text: // 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.
  
  #ifndef CONTENT_RENDERER_RENDER_VIEW_IMPL_H_
  #define CONTENT_RENDERER_RENDER_VIEW_IMPL_H_
  
  #include <deque>
  #include <map>
  #include <set>
  #include <string>
  #include <vector>
  
  #include "base/basictypes.h"
  #include "base/gtest_prod_util.h"
  #include "base/id_map.h"
  #include "base/memory/linked_ptr.h"
  #include "base/memory/weak_ptr.h"
  #include "base/observer_list.h"
  #include "base/process.h"
  #include "base/timer.h"
  #include "base/values.h"
  #include "build/build_config.h"
  #include "content/common/content_export.h"
  #include "content/common/drag_event_source_info.h"
  #include "content/common/edit_command.h"
  #include "content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.h"
  #include "content/common/navigation_gesture.h"
  #include "content/common/view_message_enums.h"
  #include "content/public/common/javascript_message_type.h"
  #include "content/public/common/page_zoom.h"
  #include "content/public/common/referrer.h"
  #include "content/public/common/renderer_preferences.h"
  #include "content/public/common/stop_find_action.h"
  #include "content/public/renderer/render_view.h"
  #include "content/renderer/mouse_lock_dispatcher.h"
  #include "content/renderer/render_view_pepper_helper.h"
  #include "content/renderer/render_widget.h"
  #include "content/renderer/renderer_webcookiejar_impl.h"
  #include "ipc/ipc_platform_file.h"
  #include "third_party/WebKit/Source/Platform/chromium/public/WebFileSystem.h"
  #include "third_party/WebKit/Source/Platform/chromium/public/WebGraphicsContext3D.h"
  #include "third_party/WebKit/Source/WebKit/chromium/public/WebConsoleMessage.h"
  #include "third_party/WebKit/Source/WebKit/chromium/public/WebFrameClient.h"
  #include "third_party/WebKit/Source/WebKit/chromium/public/WebHistoryItem.h"
  #include "third_party/WebKit/Source/WebKit/chromium/public/WebIconURL.h"
  #include "third_party/WebKit/Source/WebKit/chromium/public/WebInputEvent.h"
  #include "third_party/WebKit/Source/WebKit/chromium/public/WebNavigationType.h"
  #include "third_party/WebKit/Source/WebKit/chromium/public/WebNode.h"
  #include "third_party/WebKit/Source/WebKit/chromium/public/WebPageSerializerClient.h"
  #include "third_party/WebKit/Source/WebKit/chromium/public/WebPageVisibilityState.h"
  #include "third_party/WebKit/Source/WebKit/chromium/public/WebSecurityOrigin.h"
  #include "third_party/WebKit/Source/WebKit/chromium/public/WebViewClient.h"
  #include "ui/surface/transport_dib.h"
  #include "webkit/glue/webpreferences.h"
  #include "webkit/media/webmediaplayer_delegate.h"
  #include "webkit/plugins/npapi/webplugin_page_delegate.h"
  
  #if defined(OS_ANDROID)
  #include "content/renderer/android/content_detector.h"
  #include "third_party/WebKit/Source/WebKit/chromium/public/WebContentDetectionResult.h"
  #endif
  
  #if defined(COMPILER_MSVC)
  // RenderViewImpl is a diamond-shaped hierarchy, with WebWidgetClient at the
  // root. VS warns when we inherit the WebWidgetClient method implementations
  // from RenderWidget.  It's safe to ignore that warning.
  #pragma warning(disable: 4250)
  #endif
  
  class CommandLine;
  class PepperDeviceTest;
  class SkBitmap;
  struct PP_NetAddress_Private;
  struct ViewMsg_Navigate_Params;
  struct ViewMsg_PostMessage_Params;
  struct ViewMsg_StopFinding_Params;
  struct ViewMsg_SwapOut_Params;
  struct WebDropData;
  
  namespace ui {
  struct SelectedFileInfo;
  }  // namespace ui
  
  namespace webkit {
  
  namespace ppapi {
  class PluginInstance;
  }  // namespace ppapi
  
  }  // namespace webkit
  
  namespace webkit_glue {
  class ImageResourceFetcher;
  class ResourceFetcher;
  }
  
