatures;
 138
 139 #if defined(OS_ANDROID)
 140 class WebHitTestResult;
 141 #endif
 142 }
 143
 144 namespace content {
 145 class BrowserPluginManager;
 146 class DeviceOrientationDispatcher;
 147 class DevToolsAgent;
 148 class DocumentState;
 149 class DomAutomationController;
 150 class ExternalPopupMenu;
 151 class FaviconHelper;
 152 class GeolocationDispatcher;
 153 class InputTagSpeechDispatcher;
 154 class JavaBridgeDispatcher;
 155 class LoadProgressTracker;
 156 class MediaStreamDispatcher;
 157 class MediaStreamImpl;
 158 class MouseLockDispatcher;
 159 class NavigationState;
 160 class NotificationProvider;
 161 class RenderViewObserver;
 162 class RenderViewTest;
 163 class RendererAccessibility;
 164 class RendererDateTimePicker;
 165 class RendererPpapiHost;
 166 class RendererWebColorChooserImpl;
 167 class RenderWidgetFullscreenPepper;
 168 class SpeechRecognitionDispatcher;
 169 class WebPluginDelegateProxy;
 170 struct CustomContextMenuContext;
 171 struct FaviconURL;
 172 struct FileChooserParams;
 173 struct RenderViewImplParams;
 174
 175 #if defined(OS_ANDROID)
 176 class WebMediaPlayerProxyImplAndroid;
 177 #endif
 178
 179 // We need to prevent a page from trying to create infinite popups. It is not
 180 // as simple as keeping a count of the number of immediate children
 181 // popups. Having an html file that window.open()s itself would create
 182 // an unlimited chain of RenderViews who only have one RenderView child.
 183 //
 184 // Therefore, each new top level RenderView creates a new counter and shares it
 185 // with all its children and grandchildren popup RenderViewImpls created with
 186 // createView() to have a sort of global limit for the page so no more than
 187 // kMaximumNumberOfPopups popups are created.
 188 //
 189 // This is a RefCounted holder of an int because I can't say
 190 // scoped_refptr<int>.
 191 typedef base::RefCountedData<int> SharedRenderViewCounter;
 192
 193 //
 194 // RenderView is an object that manages a WebView object, and provides a
 195 // communication interface with an embedding application process
 196 //
 197 class CONTENT_EXPORT RenderViewImpl
 198     : public RenderWidget,
 199       NON_EXPORTED_BASE(public WebKit::WebViewClient),
 200       NON_EXPORTED_BASE(public WebKit::WebFrameClient),
 201       NON_EXPORTED_BASE(public WebKit::WebPageSerializerClient),
 202       public RenderView,
 203       NON_EXPORTED_BASE(public webkit::npapi::WebPluginPageDelegate),
 204       NON_EXPORTED_BASE(public webkit_media::WebMediaPlayerDelegate),
 205       public base::SupportsWeakPtr<RenderViewImpl> {
 206  public:
 207   // Creates a new RenderView. If this is a blocked popup or as a new tab,
 208   // opener_id is the routing ID of the RenderView responsible for creating this
 209   // RenderView. |counter| is either a currently initialized counter, or NULL
 210   // (in which case we treat this RenderView as a top level window).
 211   static RenderViewImpl* Create(
 212       int32 opener_id,
 213       const RendererPreferences& renderer_prefs,
 214       const WebPreferences& webkit_prefs,
 215       SharedRenderViewCounter* counter,
 216       int32 routing_id,
 217       int32 surface_id,
 218       int64 session_storage_namespace_id,
 219       const string16& frame_name,
 220       bool is_renderer_created,
 221       bool swapped_out,
 222       int32 next_page_id,
 223       const WebKit::WebScreenInfo& screen_info,
 224       AccessibilityMode accessibility_mode,
 225       bool allow_partial_swap);
 226
 227   // Used by content_layouttest_support to hook into the creation of
 228   // RenderViewImpls.
 229   static void InstallCreateHook(
 230       RenderViewImpl* (*create_render_view_impl)(RenderViewImplParams*));
 231
 232   // Returns the RenderViewImpl containing the given WebView.
 233   static RenderViewImpl* FromWebView(WebKit::WebView* webview);
 234
 235   // Returns the RenderViewImpl for the given routing ID.
 236   static RenderViewImpl* FromRoutingID(int routing_id);
 237
 238   // May return NULL when the view is closing.
 239   WebKit::WebView* webview() const;
 240
 241   int history_list_offset() const { return history_list_offset_; }
 242
 243   const WebPreferences& webkit_preferences() const {
 244     return webkit_preferences_;
 245   }
 246
 247   void set_send_content_state_immediately(bool value) {
 248     send_content_state_immediately_ = value;
 249   }
 250
 251   MediaStreamDispatcher* media_stream_dispatcher() {
 252     return media_stream_dispatcher_;
 253   }
 254
 255   MouseLockDispatcher* mouse_lock_dispatcher() {
 256     return mouse_lock_dispatcher_;
 257   }
 258
 259 #if defined(OS_ANDROID)
 260   webkit_media::WebMediaPlayerManagerAndroid* media_player_manager() {
 261     return media_player_manager_.get();
 262   }
 263 #endif
 264
 265   // Lazily initialize this view's BrowserPluginManager and return it.
 266   BrowserPluginManager* GetBrowserPluginManager();
 267
 268   // Functions to add and remove observers for this object.
 269   void AddObserver(RenderViewObserver* observer);
 270   void RemoveObserver(RenderViewObserver* observer);
 271
 272   // Adds the given file chooser request to the file_chooser_completion_ queue
 273   // (see that var for more) and requests the chooser be displayed if there are
 274   // no other waiting items in the queue.
 275   //
 276   // Returns true if the chooser was successfully scheduled. False means we
 277   // didn't schedule anything.
 278   bool ScheduleFileChooser(const FileChooserParams& params,
 279                            WebKit::WebFileChooserCompletion* completion);
 280
 281   void LoadNavigationErrorPage(
 282       WebKit::WebFrame* frame,
 283       const WebKit::WebURLRequest& failed_request,
 284       const WebKit::WebURLError& error,
 285       const std::string& html,
 286       bool replace);
 287
 288   // Plugin-related functions --------------------------------------------------
 289   // (See also WebPluginPageDelegate implementation.)
 290
 291   // Notification that the given plugin has crashed.
 292   void PluginCrashed(const base::FilePath& plugin_path,
 293                      base::ProcessId plugin_pid);
 294
 295   // Creates a fullscreen container for a pepper plugin instance.
 296   RenderWidgetFullscreenPepper* CreatePepperFullscreenContainer(
 297       webkit::ppapi::PluginInstance* plugin);
 298
 299   // Informs the render view that a PPAPI plugin has gained or lost focus.
 300   void PpapiPluginFocusChanged();
 301
 302   // Informs the render view that a PPAPI plugin has changed text input status.
 303   void PpapiPluginTextInputTypeChanged();
 304   void PpapiPluginCaretPositionChanged();
 305
 306   // Cancels current composition.
 307   void PpapiPluginCancelComposition();
 308
 309   // Informs the render view that a PPAPI plugin has changed selection.
 310   void PpapiPluginSelectionChanged();
 311
 312   // Notification that a PPAPI plugin has been created.
 313   void PpapiPluginCreated(RendererPpapiHost* host);
 314
 315   // Retrieves the current caret position if a PPAPI plugin has focus.
 316   bool GetPpapiPluginCaretBounds(gfx::Rect* rect);
 317
 318   // Simulates IME events for testing purpose.
 319   void SimulateImeSetComposition(
 320       const string16& text,
 321       const std::vector<WebKit::WebCompositionUnderline>& underlines,
 322       int selection_start,
 323       int selection_end);
 324   void SimulateImeConfirmComposition(const string16& text,
 325                                      const ui::Range& replacement_range);
 326
 327 #if defined(OS_MACOSX) || defined(OS_WIN)
 328   // Informs the render view that the given plugin has gained or lost focus.
 329   void PluginFocusChanged(bool focused, int plugin_id);
 330 #endif
 331
 332 #if defined(OS_MACOSX)
 333   // Starts plugin IME.
 334   void StartPluginIme();
 335 #endif
 336
 337   void RegisterPluginDelegate(WebPluginDelegateProxy* delegate);
 338   void UnregisterPluginDelegate(WebPluginDelegateProxy* delegate);
 339
 340   // Helper function to retrieve information about a plugin for a URL and mime
 341   // type. Returns false if no plugin was found.
 342   // |actual_mime_type| is the actual mime type supported by the
 343   // plugin found that match the URL given (one for each item in
 344   // |info|).
 345   bool GetPluginInfo(const GURL& url,
 346                      const GURL& page_url,
 347                      const std::string& mime_type,
 348                      webkit::WebPluginInfo* plugin_info,
 349                      std::string* actual_mime_type);
 350
 351   void TransferActiveWheelFlingAnimation(
 352       const WebKit::WebActiveWheelFlingParameters& params);
 353
 354   // Returns true if the focused element is editable text from the perspective
 355   // of IME support (also used for on-screen keyboard). Works correctly inside
 356   // supported PPAPI plug-ins.
 357   bool HasIMETextFocus();
 358
 359   // Callback for use with GetWindowSnapshot.
 360   typedef base::Callback<void(
 361       const gfx::Size&, const std::vector<unsigned char>&)>
 362       WindowSnapshotCallback;
 363
 364   void GetWindowSnapshot(const WindowSnapshotCallback& callback);
 365
 366   // Dispatches the current navigation state to the browser. Called on a
 367   // periodic timer so we don't send too many messages.
 368   void SyncNavigationState();
 369
 370   // Returns the length of the session history of this RenderView. Note that
 371   // this only coincides with the actual length of the session history if this
 372   // RenderView is the currently active RenderView of a WebContents.
 373   unsigned GetLocalSessionHistoryLengthForTesting() const;
 374
 375   // Invokes OnSetFocus and marks the widget as active depending on the value
 376   // of |enable|. This is used for layout tests that need to control the focus
 377   // synchronously from the renderer.
 378   void SetFocusAndActivateForTesting(bool enable);
 379
 380   // Change the device scale factor and force the compositor to resize.
 381   void SetDeviceScaleFactorForTesting(float factor);
 382
 383   // IPC::Listener implementation ----------------------------------------------
 384
 385   virtual bool OnMessageReceived(const IPC::Message& msg) OVERRIDE;
 386
 387   // WebKit::WebWidgetClient implementation ------------------------------------
 388
 389   // Most methods are handled by RenderWidget.
 390   virtual void didFocus();
 391   virtual void didBlur();
 392   virtual void show(WebKit::WebNavigationPolicy policy);
 393   virtual void runModal();
 394   virtual bool enterFullScreen();
 395   virtual void exitFullScreen();
 396   virtual bool requestPointerLock();
 397   virtual void requestPointerUnlock();
 398   virtual bool isPointerLocked();
 399   virtual void didActivateCompositor(int input_handler_identifier);
 400   virtual void didHandleGestureEvent(const WebKit::WebGestureEvent& event,
 401                                      bool event_cancelled) OVERRIDE;
 402
 403   // WebKit::WebViewClient implementation --------------------------------------
 404
 405   virtual WebKit::WebView* createView(
 406       WebKit::WebFrame* creator,
 407       const WebKit::WebURLRequest& request,
 408       const WebKit::WebWindowFeatures& features,
 409       const WebKit::WebString& frame_name,
 410       WebKit::WebNavigationPolicy policy);
 411   virtual WebKit::WebWidget* createPopupMenu(WebKit::WebPopupType popup_type);
 412   virtual WebKit::WebExternalPopupMenu* createExternalPopupMenu(
 413       const WebKit::WebPopupMenuInfo& popup_menu_info,
 414       WebKit::WebExternalPopupMenuClient* popup_menu_client);
 415   virtual WebKit::WebStorageNamespace* createSessionStorageNamespace(
 416       unsigned quota);
 417   virtual void didAddMessageToConsole(
 418       const WebKit::WebConsoleMessage& message,
 419       const WebKit::WebString& source_name,
 420       unsigned source_line);
 421   virtual void printPage(WebKit::WebFrame* frame);
 422   virtual WebKit::WebNotificationPresenter* notificationPresenter();
 423   virtual bool enumerateChosenDirectory(
 424       const WebKit::WebString& path,
 425       WebKit::WebFileChooserCompletion* chooser_completion);
 426   virtual void initializeHelperPluginWebFrame(WebKit::WebHelperPlugin*);
 427   virtual void didStartLoading();
 428   virtual void didStopLoading();
 429   virtual void didChangeLoadProgress(WebKit::WebFrame* frame,
 430                                      double load_progress);
 431   virtual void didCancelCompositionOnSelectionChange();
 432   virtual void didChangeSelection(bool is_selection_empty);
 433   virtual void didExecuteCommand(const WebKit::WebString& command_name);
 434   virtual bool handleCurrentKeyboardEvent();
 435   virtual WebKit::WebColorChooser* createColorChooser(
 436       WebKit::WebColorChooserClient*, const WebKit::WebColor& initial_color);
 437   virtual bool runFileChooser(
 438       const WebKit::WebFileChooserParams& params,
 439       WebKit::WebFileChooserCompletion* chooser_completion);
 440   virtual void runModalAlertDialog(WebKit::WebFrame* frame,
 441                                    const WebKit::WebString& message);
 442   virtual bool runModalConfirmDialog(WebKit::WebFrame* frame,
 443                                      const WebKit::WebString& message);
 444   virtual bool runModalPromptDialog(WebKit::WebFrame* frame,
 445                                     const WebKit::WebString& message,
 446                                     const WebKit::WebString& default_value,
 447                                     WebKit::WebString* actual_value);
 448   virtual bool runModalBeforeUnloadDialog(WebKit::WebFrame* frame,
 449                                           const WebKit::WebString& message);
 450   virtual void showContextMenu(WebKit::WebFrame* frame,
 451                                const WebKit::WebContextMenuData& data);
 452   virtual void setStatusText(const WebKit::WebString& text);
 453   virtual void setMouseOverURL(const WebKit::WebURL& url);
 454   virtual void setKeyboardFocusURL(const WebKit::WebURL& url);
 455   virtual void startDragging(WebKit::WebFrame* frame,
 456                              const WebKit::WebDragData& data,
 457                              WebKit::WebDragOperationsMask mask,
 458                              const WebKit::WebImage& image,
 459                              const WebKit::WebPoint& imageOffset);
 460   virtual bool acceptsLoadDrops();
 461   virtual void focusNext();
 462   virtual void focusPrevious();
 463   virtual void focusedNodeChanged(const WebKit::WebNode& node);
 464   virtual void numberOfWheelEventHandlersChanged(unsigned num_handlers);
 465   virtual void didUpdateLayout();
 466 #if defined(OS_ANDROID)
 467   virtual bool didTapMultipleTargets(
 468       const WebKit::WebGestureEvent& event,
 469       const WebKit::WebVector<WebKit::WebRect>& target_rects);
 470 #endif
 471   virtual void navigateBackForwardSoon(int offset);
 472   virtual int historyBackListCount();
 473   virtual int historyForwardListCount();
 474   virtual void postAccessibilityNotification(
 475       const WebKit::WebAccessibilityObject& obj,
 476       WebKit::WebAccessibilityNotification notification);
 477   virtual void didUpdateInspectorSetting(const WebKit::WebString& key,
 478                                          const WebKit::WebString& value);
 479   virtual WebKit::WebGeolocationClient* geolocationClient();
 480   virtual WebKit::WebSpeechInputController* speechInputController(
 481       WebKit::WebSpeechInputListener* listener);
 482   virtual WebKit::WebSpeechRecognizer* speechRecognizer();
 483   virtual WebKit::WebDeviceOrientationClient* deviceOrientationClient();
 484   virtual void zoomLimitsChanged(double minimum_level, double maximum_level);
 485   virtual void zoomLevelChanged();
 486   virtual void registerProtocolHandler(const WebKit::WebString& scheme,
 487                                        const WebKit::WebString& base_url,
 488                                        const WebKit::WebString& url,
 489                                        const WebKit::WebString& title);
 490   virtual WebKit::WebPageVisibilityState visibilityState() const;
 491   virtual WebKit::WebUserMediaClient* userMediaClient();
 492   virtual void draggableRegionsChanged();
 493
 494 #if defined(OS_ANDROID)
 495   virtual void scheduleContentIntent(const WebKit::WebURL& intent);
 496   virtual void cancelScheduledContentIntents();
 497   virtual WebKit::WebContentDetectionResult detectContentAround(
 498       const WebKit::WebHitTestResult& touch_hit);
 499
 500   // Only used on Android since all other platforms implement
 501   // date and time input fields using MULTIPLE_FIELDS_UI
 502   virtual bool openDateTimeChooser(const WebKit::WebDateTimeChooserParams&,
 503                                    WebKit::WebDateTimeChooserCompletion*);
 504 #endif
 505
 506   // WebKit::WebFrameClient implementation -------------------------------------
 507
 508   virtual WebKit::WebPlugin* createPlugin(
 509       WebKit::WebFrame* frame,
 510       const WebKit::WebPluginParams& params);
 511   virtual WebKit::WebSharedWorker* createSharedWorker(
 512       WebKit::WebFrame* frame, const WebKit::WebURL& url,
 513       const WebKit::WebString& name, unsigned long long documentId);
 514   virtual WebKit::WebMediaPlayer* createMediaPlayer(
 515       WebKit::WebFrame* frame,
 516       const WebKit::WebURL& url,
 517       WebKit::WebMediaPlayerClient* client);
 518   virtual WebKit::WebApplicationCacheHost* createApplicationCacheHost(
 519       WebKit::WebFrame* frame,
 520       WebKit::WebApplicationCacheHostClient* client);
 521   virtual WebKit::WebCookieJar* cookieJar(WebKit::WebFrame* frame);
 522   virtual void didCreateFrame(WebKit::WebFrame* parent,
 523                               WebKit::WebFrame* child);
 524   virtual void didDisownOpener(WebKit::WebFrame* frame);
 525   virtual void frameDetached(WebKit::WebFrame* frame);
 526   virtual void willClose(WebKit::WebFrame* frame);
 527   virtual void didChangeName(WebKit::WebFrame* frame,
 528                              const WebKit::WebString& name);
 529   virtual void loadURLExternally(WebKit::WebFrame* frame,
 530                                  const WebKit::WebURLRequest& request,
 531                                  WebKit::WebNavigationPolicy policy);
 532   virtual void loadURLExternally(WebKit::WebFrame* frame,
 533                                  const WebKit::WebURLRequest& request,
 534                                  WebKit::WebNavigationPolicy policy,
 535                                  const WebKit::WebString& suggested_name);
 536
 537   // The WebDataSource::ExtraData* is assumed to be a DocumentState* subclass.