  #if defined(OS_ANDROID)
  namespace webkit_media {
  class MediaPlayerBridgeManagerImpl;
  class WebMediaPlayerManagerAndroid;
  }
  #endif
  
  namespace WebKit {
  class WebApplicationCacheHost;
  class WebApplicationCacheHostClient;
  class WebCompositorOutputSurface;
  class WebDOMMessageEvent;
  class WebDataSource;
  class WebDateTimeChooserCompletion;
  class WebDragData;
  class WebGeolocationClient;
  class WebGestureEvent;
  class WebIconURL;
  class WebImage;
  class WebPeerConnection00Handler;
  class WebPeerConnection00HandlerClient;
  class WebMediaPlayer;
  class WebMediaPlayerClient;
  class WebMouseEvent;
  class WebPeerConnectionHandler;
  class WebPeerConnectionHandlerClient;
  class WebSocketStreamHandle;
  class WebSpeechInputController;
  class WebSpeechInputListener;
  class WebSpeechRecognizer;
  class WebStorageNamespace;
  class WebTouchEvent;
  class WebURLRequest;
  class WebUserMediaClient;
  struct WebActiveWheelFlingParameters;
  struct WebDateTimeChooserParams;
  struct WebFileChooserParams;
  struct WebFindOptions;
  struct WebMediaPlayerAction;
  struct WebPluginAction;
  struct WebPoint;
  struct WebWindowFeatures;
  
  #if defined(OS_ANDROID)
  class WebHitTestResult;
  #endif
  }
  
  namespace content {
  class BrowserPluginManager;
  class DeviceOrientationDispatcher;
  class DevToolsAgent;
  class DocumentState;
  class DomAutomationController;
  class ExternalPopupMenu;
  class FaviconHelper;
  class GeolocationDispatcher;
  class InputTagSpeechDispatcher;
  class JavaBridgeDispatcher;
  class LoadProgressTracker;
  class MediaStreamDispatcher;
  class MediaStreamImpl;
  class MouseLockDispatcher;
  class NavigationState;
  class NotificationProvider;
  class RenderViewObserver;
  class RenderViewTest;
  class RendererAccessibility;
  class RendererDateTimePicker;
  class RendererPpapiHost;
  class RendererWebColorChooserImpl;
  class RenderWidgetFullscreenPepper;
  class SpeechRecognitionDispatcher;
  class WebPluginDelegateProxy;
  struct CustomContextMenuContext;
  struct FileChooserParams;
  struct RenderViewImplParams;
  
  #if defined(OS_ANDROID)
  class WebMediaPlayerProxyImplAndroid;
  #endif
  
  // We need to prevent a page from trying to create infinite popups. It is not
  // as simple as keeping a count of the number of immediate children
  // popups. Having an html file that window.open()s itself would create
  // an unlimited chain of RenderViews who only have one RenderView child.
  //
  // Therefore, each new top level RenderView creates a new counter and shares it
  // with all its children and grandchildren popup RenderViewImpls created with
  // createView() to have a sort of global limit for the page so no more than
  // kMaximumNumberOfPopups popups are created.
  //
  // This is a RefCounted holder of an int because I can't say
  // scoped_refptr<int>.
  typedef base::RefCountedData<int> SharedRenderViewCounter;
  
  //
  // RenderView is an object that manages a WebView object, and provides a
  // communication interface with an embedding application process
  //
  class CONTENT_EXPORT RenderViewImpl
      : public RenderWidget,
        NON_EXPORTED_BASE(public WebKit::WebViewClient),
        NON_EXPORTED_BASE(public WebKit::WebFrameClient),
        NON_EXPORTED_BASE(public WebKit::WebPageSerializerClient),
        public RenderView,
        NON_EXPORTED_BASE(public webkit::npapi::WebPluginPageDelegate),
        NON_EXPORTED_BASE(public webkit_media::WebMediaPlayerDelegate),
        NON_EXPORTED_BASE(public WebGraphicsContext3DSwapBuffersClient),
        public base::SupportsWeakPtr<RenderViewImpl> {
   public:
    // Creates a new RenderView. If this is a blocked popup or as a new tab,
    // opener_id is the routing ID of the RenderView responsible for creating this
    // RenderView. |counter| is either a currently initialized counter, or NULL
    // (in which case we treat this RenderView as a top level window).
    static RenderViewImpl* Create(
        int32 opener_id,
        const RendererPreferences& renderer_prefs,
        const webkit_glue::WebPreferences& webkit_prefs,
        SharedRenderViewCounter* counter,
        int32 routing_id,
        int32 surface_id,
        int64 session_storage_namespace_id,
        const string16& frame_name,
        bool is_renderer_created,
        bool swapped_out,
        int32 next_page_id,
        const WebKit::WebScreenInfo& screen_info,
        AccessibilityMode accessibility_mode);
  
    // Used by content_layouttest_support to hook into the creation of
    // RenderViewImpls.
    static void InstallCreateHook(
        RenderViewImpl* (*create_render_view_impl)(RenderViewImplParams*));
  
    // Returns the RenderViewImpl containing the given WebView.
    static RenderViewImpl* FromWebView(WebKit::WebView* webview);
  
    // Returns the RenderViewImpl for the given routing ID.
    static RenderViewImpl* FromRoutingID(int routing_id);
  
    // May return NULL when the view is closing.
    WebKit::WebView* webview() const;
  
    // WebGraphicsContext3DSwapBuffersClient implementation.
  