 538   virtual WebKit::WebNavigationPolicy decidePolicyForNavigation(
 539       WebKit::WebFrame* frame,
 540       WebKit::WebDataSource::ExtraData* extraData,
 541       const WebKit::WebURLRequest& request,
 542       WebKit::WebNavigationType type,
 543       WebKit::WebNavigationPolicy default_policy,
 544       bool is_redirect);
 545   // DEPRECATED.
 546   virtual WebKit::WebNavigationPolicy decidePolicyForNavigation(
 547       WebKit::WebFrame* frame,
 548       const WebKit::WebURLRequest& request,
 549       WebKit::WebNavigationType type,
 550       WebKit::WebNavigationPolicy default_policy,
 551       bool is_redirect);
 552   virtual bool canHandleRequest(WebKit::WebFrame* frame,
 553                                 const WebKit::WebURLRequest& request);
 554   virtual WebKit::WebURLError cannotHandleRequestError(
 555       WebKit::WebFrame* frame,
 556       const WebKit::WebURLRequest& request);
 557   virtual WebKit::WebURLError cancelledError(
 558       WebKit::WebFrame* frame,
 559       const WebKit::WebURLRequest& request);
 560   virtual void unableToImplementPolicyWithError(
 561       WebKit::WebFrame* frame,
 562       const WebKit::WebURLError& error);
 563   virtual void willSendSubmitEvent(WebKit::WebFrame* frame,
 564                                    const WebKit::WebFormElement& form);
 565   virtual void willSubmitForm(WebKit::WebFrame* frame,
 566                               const WebKit::WebFormElement& form);
 567   virtual void willPerformClientRedirect(WebKit::WebFrame* frame,
 568                                          const WebKit::WebURL& from,
 569                                          const WebKit::WebURL& to,
 570                                          double interval,
 571                                          double fire_time);
 572   virtual void didCancelClientRedirect(WebKit::WebFrame* frame);
 573   virtual void didCompleteClientRedirect(WebKit::WebFrame* frame,
 574                                          const WebKit::WebURL& from);
 575   virtual void didCreateDataSource(WebKit::WebFrame* frame,
 576                                    WebKit::WebDataSource* datasource);
 577   virtual void didStartProvisionalLoad(WebKit::WebFrame* frame);
 578   virtual void didReceiveServerRedirectForProvisionalLoad(
 579       WebKit::WebFrame* frame);
 580   virtual void didFailProvisionalLoad(WebKit::WebFrame* frame,
 581                                       const WebKit::WebURLError& error);
 582   virtual void didReceiveDocumentData(WebKit::WebFrame* frame,
 583                                       const char* data, size_t length,
 584                                       bool& prevent_default);
 585   virtual void didCommitProvisionalLoad(WebKit::WebFrame* frame,
 586                                         bool is_new_navigation);
 587   virtual void didClearWindowObject(WebKit::WebFrame* frame);
 588   virtual void didCreateDocumentElement(WebKit::WebFrame* frame);
 589   virtual void didReceiveTitle(WebKit::WebFrame* frame,
 590                                const WebKit::WebString& title,
 591                                WebKit::WebTextDirection direction);
 592   virtual void didChangeIcon(WebKit::WebFrame*,
 593                              WebKit::WebIconURL::Type) OVERRIDE;
 594   virtual void didFinishDocumentLoad(WebKit::WebFrame* frame);
 595   virtual void didHandleOnloadEvents(WebKit::WebFrame* frame);
 596   virtual void didFailLoad(WebKit::WebFrame* frame,
 597                            const WebKit::WebURLError& error);
 598   virtual void didFinishLoad(WebKit::WebFrame* frame);
 599   virtual void didNavigateWithinPage(WebKit::WebFrame* frame,
 600                                      bool is_new_navigation);
 601   virtual void didUpdateCurrentHistoryItem(WebKit::WebFrame* frame);
 602   virtual void assignIdentifierToRequest(WebKit::WebFrame* frame,
 603                                          unsigned identifier,
 604                                          const WebKit::WebURLRequest& request);
 605   virtual void willSendRequest(WebKit::WebFrame* frame,
 606                                unsigned identifier,
 607                                WebKit::WebURLRequest& request,
 608                                const WebKit::WebURLResponse& redirect_response);
 609   virtual void didReceiveResponse(WebKit::WebFrame* frame,
 610                                   unsigned identifier,
 611                                   const WebKit::WebURLResponse& response);
 612   virtual void didFinishResourceLoad(WebKit::WebFrame* frame,
 613                                      unsigned identifier);
 614   virtual void didFailResourceLoad(WebKit::WebFrame* frame,
 615                                    unsigned identifier,
 616                                    const WebKit::WebURLError& error);
 617   virtual void didLoadResourceFromMemoryCache(
 618       WebKit::WebFrame* frame,
 619       const WebKit::WebURLRequest& request,
 620       const WebKit::WebURLResponse&);
 621   virtual void didDisplayInsecureContent(WebKit::WebFrame* frame);
 622   virtual void didRunInsecureContent(
 623       WebKit::WebFrame* frame,
 624       const WebKit::WebSecurityOrigin& origin,
 625       const WebKit::WebURL& target);
 626   virtual void didExhaustMemoryAvailableForScript(WebKit::WebFrame* frame);
 627   virtual void didCreateScriptContext(WebKit::WebFrame* frame,
 628                                       v8::Handle<v8::Context>,
 629                                       int extension_group,
 630                                       int world_id);
 631   virtual void willReleaseScriptContext(WebKit::WebFrame* frame,
 632                                         v8::Handle<v8::Context>,
 633                                         int world_id);
 634   virtual void didChangeScrollOffset(WebKit::WebFrame* frame);
 635   virtual void willInsertBody(WebKit::WebFrame* frame) OVERRIDE;
 636   virtual void didFirstVisuallyNonEmptyLayout(WebKit::WebFrame*) OVERRIDE;
 637   virtual void didChangeContentsSize(WebKit::WebFrame* frame,
 638                                      const WebKit::WebSize& size);
 639   virtual void reportFindInPageMatchCount(int request_id,
 640                                           int count,
 641                                           bool final_update);
 642   virtual void reportFindInPageSelection(int request_id,
 643                                          int active_match_ordinal,
 644                                          const WebKit::WebRect& sel);
 645   virtual void openFileSystem(WebKit::WebFrame* frame,
 646                               WebKit::WebFileSystemType type,
 647                               long long size,
 648                               bool create,
 649                               WebKit::WebFileSystemCallbacks* callbacks);
 650   virtual void deleteFileSystem(WebKit::WebFrame* frame,
 651                                 WebKit::WebFileSystemType type,
 652                                 WebKit::WebFileSystemCallbacks* callbacks);
 653   virtual void queryStorageUsageAndQuota(
 654       WebKit::WebFrame* frame,
 655       WebKit::WebStorageQuotaType type,
 656       WebKit::WebStorageQuotaCallbacks* callbacks);
 657   virtual void requestStorageQuota(
 658       WebKit::WebFrame* frame,
 659       WebKit::WebStorageQuotaType type,
 660       unsigned long long requested_size,
 661       WebKit::WebStorageQuotaCallbacks* callbacks);
 662   virtual void willOpenSocketStream(
 663       WebKit::WebSocketStreamHandle* handle);
 664   virtual void willStartUsingPeerConnectionHandler(WebKit::WebFrame* frame,
 665       WebKit::WebRTCPeerConnectionHandler* handler) OVERRIDE;
 666   virtual bool willCheckAndDispatchMessageEvent(
 667       WebKit::WebFrame* sourceFrame,