    // Called by a GraphicsContext associated with this view when swapbuffers
    // is posted, completes or is aborted.
    virtual void OnViewContextSwapBuffersPosted() OVERRIDE;
    virtual void OnViewContextSwapBuffersComplete() OVERRIDE;
    virtual void OnViewContextSwapBuffersAborted() OVERRIDE;
  
    int history_list_offset() const { return history_list_offset_; }
  
    const webkit_glue::WebPreferences& webkit_preferences() const {
      return webkit_preferences_;
    }
  
    bool enable_do_not_track() const {
      return renderer_preferences_.enable_do_not_track;
    }
  
    void set_send_content_state_immediately(bool value) {
      send_content_state_immediately_ = value;
    }
  
    MediaStreamDispatcher* media_stream_dispatcher() {
      return media_stream_dispatcher_;
    }
  
    MouseLockDispatcher* mouse_lock_dispatcher() {
      return mouse_lock_dispatcher_;
    }
  
  #if defined(OS_ANDROID)
    webkit_media::WebMediaPlayerManagerAndroid* media_player_manager() {
      return media_player_manager_.get();
    }
  #endif
  
    // Lazily initialize this view's BrowserPluginManager and return it.
    BrowserPluginManager* browser_plugin_manager();
  
    // Functions to add and remove observers for this object.
    void AddObserver(RenderViewObserver* observer);
    void RemoveObserver(RenderViewObserver* observer);
  
    // Adds the given file chooser request to the file_chooser_completion_ queue
    // (see that var for more) and requests the chooser be displayed if there are
    // no other waiting items in the queue.
    //
    // Returns true if the chooser was successfully scheduled. False means we
    // didn't schedule anything.
    bool ScheduleFileChooser(const FileChooserParams& params,
                             WebKit::WebFileChooserCompletion* completion);
  
    void LoadNavigationErrorPage(
        WebKit::WebFrame* frame,
        const WebKit::WebURLRequest& failed_request,
        const WebKit::WebURLError& error,
        const std::string& html,
        bool replace);
  
    // Plugin-related functions --------------------------------------------------
    // (See also WebPluginPageDelegate implementation.)
  
    // Notification that the given plugin has crashed.
    void PluginCrashed(const base::FilePath& plugin_path,
                       base::ProcessId plugin_pid);
  
    // Creates a fullscreen container for a pepper plugin instance.
    RenderWidgetFullscreenPepper* CreatePepperFullscreenContainer(
        webkit::ppapi::PluginInstance* plugin);
  
    // Informs the render view that a PPAPI plugin has gained or lost focus.
    void PpapiPluginFocusChanged();
  
    // Informs the render view that a PPAPI plugin has changed text input status.
    void PpapiPluginTextInputTypeChanged();
    void PpapiPluginCaretPositionChanged();
  
    // Cancels current composition.
    void PpapiPluginCancelComposition();
  
    // Informs the render view that a PPAPI plugin has changed selection.
    void PpapiPluginSelectionChanged();
  
    // Notification that a PPAPI plugin has been created.
    void PpapiPluginCreated(RendererPpapiHost* host);
  
    // Retrieves the current caret position if a PPAPI plugin has focus.
    bool GetPpapiPluginCaretBounds(gfx::Rect* rect);
  
    // Simulates IME events for testing purpose.
    void SimulateImeSetComposition(
        const string16& text,
        const std::vector<WebKit::WebCompositionUnderline>& underlines,
        int selection_start,
        int selection_end);
    void SimulateImeConfirmComposition(const string16& text,
                                       const ui::Range& replacement_range);
  
  #if defined(OS_MACOSX) || defined(OS_WIN)
    // Informs the render view that the given plugin has gained or lost focus.
    void PluginFocusChanged(bool focused, int plugin_id);
  #endif
  
  #if defined(OS_MACOSX)
    // Starts plugin IME.
    void StartPluginIme();
  