 668       WebKit::WebFrame* targetFrame,
 669       WebKit::WebSecurityOrigin targetOrigin,
 670       WebKit::WebDOMMessageEvent event) OVERRIDE;
 671   virtual WebKit::WebString userAgentOverride(
 672       WebKit::WebFrame* frame,
 673       const WebKit::WebURL& url) OVERRIDE;
 674   virtual WebKit::WebString doNotTrackValue(WebKit::WebFrame* frame) OVERRIDE;
 675   virtual bool allowWebGL(WebKit::WebFrame* frame, bool default_value) OVERRIDE;
 676   virtual void didLoseWebGLContext(
 677       WebKit::WebFrame* frame,
 678       int arb_robustness_status_code) OVERRIDE;
 679
 680   // WebKit::WebPageSerializerClient implementation ----------------------------
 681
 682   virtual void didSerializeDataForFrame(
 683       const WebKit::WebURL& frame_url,
 684       const WebKit::WebCString& data,
 685       PageSerializationStatus status) OVERRIDE;
 686
 687   // RenderView implementation -------------------------------------------------
 688
 689   virtual bool Send(IPC::Message* message) OVERRIDE;
 690   virtual int GetRoutingID() const OVERRIDE;
 691   virtual int GetPageId() const OVERRIDE;
 692   virtual gfx::Size GetSize() const OVERRIDE;
 693   virtual WebPreferences& GetWebkitPreferences() OVERRIDE;
 694   virtual void SetWebkitPreferences(const WebPreferences& preferences) OVERRIDE;
 695   virtual WebKit::WebView* GetWebView() OVERRIDE;
 696   virtual WebKit::WebNode GetFocusedNode() const OVERRIDE;
 697   virtual WebKit::WebNode GetContextMenuNode() const OVERRIDE;
 698   virtual bool IsEditableNode(const WebKit::WebNode& node) const OVERRIDE;
 699   virtual WebKit::WebPlugin* CreatePlugin(
 700       WebKit::WebFrame* frame,
 701       const webkit::WebPluginInfo& info,
 702       const WebKit::WebPluginParams& params) OVERRIDE;
 703   virtual void EvaluateScript(const string16& frame_xpath,
 704                               const string16& jscript,
 705                               int id,
 706                               bool notify_result) OVERRIDE;
 707   virtual bool ShouldDisplayScrollbars(int width, int height) const OVERRIDE;
 708   virtual int GetEnabledBindings() const OVERRIDE;
 709   virtual bool GetContentStateImmediately() const OVERRIDE;
 710   virtual float GetFilteredTimePerFrame() const OVERRIDE;
 711   virtual int ShowContextMenu(ContextMenuClient* client,
 712                               const ContextMenuParams& params) OVERRIDE;
 713   virtual void CancelContextMenu(int request_id) OVERRIDE;
 714   virtual WebKit::WebPageVisibilityState GetVisibilityState() const OVERRIDE;
 715   virtual void RunModalAlertDialog(WebKit::WebFrame* frame,
 716                                    const WebKit::WebString& message) OVERRIDE;
 717   virtual void LoadURLExternally(
 718       WebKit::WebFrame* frame,
 719       const WebKit::WebURLRequest& request,
 720       WebKit::WebNavigationPolicy policy) OVERRIDE;
 721   virtual void Repaint(const gfx::Size& size) OVERRIDE;
 722   virtual void SetEditCommandForNextKeyEvent(const std::string& name,
 723                                              const std::string& value) OVERRIDE;
 724   virtual void ClearEditCommands() OVERRIDE;
 725   virtual SSLStatus GetSSLStatusOfFrame(WebKit::WebFrame* frame) const OVERRIDE;
 726 #if defined(OS_ANDROID)
 727   virtual skia::RefPtr<SkPicture> CapturePicture() OVERRIDE;
 728 #endif
 729
 730   // webkit_glue::WebPluginPageDelegate implementation -------------------------
 731
 732   virtual webkit::npapi::WebPluginDelegate* CreatePluginDelegate(
 733       const base::FilePath& file_path,
 734       const std::string& mime_type) OVERRIDE;
 735   virtual WebKit::WebPlugin* CreatePluginReplacement(
 736       const base::FilePath& file_path) OVERRIDE;
 737   virtual void CreatedPluginWindow(gfx::PluginWindowHandle handle) OVERRIDE;
 738   virtual void WillDestroyPluginWindow(gfx::PluginWindowHandle handle) OVERRIDE;
 739   virtual void DidMovePlugin(
 740       const webkit::npapi::WebPluginGeometry& move) OVERRIDE;
 741   virtual void DidStartLoadingForPlugin() OVERRIDE;
 742   virtual void DidStopLoadingForPlugin() OVERRIDE;
 743   virtual WebKit::WebCookieJar* GetCookieJar() OVERRIDE;
 744
 745   // webkit_media::WebMediaPlayerDelegate implementation -----------------------
 746
 747   virtual void DidPlay(WebKit::WebMediaPlayer* player) OVERRIDE;
 748   virtual void DidPause(WebKit::WebMediaPlayer* player) OVERRIDE;
 749   virtual void PlayerGone(WebKit::WebMediaPlayer* player) OVERRIDE;
 750
 751   // Please do not add your stuff randomly to the end here. If there is an
 752   // appropriate section, add it there. If not, there are some random functions
 753   // nearer to the top you can add it to.
 754
 755   // Cannot use std::set unfortunately since linked_ptr<> does not support
 756   // operator<.
 757   typedef std::vector<linked_ptr<webkit_glue::ImageResourceFetcher> >
 758       ImageResourceFetcherList;
 759
 760  protected:
 761   // RenderWidget overrides:
 762   virtual void Close() OVERRIDE;
 763   virtual void OnResize(const gfx::Size& new_size,
 764                         const gfx::Size& physical_backing_size,
 765                         float overdraw_bottom_height,
 766                         const gfx::Rect& resizer_rect,
 767                         bool is_fullscreen) OVERRIDE;
 768   virtual void WillInitiatePaint() OVERRIDE;
 769   virtual void DidInitiatePaint() OVERRIDE;
 770   virtual void DidFlushPaint() OVERRIDE;
 771   virtual webkit::ppapi::PluginInstance* GetBitmapForOptimizedPluginPaint(
 772       const gfx::Rect& paint_bounds,
 773       TransportDIB** dib,
 774       gfx::Rect* location,
 775       gfx::Rect* clip,
 776       float* scale_factor) OVERRIDE;
 777   virtual gfx::Vector2d GetScrollOffset() OVERRIDE;
 778   virtual void DidHandleKeyEvent() OVERRIDE;
 779   virtual bool WillHandleMouseEvent(
 780       const WebKit::WebMouseEvent& event) OVERRIDE;
 781   virtual bool WillHandleGestureEvent(
 782       const WebKit::WebGestureEvent& event) OVERRIDE;
 783   virtual void DidHandleMouseEvent(const WebKit::WebMouseEvent& event) OVERRIDE;
 784   virtual void DidHandleTouchEvent(const WebKit::WebTouchEvent& event) OVERRIDE;
 785   virtual bool HasTouchEventHandlersAt(const gfx::Point& point) const OVERRIDE;
 786   virtual void OnSetFocus(bool enable) OVERRIDE;
 787   virtual void OnWasHidden() OVERRIDE;
 788   virtual void OnWasShown(bool needs_repainting) OVERRIDE;
 789   virtual GURL GetURLForGraphicsContext3D() OVERRIDE;
 790   virtual bool ForceCompositingModeEnabled() OVERRIDE;
 791   virtual void OnImeSetComposition(
 792       const string16& text,
 793       const std::vector<WebKit::WebCompositionUnderline>& underlines,
 794       int selection_start,
 795       int selection_end) OVERRIDE;
 796   virtual void OnImeConfirmComposition(
 797       const string16& text, const ui::Range& replacement_range) OVERRIDE;
 798   virtual void SetDeviceScaleFactor(float device_scale_factor) OVERRIDE;
 799   virtual ui::TextInputType GetTextInputType() OVERRIDE;
 800   virtual void GetSelectionBounds(gfx::Rect* start, gfx::Rect* end) OVERRIDE;
 801   virtual void GetCompositionCharacterBounds(
 802       std::vector<gfx::Rect>* character_bounds) OVERRIDE;
 803   virtual bool CanComposeInline() OVERRIDE;
 804   virtual void DidCommitCompositorFrame() OVERRIDE;
 805   virtual void InstrumentWillBeginFrame() OVERRIDE;
 806   virtual void InstrumentDidBeginFrame() OVERRIDE;
 807   virtual void InstrumentDidCancelFrame() OVERRIDE;
 808   virtual void InstrumentWillComposite() OVERRIDE;
 809   virtual bool AllowPartialSwap() const OVERRIDE;
 810
 811  protected:
 812   explicit RenderViewImpl(RenderViewImplParams* params);
 813
 814   void Initialize(RenderViewImplParams* params);
 815
 816   // Do not delete directly.  This class is reference counted.
 817   virtual ~RenderViewImpl();
 818
 819  private:
 820   // For unit tests.
 821   friend class ExternalPopupMenuTest;
 822   friend class PepperDeviceTest;
 823   friend class RendererAccessibilityTest;
 824   friend class RenderViewTest;
 825
 826   FRIEND_TEST_ALL_PREFIXES(ExternalPopupMenuRemoveTest, RemoveOnChange);
 827   FRIEND_TEST_ALL_PREFIXES(ExternalPopupMenuTest, NormalCase);
 828   FRIEND_TEST_ALL_PREFIXES(ExternalPopupMenuTest, ShowPopupThenNavigate);
 829   FRIEND_TEST_ALL_PREFIXES(RenderViewImplTest, DecideNavigationPolicyForWebUI);
 830   FRIEND_TEST_ALL_PREFIXES(RenderViewImplTest,
 831                            DidFailProvisionalLoadWithErrorForError);
 832   FRIEND_TEST_ALL_PREFIXES(RenderViewImplTest,
 833                            DidFailProvisionalLoadWithErrorForCancellation);
 834   FRIEND_TEST_ALL_PREFIXES(RenderViewImplTest,
 835                            DontIgnoreBackAfterNavEntryLimit);
 836   FRIEND_TEST_ALL_PREFIXES(RenderViewImplTest, ImeComposition);
 837   FRIEND_TEST_ALL_PREFIXES(RenderViewImplTest, InsertCharacters);
 838   FRIEND_TEST_ALL_PREFIXES(RenderViewImplTest, JSBlockSentAfterPageLoad);
 839   FRIEND_TEST_ALL_PREFIXES(RenderViewImplTest, LastCommittedUpdateState);
 840   FRIEND_TEST_ALL_PREFIXES(RenderViewImplTest, OnExtendSelectionAndDelete);
 841   FRIEND_TEST_ALL_PREFIXES(RenderViewImplTest, OnHandleKeyboardEvent);
 842   FRIEND_TEST_ALL_PREFIXES(RenderViewImplTest, OnImeStateChanged);
 843   FRIEND_TEST_ALL_PREFIXES(RenderViewImplTest, OnNavStateChanged);
 844   FRIEND_TEST_ALL_PREFIXES(RenderViewImplTest, OnSetTextDirection);
 845   FRIEND_TEST_ALL_PREFIXES(RenderViewImplTest, OnUpdateWebPreferences);
 846   FRIEND_TEST_ALL_PREFIXES(RenderViewImplTest, SendSwapOutACK);
 847   FRIEND_TEST_ALL_PREFIXES(RenderViewImplTest, ReloadWhileSwappedOut);
 848   FRIEND_TEST_ALL_PREFIXES(RenderViewImplTest,
 849                            SetEditableSelectionAndComposition);
 850   FRIEND_TEST_ALL_PREFIXES(RenderViewImplTest, StaleNavigationsIgnored);
 851   FRIEND_TEST_ALL_PREFIXES(RenderViewImplTest, UpdateTargetURLWithInvalidURL);
 852   FRIEND_TEST_ALL_PREFIXES(RenderViewImplTest,
 853                            GetCompositionCharacterBoundsTest);
 854   FRIEND_TEST_ALL_PREFIXES(RenderViewImplTest, OnNavigationHttpPost);
 855 #if defined(OS_MACOSX)
 856   FRIEND_TEST_ALL_PREFIXES(RenderViewTest, MacTestCmdUp);
 857 #endif
 858   FRIEND_TEST_ALL_PREFIXES(RenderViewImplTest, SetHistoryLengthAndPrune);
 859   FRIEND_TEST_ALL_PREFIXES(RenderViewImplTest, ZoomLimit);
 860   FRIEND_TEST_ALL_PREFIXES(RenderViewImplTest, NavigateFrame);
 861   FRIEND_TEST_ALL_PREFIXES(RenderViewImplTest,
 862                            ShouldUpdateSelectionTextFromContextMenuParams);
 863
 864   typedef std::map<GURL, double> HostZoomLevels;
 865
 866   enum ErrorPageType {
 867     DNS_ERROR,
 868     HTTP_404,
 869     CONNECTION_ERROR,
 870   };
 871
 872   void UpdateURL(WebKit::WebFrame* frame);
 873   void UpdateTitle(WebKit::WebFrame* frame, const string16& title,
 874                    WebKit::WebTextDirection title_direction);
 875   void UpdateSessionHistory(WebKit::WebFrame* frame);
 876   void SendUpdateState(const WebKit::WebHistoryItem& item);
 877
 878   // Update current main frame's encoding and send it to browser window.
 879   // Since we want to let users see the right encoding info from menu
 880   // before finishing loading, we call the UpdateEncoding in
 881   // a) function:DidCommitLoadForFrame. When this function is called,
 882   // that means we have got first data. In here we try to get encoding
 883   // of page if it has been specified in http header.
 884   // b) function:DidReceiveTitle. When this function is called,
 885   // that means we have got specified title. Because in most of webpages,
 886   // title tags will follow meta tags. In here we try to get encoding of
 887   // page if it has been specified in meta tag.
 888   // c) function:DidFinishDocumentLoadForFrame. When this function is
 889   // called, that means we have got whole html page. In here we should
 890   // finally get right encoding of page.
 891   void UpdateEncoding(WebKit::WebFrame* frame,
 892                       const std::string& encoding_name);
 893
 894   void OpenURL(WebKit::WebFrame* frame,
 895                const GURL& url,
 896                const Referrer& referrer,
 897                WebKit::WebNavigationPolicy policy);
 898
 899   bool RunJavaScriptMessage(JavaScriptMessageType type,
 900                             const string16& message,
 901                             const string16& default_value,
 902                             const GURL& frame_url,
 903                             string16* result);
 904
 905   // Sends a message and runs a nested message loop.
 906   bool SendAndRunNestedMessageLoop(IPC::SyncMessage* message);
 907
 908   // Called when the "pinned to left/right edge" state needs to be updated.
 909   void UpdateScrollState(WebKit::WebFrame* frame);
 910
 911   // IPC message handlers ------------------------------------------------------
 912   //
 913   // The documentation for these functions should be in
 914   // content/common/*_messages.h for the message that the function is handling.
 915
 916   void OnCopy();
 917   void OnCut();
 918   void OnDelete();
 919   void OnExecuteEditCommand(const std::string& name, const std::string& value);
 920   void OnMoveCaret(const gfx::Point& point);
 921   void OnPaste();
 922   void OnPasteAndMatchStyle();
 923   void OnRedo();
 924   void OnReplace(const string16& text);
 925   void OnReplaceMisspelling(const string16& text);
 926   void OnScrollFocusedEditableNodeIntoRect(const gfx::Rect& rect);
 927   void OnSelectAll();
 928   void OnSelectRange(const gfx::Point& start, const gfx::Point& end);
 929   void OnSetEditCommandsForNextKeyEvent(const EditCommands& edit_commands);
 930   void OnUndo();
 931   void OnUnselect();
 932
 933   void OnAllowBindings(int enabled_bindings_flags);
 934   void OnAllowScriptToClose(bool script_can_close);
 935   void OnAsyncFileOpened(base::PlatformFileError error_code,
 936                          IPC::PlatformFileForTransit file_for_transit,
 937                          int message_id);
 938   void OnPpapiBrokerChannelCreated(int request_id,
 939                                    base::ProcessId broker_pid,
 940                                    const IPC::ChannelHandle& handle);
 941   void OnPpapiBrokerPermissionResult(int request_id, bool result);
 942   void OnCancelDownload(int32 download_id);
 943   void OnClearFocusedNode();
 944   void OnClosePage();
 945   void OnContextMenuClosed(const CustomContextMenuContext& custom_context);
 946   void OnShowContextMenu();
 947   void OnCopyImageAt(int x, int y);
 948   void OnCSSInsertRequest(const string16& frame_xpath,
 949                           const std::string& css);
 950   void OnCustomContextMenuAction(const CustomContextMenuContext& custom_context,
 951       unsigned action);
 952   void OnSetName(const std::string& name);
 953   void OnDeterminePageLanguage();
 954   void OnDisableScrollbarsForSmallWindows(
 955       const gfx::Size& disable_scrollbars_size_limit);
 956   void OnDisassociateFromPopupCount();
 957   void OnDragSourceEndedOrMoved(const gfx::Point& client_point,
 958                                 const gfx::Point& screen_point,
 959                                 bool ended,
 960                                 WebKit::WebDragOperation drag_operation);
 961   void OnDragSourceSystemDragEnded();
 962   void OnDragTargetDrop(const gfx::Point& client_pt,
 963                         const gfx::Point& screen_pt,
 964                         int key_modifiers);
 965   void OnDragTargetDragEnter(const WebDropData& drop_data,
 966                              const gfx::Point& client_pt,
 967                              const gfx::Point& screen_pt,
 968                              WebKit::WebDragOperationsMask operations_allowed,
 969                              int key_modifiers);
 970   void OnDragTargetDragLeave();
 971   void OnDragTargetDragOver(const gfx::Point& client_pt,
 972                             const gfx::Point& screen_pt,
 973                             WebKit::WebDragOperationsMask operations_allowed,
 974                             int key_modifiers);
 975   void OnEnablePreferredSizeChangedMode();
 976   void OnEnableAutoResize(const gfx::Size& min_size, const gfx::Size& max_size);
 977   void OnDisableAutoResize(const gfx::Size& new_size);
 978   void OnEnumerateDirectoryResponse(int id,
 979                                     const std::vector<base::FilePath>& paths);
 980   void OnExtendSelectionAndDelete(int before, int after);
 981   void OnFileChooserResponse(
 982       const std::vector<ui::SelectedFileInfo>& files);
 983   void OnFind(int request_id, const string16&, const WebKit::WebFindOptions&);
 984   void OnGetAllSavableResourceLinksForCurrentPage(const GURL& page_url);
 985   void OnGetSerializedHtmlDataForCurrentPageWithLocalLinks(
 986       const std::vector<GURL>& links,
 987       const std::vector<base::FilePath>& local_paths,
 988       const base::FilePath& local_directory_name);
 989   void OnMediaPlayerActionAt(const gfx::Point& location,
 990                              const WebKit::WebMediaPlayerAction& action);
 991
 992   // Screen has rotated. 0 = default (portrait), 90 = one turn right, and so on.