    // Helper routines for accelerated plugin support. Used by the
    // WebPluginDelegateProxy, which has a pointer to the RenderView.
    gfx::PluginWindowHandle AllocateFakePluginWindowHandle(bool opaque,
                                                           bool root);
    void DestroyFakePluginWindowHandle(gfx::PluginWindowHandle window);
    void AcceleratedSurfaceSetIOSurface(gfx::PluginWindowHandle window,
                                        int32 width,
                                        int32 height,
                                        uint64 io_surface_identifier);
    TransportDIB::Handle AcceleratedSurfaceAllocTransportDIB(size_t size);
    void AcceleratedSurfaceFreeTransportDIB(TransportDIB::Id dib_id);
    void AcceleratedSurfaceSetTransportDIB(gfx::PluginWindowHandle window,
                                           int32 width,
                                           int32 height,
                                           TransportDIB::Handle transport_dib);
    void AcceleratedSurfaceBuffersSwapped(gfx::PluginWindowHandle window,
                                          uint64 surface_id);
  #endif
  
    void RegisterPluginDelegate(WebPluginDelegateProxy* delegate);
    void UnregisterPluginDelegate(WebPluginDelegateProxy* delegate);
  
    // Helper function to retrieve information about a plugin for a URL and mime
    // type. Returns false if no plugin was found.
    // |actual_mime_type| is the actual mime type supported by the
    // plugin found that match the URL given (one for each item in
    // |info|).
    bool GetPluginInfo(const GURL& url,
                       const GURL& page_url,
                       const std::string& mime_type,
                       webkit::WebPluginInfo* plugin_info,
                       std::string* actual_mime_type);
  
    void TransferActiveWheelFlingAnimation(
        const WebKit::WebActiveWheelFlingParameters& params);
  
    // Returns true if the focused element is editable text from the perspective
    // of IME support (also used for on-screen keyboard). Works correctly inside
    // supported PPAPI plug-ins.
    bool HasIMETextFocus();
  
    // Callback for use with GetWindowSnapshot.
    typedef base::Callback<void(
        const gfx::Size&, const std::vector<unsigned char>&)>
        WindowSnapshotCallback;
  
    void GetWindowSnapshot(const WindowSnapshotCallback& callback);
  
    // Dispatches the current navigation state to the browser. Called on a
    // periodic timer so we don't send too many messages.
    void SyncNavigationState();
  
    // Returns the length of the session history of this RenderView. Note that
    // this only coincides with the actual length of the session history if this
    // RenderView is the currently active RenderView of a WebContents.
    unsigned GetLocalSessionHistoryLengthForTesting() const;
  
    // Invokes OnSetFocus and marks the widget as active depending on the value
    // of |enable|. This is used for layout tests that need to control the focus
    // synchronously from the renderer.
    void SetFocusAndActivateForTesting(bool enable);
  
    // IPC::Listener implementation ----------------------------------------------
  
    virtual bool OnMessageReceived(const IPC::Message& msg) OVERRIDE;
  
    // WebKit::WebWidgetClient implementation ------------------------------------
  
    // Most methods are handled by RenderWidget.
    virtual void didFocus();
    virtual void didBlur();
    virtual void show(WebKit::WebNavigationPolicy policy);
    virtual void runModal();
    virtual bool enterFullScreen();
    virtual void exitFullScreen();
    virtual bool requestPointerLock();
    virtual void requestPointerUnlock();
    virtual bool isPointerLocked();
    virtual void didActivateCompositor(int input_handler_identifier);
    virtual void didHandleGestureEvent(const WebKit::WebGestureEvent& event,
                                       bool event_cancelled) OVERRIDE;
  
    // WebKit::WebViewClient implementation --------------------------------------
  
    virtual WebKit::WebView* createView(
        WebKit::WebFrame* creator,
        const WebKit::WebURLRequest& request,
        const WebKit::WebWindowFeatures& features,
        const WebKit::WebString& frame_name,
        WebKit::WebNavigationPolicy policy);
    virtual WebKit::WebWidget* createPopupMenu(WebKit::WebPopupType popup_type);
    virtual WebKit::WebExternalPopupMenu* createExternalPopupMenu(
        const WebKit::WebPopupMenuInfo& popup_menu_info,
        WebKit::WebExternalPopupMenuClient* popup_menu_client);
    virtual WebKit::WebStorageNamespace* createSessionStorageNamespace(
        unsigned quota);
    virtual void didAddMessageToConsole(
        const WebKit::WebConsoleMessage& message,
        const WebKit::WebString& source_name,
        unsigned source_line);
    virtual void printPage(WebKit::WebFrame* frame);
    virtual WebKit::WebNotificationPresenter* notificationPresenter();
    virtual bool enumerateChosenDirectory(
        const WebKit::WebString& path,
        WebKit::WebFileChooserCompletion* chooser_completion);
    virtual void initializeHelperPluginWebFrame(WebKit::WebHelperPlugin*);
    virtual void didStartLoading();
    virtual void didStopLoading();
    virtual void didChangeLoadProgress(WebKit::WebFrame* frame,
                                       double load_progress);
    virtual bool isSmartInsertDeleteEnabled();
    virtual bool isSelectTrailingWhitespaceEnabled();
    virtual void didCancelCompositionOnSelectionChange();
    virtual void didChangeSelection(bool is_selection_empty);
    virtual void didExecuteCommand(const WebKit::WebString& command_name);
    virtual bool handleCurrentKeyboardEvent();
    virtual WebKit::WebColorChooser* createColorChooser(
        WebKit::WebColorChooserClient*, const WebKit::WebColor& initial_color);
    virtual bool runFileChooser(
        const WebKit::WebFileChooserParams& params,
        WebKit::WebFileChooserCompletion* chooser_completion);
    virtual void runModalAlertDialog(WebKit::WebFrame* frame,
                                     const WebKit::WebString& message);
    virtual bool runModalConfirmDialog(WebKit::WebFrame* frame,
                                       const WebKit::WebString& message);
    virtual bool runModalPromptDialog(WebKit::WebFrame* frame,
                                      const WebKit::WebString& message,
                                      const WebKit::WebString& default_value,
                                      WebKit::WebString* actual_value);
    virtual bool runModalBeforeUnloadDialog(WebKit::WebFrame* frame,
                                            const WebKit::WebString& message);
    virtual void showContextMenu(WebKit::WebFrame* frame,
                                 const WebKit::WebContextMenuData& data);
    virtual void setStatusText(const WebKit::WebString& text);
    virtual void setMouseOverURL(const WebKit::WebURL& url);
    virtual void setKeyboardFocusURL(const WebKit::WebURL& url);
    virtual void startDragging(WebKit::WebFrame* frame,
                               const WebKit::WebDragData& data,
                               WebKit::WebDragOperationsMask mask,
                               const WebKit::WebImage& image,
                               const WebKit::WebPoint& imageOffset);
    virtual bool acceptsLoadDrops();
    virtual void focusNext();
    virtual void focusPrevious();
    virtual void focusedNodeChanged(const WebKit::WebNode& node);
    virtual void numberOfWheelEventHandlersChanged(unsigned num_handlers);
    virtual void hasTouchEventHandlers(bool has_handlers);
    virtual void didUpdateLayout();
  #if defined(OS_ANDROID)
    virtual bool didTapMultipleTargets(
        const WebKit::WebGestureEvent& event,
        const WebKit::WebVector<WebKit::WebRect>& target_rects);
  #endif
    virtual void navigateBackForwardSoon(int offset);
    virtual int historyBackListCount();
    virtual int historyForwardListCount();
    virtual void postAccessibilityNotification(
        const WebKit::WebAccessibilityObject& obj,
        WebKit::WebAccessibilityNotification notification);
    virtual void didUpdateInspectorSetting(const WebKit::WebString& key,
                                           const WebKit::WebString& value);
    virtual WebKit::WebGeolocationClient* geolocationClient();
    virtual WebKit::WebSpeechInputController* speechInputController(
        WebKit::WebSpeechInputListener* listener);
    virtual WebKit::WebSpeechRecognizer* speechRecognizer();
    virtual WebKit::WebDeviceOrientationClient* deviceOrientationClient();
    virtual void zoomLimitsChanged(double minimum_level, double maximum_level);
    virtual void zoomLevelChanged();
    virtual void registerProtocolHandler(const WebKit::WebString& scheme,
                                         const WebKit::WebString& base_url,
                                         const WebKit::WebString& url,
                                         const WebKit::WebString& title);
    virtual WebKit::WebPageVisibilityState visibilityState() const;
    virtual WebKit::WebUserMediaClient* userMediaClient();
    virtual void draggableRegionsChanged();
  
  #if defined(OS_ANDROID)
    virtual void scheduleContentIntent(const WebKit::WebURL& intent);
    virtual void cancelScheduledContentIntents();
    virtual WebKit::WebContentDetectionResult detectContentAround(
        const WebKit::WebHitTestResult& touch_hit);
  
    // Only used on Android since all other platforms implement
    // date and time input fields using MULTIPLE_FIELDS_UI
    virtual bool openDateTimeChooser(const WebKit::WebDateTimeChooserParams&,
                                     WebKit::WebDateTimeChooserCompletion*);
  #endif
  