 993   void OnOrientationChangeEvent(int orientation);
 994
 995   void OnPluginActionAt(const gfx::Point& location,
 996                         const WebKit::WebPluginAction& action);
 997   void OnMoveOrResizeStarted();
 998   void OnNavigate(const ViewMsg_Navigate_Params& params);
 999   void OnPostMessageEvent(const ViewMsg_PostMessage_Params& params);
1000   void OnReleaseDisambiguationPopupDIB(TransportDIB::Handle dib_handle);
1001   void OnReloadFrame();
1002   void OnResetPageEncodingToDefault();
1003   void OnScriptEvalRequest(const string16& frame_xpath,
1004                            const string16& jscript,
1005                            int id,
1006                            bool notify_result);
1007   void OnSetAccessibilityMode(AccessibilityMode new_mode);
1008   void OnSetActive(bool active);
1009   void OnSetAltErrorPageURL(const GURL& gurl);
1010   void OnSetBackground(const SkBitmap& background);
1011   void OnSetCompositionFromExistingText(
1012       int start, int end,
1013       const std::vector<WebKit::WebCompositionUnderline>& underlines);
1014   void OnExitFullscreen();
1015   void OnSetEditableSelectionOffsets(int start, int end);
1016   void OnSetHistoryLengthAndPrune(int history_length, int32 minimum_page_id);
1017   void OnSetInitialFocus(bool reverse);
1018   void OnSetPageEncoding(const std::string& encoding_name);
1019   void OnSetRendererPrefs(const RendererPreferences& renderer_prefs);
1020   void OnSetWebUIProperty(const std::string& name, const std::string& value);
1021   void OnSetZoomLevel(double zoom_level);
1022   void OnSetZoomLevelForLoadingURL(const GURL& url, double zoom_level);
1023   void OnShouldClose();
1024   void OnStop();
1025   void OnStopFinding(StopFindAction action);
1026   void OnSwapOut(const ViewMsg_SwapOut_Params& params);
1027   void OnThemeChanged();
1028   void OnUpdateTargetURLAck();
1029   void OnUpdateTimezone();
1030   void OnUpdateWebPreferences(const WebPreferences& prefs);
1031
1032   void OnZoom(PageZoom zoom);
1033   void OnZoomFactor(PageZoom zoom, int zoom_center_x, int zoom_center_y);
1034
1035   void OnEnableViewSourceMode();
1036
1037   void OnJavaBridgeInit();
1038
1039   void OnDisownOpener();
1040
1041 #if defined(OS_ANDROID)
1042   void OnActivateNearestFindResult(int request_id, float x, float y);
1043   void OnFindMatchRects(int current_version);
1044   void OnSelectPopupMenuItems(bool canceled,
1045                               const std::vector<int>& selected_indices);
1046   void OnUndoScrollFocusedEditableNodeIntoRect();
1047   void OnUpdateTopControlsState(bool enable_hiding,
1048                                 bool enable_showing,
1049                                 bool animate);
1050 #elif defined(OS_MACOSX)
1051   void OnCopyToFindPboard();
1052   void OnPluginImeCompositionCompleted(const string16& text, int plugin_id);
1053   void OnSelectPopupMenuItem(int selected_index);
1054   void OnSetInLiveResize(bool in_live_resize);
1055   void OnSetWindowVisibility(bool visible);
1056   void OnWindowFrameChanged(const gfx::Rect& window_frame,
1057                             const gfx::Rect& view_frame);
1058 #endif
1059
1060   void OnWindowSnapshotCompleted(const int snapshot_id,
1061       const gfx::Size& size, const std::vector<unsigned char>& png);
1062
1063
1064   // Adding a new message handler? Please add it in alphabetical order above
1065   // and put it in the same position in the .cc file.
1066
1067   // Misc private functions ----------------------------------------------------
1068   void ZoomFactorHelper(PageZoom zoom, int zoom_center_x, int zoom_center_y,
1069                         float scaling_increment);
1070
1071   void AltErrorPageFinished(WebKit::WebFrame* frame,
1072                             const WebKit::WebURLRequest& original_request,
1073                             const WebKit::WebURLError& original_error,
1074                             const std::string& html);
1075
1076   // Check whether the preferred size has changed.
1077   void CheckPreferredSize();
1078
1079   void EnsureMediaStreamImpl();
1080
1081   // This callback is triggered when DownloadFavicon completes, either
1082   // succesfully or with a failure. See DownloadFavicon for more
1083   // details.
1084   void DidDownloadFavicon(webkit_glue::ImageResourceFetcher* fetcher,
1085                           const SkBitmap& image);
1086
1087   // Requests to download a favicon image. When done, the RenderView is notified
1088   // by way of DidDownloadFavicon. Returns true if the request was successfully
1089   // started, false otherwise. id is used to uniquely identify the request and
1090   // passed back to the DidDownloadFavicon method. If the image has multiple
1091   // frames, the frame whose size is image_size is returned. If the image
1092   // doesn't have a frame at the specified size, the first is returned.
1093   bool DownloadFavicon(int id, const GURL& image_url, int image_size);
1094
1095   GURL GetAlternateErrorPageURL(const GURL& failed_url,
1096                                 ErrorPageType error_type);
1097
1098   // Locates a sub frame with given xpath
1099   WebKit::WebFrame* GetChildFrame(const string16& frame_xpath) const;
1100
1101   // Returns the URL being loaded by the given frame's request.
1102   GURL GetLoadingUrl(WebKit::WebFrame* frame) const;
1103
1104   // Should only be called if this object wraps a PluginDocument.
1105   WebKit::WebPlugin* GetWebPluginFromPluginDocument();
1106
1107   // Returns true if the |params| navigation is to an entry that has been
1108   // cropped due to a recent navigation the browser did not know about.
1109   bool IsBackForwardToStaleEntry(const ViewMsg_Navigate_Params& params,
1110                                  bool is_reload);
1111
1112   bool MaybeLoadAlternateErrorPage(WebKit::WebFrame* frame,
1113                                    const WebKit::WebURLError& error,
1114                                    bool replace);
1115
1116   // Make this RenderView show an empty, unscriptable page.
1117   void NavigateToSwappedOutURL(WebKit::WebFrame* frame);
1118
1119   // If we initiated a navigation, this function will populate |document_state|
1120   // with the navigation information saved in OnNavigate().
1121   void PopulateDocumentStateFromPending(DocumentState* document_state);
1122
1123   // Returns a new NavigationState populated with the navigation information
1124   // saved in OnNavigate().
1125   NavigationState* CreateNavigationStateFromPending();
1126
1127   // Processes the command-line flags --enable-viewport,
1128   // --enable-fixed-layout[=w,h] and --enable-pinch.
1129   void ProcessViewLayoutFlags(const CommandLine& command_line);
1130
1131 #if defined(OS_ANDROID)
1132   // Launch an Android content intent with the given URL.
1133   void LaunchAndroidContentIntent(const GURL& intent_url, size_t request_id);
1134 #endif
1135
1136   // Sends a reply to the current find operation handling if it was a
1137   // synchronous find request.
1138   void SendFindReply(int request_id,
1139                      int match_count,
1140                      int ordinal,
1141                      const WebKit::WebRect& selection_rect,
1142                      bool final_status_update);
1143
1144   // Returns whether |params.selection_text| should be synchronized to the
1145   // browser before bringing up the context menu. Static for testing.
1146   static bool ShouldUpdateSelectionTextFromContextMenuParams(
1147       const string16& selection_text,
1148       size_t selection_text_offset,
1149       const ui::Range& selection_range,
1150       const ContextMenuParams& params);
1151
1152   // Starts nav_state_sync_timer_ if it isn't already running.
1153   void StartNavStateSyncTimerIfNecessary();
1154
1155   // Dispatches the current state of selection on the webpage to the browser if
1156   // it has changed.
1157   // TODO(varunjain): delete this method once we figure out how to keep
1158   // selection handles in sync with the webpage.
1159   void SyncSelectionIfRequired();
1160
1161 #if defined(OS_POSIX) && !defined(OS_MACOSX)
1162   void UpdateFontRenderingFromRendererPrefs();
1163 #else
1164   void UpdateFontRenderingFromRendererPrefs() {}
1165 #endif
1166
1167   // Update the target url and tell the browser that the target URL has changed.
1168   // If |url| is empty, show |fallback_url|.
1169   void UpdateTargetURL(const GURL& url, const GURL& fallback_url);
1170
1171   // Tells the browser what the new list of favicons for the webpage is.
1172   void SendUpdateFaviconURL(const std::vector<FaviconURL>& urls);
1173
1174   // Invoked from DidStopLoading(). Sends the current list of loaded favicons to
1175   // the browser.
1176   void DidStopLoadingIcons();
1177
1178   // Coordinate conversion -----------------------------------------------------
1179
1180   gfx::RectF ClientRectToPhysicalWindowRect(const gfx::RectF& rect) const;
1181
1182   // ---------------------------------------------------------------------------
1183   // ADDING NEW FUNCTIONS? Please keep private functions alphabetized and put
1184   // it in the same order in the .cc file as it was in the header.
1185   // ---------------------------------------------------------------------------
1186
1187   // Settings ------------------------------------------------------------------
1188
1189   WebPreferences webkit_preferences_;
1190   RendererPreferences renderer_preferences_;
1191
1192   HostZoomLevels host_zoom_levels_;
1193
1194   // Whether content state (such as form state, scroll position and page
1195   // contents) should be sent to the browser immediately. This is normally
1196   // false, but set to true by some tests.
1197   bool send_content_state_immediately_;
1198
1199   // Bitwise-ORed set of extra bindings that have been enabled.  See
1200   // BindingsPolicy for details.
1201   int enabled_bindings_;
1202
1203   // The alternate error page URL, if one exists.
1204   GURL alternate_error_page_url_;
1205
1206   // If true, we send IPC messages when |preferred_size_| changes.
1207   bool send_preferred_size_changes_;
1208
1209   // If non-empty, and |send_preferred_size_changes_| is true, disable drawing
1210   // scroll bars on windows smaller than this size.  Used for windows that the
1211   // browser resizes to the size of the content, such as browser action popups.
1212   // If a render view is set to the minimum size of its content, webkit may add
1213   // scroll bars.  This makes sense for fixed sized windows, but it does not
1214   // make sense when the size of the view was chosen to fit the content.
1215   // This setting ensures that no scroll bars are drawn.  The size limit exists
1216   // because if the view grows beyond a size known to the browser, scroll bars
1217   // should be drawn.
1218   gfx::Size disable_scrollbars_size_limit_;
1219
1220   // Loading state -------------------------------------------------------------
1221
1222   // True if the top level frame is currently being loaded.
1223   bool is_loading_;
1224
1225   // The gesture that initiated the current navigation.
1226   NavigationGesture navigation_gesture_;
1227
1228   // Used for popups.
1229   bool opened_by_user_gesture_;
1230
1231   // Whether this RenderView was created by a frame that was suppressing its
1232   // opener. If so, we may want to load pages in a separate process.  See
1233   // decidePolicyForNavigation for details.
1234   bool opener_suppressed_;
1235
1236   // If we are handling a top-level client-side redirect, this tracks the URL
1237   // of the page that initiated it. Specifically, when a load is committed this
1238   // is used to determine if that load originated from a client-side redirect.
1239   // It is empty if there is no top-level client-side redirect.
1240   Referrer completed_client_redirect_src_;
1241
1242   // Holds state pertaining to a navigation that we initiated.  This is held by
1243   // the WebDataSource::ExtraData attribute.  We use pending_navigation_state_
1244   // as a temporary holder for the state until the WebDataSource corresponding
1245   // to the new navigation is created.  See DidCreateDataSource.
1246   scoped_ptr<ViewMsg_Navigate_Params> pending_navigation_params_;
1247
1248   // Timer used to delay the updating of nav state (see SyncNavigationState).
1249   base::OneShotTimer<RenderViewImpl> nav_state_sync_timer_;
1250
1251   // Page IDs ------------------------------------------------------------------
1252   // See documentation in RenderView.
1253   int32 page_id_;
1254
1255   // Indicates the ID of the last page that we sent a FrameNavigate to the
1256   // browser for. This is used to determine if the most recent transition
1257   // generated a history entry (less than page_id_), or not (equal to or
1258   // greater than). Note that this will be greater than page_id_ if the user
1259   // goes back.
1260   int32 last_page_id_sent_to_browser_;
1261
1262   // The next available page ID to use for this RenderView.  These IDs are
1263   // specific to a given RenderView and the frames within it.
1264   int32 next_page_id_;
1265
1266   // The offset of the current item in the history list.
1267   int history_list_offset_;
1268
1269   // The RenderView's current impression of the history length.  This includes
1270   // any items that have committed in this process, but because of cross-process
1271   // navigations, the history may have some entries that were committed in other
1272   // processes.  We won't know about them until the next navigation in this
1273   // process.
1274   int history_list_length_;
1275
1276   // The list of page IDs for each history item this RenderView knows about.
1277   // Some entries may be -1 if they were rendered by other processes or were
1278   // restored from a previous session.  This lets us detect attempts to
1279   // navigate to stale entries that have been cropped from our history.
1280   std::vector<int32> history_page_ids_;
1281
1282   // Page info -----------------------------------------------------------------
1283
1284   // The last gotten main frame's encoding.
1285   std::string last_encoding_name_;
1286
1287   // UI state ------------------------------------------------------------------
1288
1289   // The state of our target_url transmissions. When we receive a request to
1290   // send a URL to the browser, we set this to TARGET_INFLIGHT until an ACK
1291   // comes back - if a new request comes in before the ACK, we store the new
1292   // URL in pending_target_url_ and set the status to TARGET_PENDING. If an
1293   // ACK comes back and we are in TARGET_PENDING, we send the stored URL and
1294   // revert to TARGET_INFLIGHT.
1295   //
1296   // We don't need a queue of URLs to send, as only the latest is useful.
1297   enum {
1298     TARGET_NONE,
1299     TARGET_INFLIGHT,  // We have a request in-flight, waiting for an ACK
1300     TARGET_PENDING    // INFLIGHT + we have a URL waiting to be sent
1301   } target_url_status_;
1302
1303   // The URL we show the user in the status bar. We use this to determine if we
1304   // want to send a new one (we do not need to send duplicates). It will be
1305   // equal to either |mouse_over_url_| or |focus_url_|, depending on which was
1306   // updated last.
1307   GURL target_url_;
1308
1309   // The URL the user's mouse is hovering over.
1310   GURL mouse_over_url_;
1311
1312   // The URL that has keyboard focus.
1313   GURL focus_url_;
1314
1315   // The next target URL we want to send to the browser.
1316   GURL pending_target_url_;
1317
1318   // The text selection the last time DidChangeSelection got called. May contain
1319   // additional characters before and after the selected text, for IMEs. The
1320   // portion of this string that is the actual selected text starts at index
1321   // |selection_range_.GetMin() - selection_text_offset_| and has length
1322   // |selection_range_.length()|.
1323   string16 selection_text_;
1324   // The offset corresponding to the start of |selection_text_| in the document.
1325   size_t selection_text_offset_;
1326   // Range over the document corresponding to the actual selected text (which
1327   // could correspond to a substring of |selection_text_|; see above).
1328   ui::Range selection_range_;
1329
1330   // External context menu requests we're waiting for. "Internal"
1331   // (WebKit-originated) context menu events will have an ID of 0 and will not
1332   // be in this map.
1333   //
1334   // We don't want to add internal ones since some of the "special" page
1335   // handlers in the browser process just ignore the context menu requests so
1336   // avoid showing context menus, and so this will cause right clicks to leak
1337   // entries in this map. Most users of the custom context menu (e.g. Pepper
1338   // plugins) are normally only on "regular" pages and the regular pages will
1339   // always respond properly to the request, so we don't have to worry so
1340   // much about leaks.