    // WebKit::WebFrameClient implementation -------------------------------------
  
    virtual WebKit::WebPlugin* createPlugin(
        WebKit::WebFrame* frame,
        const WebKit::WebPluginParams& params);
    virtual WebKit::WebSharedWorker* createSharedWorker(
        WebKit::WebFrame* frame, const WebKit::WebURL& url,
        const WebKit::WebString& name, unsigned long long documentId);
    virtual WebKit::WebMediaPlayer* createMediaPlayer(
        WebKit::WebFrame* frame,
        const WebKit::WebURL& url,
        WebKit::WebMediaPlayerClient* client);
    virtual WebKit::WebApplicationCacheHost* createApplicationCacheHost(
        WebKit::WebFrame* frame,
        WebKit::WebApplicationCacheHostClient* client);
    virtual WebKit::WebCookieJar* cookieJar(WebKit::WebFrame* frame);
    virtual void didCreateFrame(WebKit::WebFrame* parent,
                                WebKit::WebFrame* child);
    virtual void didDisownOpener(WebKit::WebFrame* frame);
    virtual void frameDetached(WebKit::WebFrame* frame);
    virtual void willClose(WebKit::WebFrame* frame);
    virtual void didChangeName(WebKit::WebFrame* frame,
                               const WebKit::WebString& name);
    virtual void loadURLExternally(WebKit::WebFrame* frame,
                                   const WebKit::WebURLRequest& request,
                                   WebKit::WebNavigationPolicy policy);
    virtual void loadURLExternally(WebKit::WebFrame* frame,
                                   const WebKit::WebURLRequest& request,
                                   WebKit::WebNavigationPolicy policy,
                                   const WebKit::WebString& suggested_name);
    virtual WebKit::WebNavigationPolicy decidePolicyForNavigation(
        WebKit::WebFrame* frame,
        const WebKit::WebURLRequest& request,
        WebKit::WebNavigationType type,
        const WebKit::WebNode&,
        WebKit::WebNavigationPolicy default_policy,
        bool is_redirect);
    virtual bool canHandleRequest(WebKit::WebFrame* frame,
                                  const WebKit::WebURLRequest& request);
    virtual WebKit::WebURLError cannotHandleRequestError(
        WebKit::WebFrame* frame,
        const WebKit::WebURLRequest& request);
    virtual WebKit::WebURLError cancelledError(
        WebKit::WebFrame* frame,
        const WebKit::WebURLRequest& request);
    virtual void unableToImplementPolicyWithError(
        WebKit::WebFrame* frame,
        const WebKit::WebURLError& error);
    virtual void willSendSubmitEvent(WebKit::WebFrame* frame,
                                     const WebKit::WebFormElement& form);
    virtual void willSubmitForm(WebKit::WebFrame* frame,
                                const WebKit::WebFormElement& form);
    virtual void willPerformClientRedirect(WebKit::WebFrame* frame,
                                           const WebKit::WebURL& from,
                                           const WebKit::WebURL& to,
                                           double interval,
                                           double fire_time);
    virtual void didCancelClientRedirect(WebKit::WebFrame* frame);
    virtual void didCompleteClientRedirect(WebKit::WebFrame* frame,
                                           const WebKit::WebURL& from);
    virtual void didCreateDataSource(WebKit::WebFrame* frame,
                                     WebKit::WebDataSource* datasource);
    virtual void didStartProvisionalLoad(WebKit::WebFrame* frame);
    virtual void didReceiveServerRedirectForProvisionalLoad(
        WebKit::WebFrame* frame);
    virtual void didFailProvisionalLoad(WebKit::WebFrame* frame,
                                        const WebKit::WebURLError& error);
    virtual void didReceiveDocumentData(WebKit::WebFrame* frame,
                                        const char* data, size_t length,
                                        bool& prevent_default);
    virtual void didCommitProvisionalLoad(WebKit::WebFrame* frame,
                                          bool is_new_navigation);
    virtual void didClearWindowObject(WebKit::WebFrame* frame);
    virtual void didCreateDocumentElement(WebKit::WebFrame* frame);
    virtual void didReceiveTitle(WebKit::WebFrame* frame,
                                 const WebKit::WebString& title,
                                 WebKit::WebTextDirection direction);
    virtual void didChangeIcon(WebKit::WebFrame*,
                               WebKit::WebIconURL::Type) OVERRIDE;
    virtual void didFinishDocumentLoad(WebKit::WebFrame* frame);
    virtual void didHandleOnloadEvents(WebKit::WebFrame* frame);
    virtual void didFailLoad(WebKit::WebFrame* frame,
                             const WebKit::WebURLError& error);