1341   IDMap<ContextMenuClient, IDMapExternalPointer> pending_context_menus_;
1342
1343   // View ----------------------------------------------------------------------
1344
1345   // Cache the preferred size of the page in order to prevent sending the IPC
1346   // when layout() recomputes but doesn't actually change sizes.
1347   gfx::Size preferred_size_;
1348
1349   // Used to delay determining the preferred size (to avoid intermediate
1350   // states for the sizes).
1351   base::OneShotTimer<RenderViewImpl> check_preferred_size_timer_;
1352
1353   // These store the "is main frame is scrolled all the way to the left
1354   // or right" state that was last sent to the browser.
1355   bool cached_is_main_frame_pinned_to_left_;
1356   bool cached_is_main_frame_pinned_to_right_;
1357
1358   // These store the "has scrollbars" state last sent to the browser.
1359   bool cached_has_main_frame_horizontal_scrollbar_;
1360   bool cached_has_main_frame_vertical_scrollbar_;
1361
1362   // Helper objects ------------------------------------------------------------
1363
1364   RendererWebCookieJarImpl cookie_jar_;
1365
1366   // The next group of objects all implement RenderViewObserver, so are deleted
1367   // along with the RenderView automatically.  This is why we just store
1368   // weak references.
1369
1370   // Holds a reference to the service which provides desktop notifications.
1371   NotificationProvider* notification_provider_;
1372
1373   // The geolocation dispatcher attached to this view, lazily initialized.
1374   GeolocationDispatcher* geolocation_dispatcher_;
1375
1376   // The speech dispatcher attached to this view, lazily initialized.
1377   InputTagSpeechDispatcher* input_tag_speech_dispatcher_;
1378
1379   // The speech recognition dispatcher attached to this view, lazily
1380   // initialized.
1381   SpeechRecognitionDispatcher* speech_recognition_dispatcher_;
1382
1383   // Device orientation dispatcher attached to this view; lazily initialized.
1384   DeviceOrientationDispatcher* device_orientation_dispatcher_;
1385
1386   // MediaStream dispatcher attached to this view; lazily initialized.
1387   MediaStreamDispatcher* media_stream_dispatcher_;
1388
1389   // BrowserPluginManager attached to this view; lazily initialized.
1390   scoped_refptr<BrowserPluginManager> browser_plugin_manager_;
1391
1392   // MediaStreamImpl attached to this view; lazily initialized.
1393   MediaStreamImpl* media_stream_impl_;
1394
1395   DevToolsAgent* devtools_agent_;
1396
1397   // The current accessibility mode.
1398   AccessibilityMode accessibility_mode_;
1399
1400   // Only valid if |accessibility_mode_| is anything other than
1401   // AccessibilityModeOff.
1402   RendererAccessibility* renderer_accessibility_;
1403
1404   // Java Bridge dispatcher attached to this view; lazily initialized.
1405   JavaBridgeDispatcher* java_bridge_dispatcher_;
1406
1407   // Mouse Lock dispatcher attached to this view.
1408   MouseLockDispatcher* mouse_lock_dispatcher_;
1409
1410 #if defined(OS_ANDROID)
1411   // Android Specific ---------------------------------------------------------
1412
1413   // The background color of the document body element. This is used as the
1414   // default background color for filling the screen areas for which we don't
1415   // have the actual content.
1416   SkColor body_background_color_;
1417
1418   // Expected id of the next content intent launched. Used to prevent scheduled
1419   // intents to be launched if aborted.
1420   size_t expected_content_intent_id_;
1421
1422   // List of click-based content detectors.
1423   typedef std::vector< linked_ptr<ContentDetector> > ContentDetectorList;
1424   ContentDetectorList content_detectors_;
1425
1426   // Proxy class for WebMediaPlayer to communicate with the real media player
1427   // objects in browser process.
1428   WebMediaPlayerProxyImplAndroid* media_player_proxy_;
1429
1430   // The media player manager for managing all the media players on this view.
1431   scoped_ptr<webkit_media::WebMediaPlayerManagerAndroid> media_player_manager_;
1432
1433   // A date/time picker object for date and time related input elements.
1434   scoped_ptr<RendererDateTimePicker> date_time_picker_client_;
1435 #endif
1436
1437   // Plugins -------------------------------------------------------------------
1438
1439   // All the currently active plugin delegates for this RenderView; kept so
1440   // that we can enumerate them to send updates about things like window
1441   // location or tab focus and visibily. These are non-owning references.
1442   std::set<WebPluginDelegateProxy*> plugin_delegates_;
1443
1444 #if defined(OS_WIN)
1445   // The ID of the focused NPAPI plug-in.
1446   int focused_plugin_id_;
1447 #endif
1448
1449   // Misc ----------------------------------------------------------------------
1450
1451   // The current and pending file chooser completion objects. If the queue is
1452   // nonempty, the first item represents the currently running file chooser
1453   // callback, and the remaining elements are the other file chooser completion
1454   // still waiting to be run (in order).
1455   struct PendingFileChooser;
1456   std::deque< linked_ptr<PendingFileChooser> > file_chooser_completions_;
1457
1458   // The current directory enumeration callback
1459   std::map<int, WebKit::WebFileChooserCompletion*> enumeration_completions_;
1460   int enumeration_completion_id_;
1461
1462   // Reports load progress to the browser.
1463   scoped_ptr<LoadProgressTracker> load_progress_tracker_;
1464
1465   // The SessionStorage namespace that we're assigned to has an ID, and that ID
1466   // is passed to us upon creation.  WebKit asks for this ID upon first use and
1467   // uses it whenever asking the browser process to allocate new storage areas.
1468   int64 session_storage_namespace_id_;
1469
1470   // The total number of unrequested popups that exist and can be followed back
1471   // to a common opener. This count is shared among all RenderViews created with
1472   // createView(). All popups are treated as unrequested until specifically
1473   // instructed otherwise by the Browser process.
1474   scoped_refptr<SharedRenderViewCounter> shared_popup_counter_;
1475
1476   // Whether this is a top level window (instead of a popup). Top level windows
1477   // shouldn't count against their own |shared_popup_counter_|.
1478   bool decrement_shared_popup_at_destruction_;
1479
1480   // Stores edit commands associated to the next key event.
1481   // Shall be cleared as soon as the next key event is processed.
1482   EditCommands edit_commands_;
1483
1484   // The external popup for the currently showing select popup.
1485   scoped_ptr<ExternalPopupMenu> external_popup_menu_;
1486
1487   // The node that the context menu was pressed over.
1488   WebKit::WebNode context_menu_node_;
1489
1490   // All the registered observers.  We expect this list to be small, so vector
1491   // is fine.
1492   ObserverList<RenderViewObserver> observers_;
1493
1494   // Used to inform didChangeSelection() when it is called in the context
1495   // of handling a InputMsg_SelectRange IPC.
1496   bool handling_select_range_;
1497
1498   // Wraps the |webwidget_| as a MouseLockDispatcher::LockTarget interface.
1499   scoped_ptr<MouseLockDispatcher::LockTarget> webwidget_mouse_lock_target_;
1500
1501   // State associated with the GetWindowSnapshot function.
1502   int next_snapshot_id_;
1503   typedef std::map<int, WindowSnapshotCallback>
1504       PendingSnapshotMap;
1505   PendingSnapshotMap pending_snapshots_;
1506
1507   // Allows to selectively disable partial buffer swap for this renderer's
1508   // compositor.
1509   bool allow_partial_swap_;
1510
1511   // Allows JS to access DOM automation. The JS object is only exposed when the
1512   // DOM automation bindings are enabled.
1513   scoped_ptr<DomAutomationController> dom_automation_controller_;
1514
1515   // This field stores drag/drop related info for the event that is currently
1516   // being handled. If the current event results in starting a drag/drop
1517   // session, this info is sent to the browser along with other drag/drop info.
1518   DragEventSourceInfo possible_drag_event_info_;
1519
1520   // NOTE: pepper_helper_ should be last member because its constructor calls
1521   // AddObservers method of RenderViewImpl from c-tor.
1522   scoped_ptr<RenderViewPepperHelper> pepper_helper_;
1523
1524   // ---------------------------------------------------------------------------
1525   // ADDING NEW DATA? Please see if it fits appropriately in one of the above
1526   // sections rather than throwing it randomly at the end. If you're adding a
1527   // bunch of stuff, you should probably create a helper class and put your
1528   // data and methods on that to avoid bloating RenderView more.  You can
1529   // use the Observer interface to filter IPC messages and receive frame change
1530   // notifications.
1531   // ---------------------------------------------------------------------------
1532
1533   DISALLOW_COPY_AND_ASSIGN(RenderViewImpl);
1534 };
1535
1536 }  // namespace content
1537
1538 #endif  // CONTENT_RENDERER_RENDER_VIEW_IMPL_H_