    virtual void didFinishLoad(WebKit::WebFrame* frame);
    virtual void didNavigateWithinPage(WebKit::WebFrame* frame,
                                       bool is_new_navigation);
    virtual void didUpdateCurrentHistoryItem(WebKit::WebFrame* frame);
    virtual void assignIdentifierToRequest(WebKit::WebFrame* frame,
                                           unsigned identifier,
                                           const WebKit::WebURLRequest& request);
    virtual void willSendRequest(WebKit::WebFrame* frame,
                                 unsigned identifier,
                                 WebKit::WebURLRequest& request,
                                 const WebKit::WebURLResponse& redirect_response);
    virtual void didReceiveResponse(WebKit::WebFrame* frame,
                                    unsigned identifier,
                                    const WebKit::WebURLResponse& response);
    virtual void didFinishResourceLoad(WebKit::WebFrame* frame,
                                       unsigned identifier);
    virtual void didFailResourceLoad(WebKit::WebFrame* frame,
                                     unsigned identifier,
                                     const WebKit::WebURLError& error);
    virtual void didLoadResourceFromMemoryCache(
        WebKit::WebFrame* frame,
        const WebKit::WebURLRequest& request,
        const WebKit::WebURLResponse&);
    virtual void didDisplayInsecureContent(WebKit::WebFrame* frame);
    virtual void didRunInsecureContent(
        WebKit::WebFrame* frame,
        const WebKit::WebSecurityOrigin& origin,
        const WebKit::WebURL& target);
    virtual void didExhaustMemoryAvailableForScript(WebKit::WebFrame* frame);
    virtual void didCreateScriptContext(WebKit::WebFrame* frame,
                                        v8::Handle<v8::Context>,
                                        int extension_group,
                                        int world_id);
    virtual void willReleaseScriptContext(WebKit::WebFrame* frame,
                                          v8::Handle<v8::Context>,
                                          int world_id);
    virtual bool willSetSecurityToken(WebKit::WebFrame* frame,
                                      v8::Handle<v8::Context> context);
    virtual void didChangeScrollOffset(WebKit::WebFrame* frame);
    virtual void willInsertBody(WebKit::WebFrame* frame) OVERRIDE;
  #if defined(OS_ANDROID)
    virtual void didFirstVisuallyNonEmptyLayout(WebKit::WebFrame*) OVERRIDE;
  #endif
    virtual void didChangeContentsSize(WebKit::WebFrame* frame,
                                       const WebKit::WebSize& size);
    virtual void reportFindInPageMatchCount(int request_id,
                                            int count,
                                            bool final_update);
    virtual void reportFindInPageSelection(int request_id,
                                           int active_match_ordinal,
                                           const WebKit::WebRect& sel);
    virtual void openFileSystem(WebKit::WebFrame* frame,
                                WebKit::WebFileSystem::Type type,
                                long long size,
                                bool create,
                                WebKit::WebFileSystemCallbacks* callbacks);
    virtual void deleteFileSystem(WebKit::WebFrame* frame,
                                  WebKit::WebFileSystem::Type type,
                                  WebKit::WebFileSystemCallbacks* callbacks);
    virtual void queryStorageUsageAndQuota(
        WebKit::WebFrame* frame,
        WebKit::WebStorageQuotaType type,
        WebKit::WebStorageQuotaCallbacks* callbacks);
    virtual void requestStorageQuota(
        WebKit::WebFrame* frame,
        WebKit::WebStorageQuotaType type,
        unsigned long long requested_size,
        WebKit::WebStorageQuotaCallbacks* callbacks);
    virtual void willOpenSocketStream(
        WebKit::WebSocketStreamHandle* handle);
    virtual void willStartUsingPeerConnectionHandler(WebKit::WebFrame* frame,
        WebKit::WebRTCPeerConnectionHandler* handler) OVERRIDE;
    virtual bool willCheckAndDispatchMessageEvent(
        WebKit::WebFrame* sourceFrame,
        WebKit::WebFrame* targetFrame,
        WebKit::WebSecurityOrigin targetOrigin,
        WebKit::WebDOMMessageEvent event) OVERRIDE;
    virtual WebKit::WebString userAgentOverride(
        WebKit::WebFrame* frame,
        const WebKit::WebURL& url) OVERRIDE;
    virtual bool allowWebGL(WebKit::WebFrame* frame, bool default_value) OVERRIDE;
    virtual void didLoseWebGLContext(
        WebKit::WebFrame* frame,
        int arb_robustness_status_code) OVERRIDE;
  
    // WebKit::WebPageSerializerClient implementation ----------------------------
  
    virtual void didSerializeDataForFrame(
        const WebKit::WebURL& frame_url,
        const WebKit::WebCString& data,
        PageSerializationStatus status) OVERRIDE;
  
    // RenderView implementation -------------------------------------------------
  
    virtual bool Send(IPC::Message* message) OVERRIDE;
    virtual int GetRoutingID() const OVERRIDE;
    virtual int GetPageId() const OVERRIDE;
    virtual gfx::Size GetSize() const OVERRIDE;
    virtual webkit_glue::WebPreferences& GetWebkitPreferences() OVERRIDE;
    virtual void SetWebkitPreferences(
        const webkit_glue::WebPreferences& preferences) OVERRIDE;
    virtual WebKit::WebView* GetWebView() OVERRIDE;
    virtual WebKit::WebNode GetFocusedNode() const OVERRIDE;
    virtual WebKit::WebNode GetContextMenuNode() const OVERRIDE;
    virtual bool IsEditableNode(const WebKit::WebNode& node) const OVERRIDE;
    virtual WebKit::WebPlugin* CreatePlugin(
        WebKit::WebFrame* frame,
        const webkit::WebPluginInfo& info,
        const WebKit::WebPluginParams& params) OVERRIDE;
    virtual void EvaluateScript(const string16& frame_xpath,
                                const string16& jscript,
                                int id,
                                bool notify_result) OVERRIDE;
    virtual bool ShouldDisplayScrollbars(int width, int height) const OVERRIDE;
    virtual int GetEnabledBindings() const OVERRIDE;
    virtual bool GetContentStateImmediately() const OVERRIDE;
    virtual float GetFilteredTimePerFrame() const OVERRIDE;
    virtual int ShowContextMenu(ContextMenuClient* client,
                                const ContextMenuParams& params) OVERRIDE;
    virtual void CancelContextMenu(int request_id) OVERRIDE;
    virtual WebKit::WebPageVisibilityState GetVisibilityState() const OVERRIDE;
    virtual void RunModalAlertDialog(WebKit::WebFrame* frame,
                                     const WebKit::WebString& message) OVERRIDE;
    virtual void LoadURLExternally(
        WebKit::WebFrame* frame,
        const WebKit::WebURLRequest& request,
        WebKit::WebNavigationPolicy policy) OVERRIDE;
    virtual void Repaint(const gfx::Size& size) OVERRIDE;
    virtual void SetEditCommandForNextKeyEvent(const std::string& name,
                                               const std::string& value) OVERRIDE;
    virtual void ClearEditCommands() OVERRIDE;
    virtual SSLStatus GetSSLStatusOfFrame(WebKit::WebFrame* frame) const OVERRIDE;
  #if defined(OS_ANDROID)
    virtual skia::RefPtr<SkPicture> CapturePicture() OVERRIDE;
  #endif
  
    // webkit_glue::WebPluginPageDelegate implementation -------------------------
  
    virtual webkit::npapi::WebPluginDelegate* CreatePluginDelegate(
        const base::FilePath& file_path,
        const std::string& mime_type) OVERRIDE;
    virtual WebKit::WebPlugin* CreatePluginReplacement(
        const base::FilePath& file_path) OVERRIDE;
    virtual void CreatedPluginWindow(gfx::PluginWindowHandle handle) OVERRIDE;
    virtual void WillDestroyPluginWindow(gfx::PluginWindowHandle handle) OVERRIDE;
    virtual void DidMovePlugin(
        const webkit::npapi::WebPluginGeometry& move) OVERRIDE;
    virtual void DidStartLoadingForPlugin() OVERRIDE;
    virtual void DidStopLoadingForPlugin() OVERRIDE;
    virtual WebKit::WebCookieJar* GetCookieJar() OVERRIDE;
  
    // webkit_media::WebMediaPlayerDelegate implementation -----------------------
  
    virtual void DidPlay(WebKit::WebMediaPlayer* player) OVERRIDE;
    virtual void DidPause(WebKit::WebMediaPlayer* player) OVERRIDE;
    virtual void PlayerGone(WebKit::WebMediaPlayer* player) OVERRIDE;
  
    // Please do not add your stuff randomly to the end here. If there is an
    // appropriate section, add it there. If not, there are some random functions
    // nearer to the top you can add it to.
  
    // Cannot use std::set unfortunately since linked_ptr<> does not support
    // operator<.
    typedef std::vector<linked_ptr<webkit_glue::ImageResourceFetcher> >
        ImageResourceFetcherList;
  
   protected:
    // RenderWidget overrides:
    virtual void Close() OVERRIDE;
    virtual void OnResize(const gfx::Size& new_size,
                          const gfx::Size& physical_backing_size,
                          const gfx::Rect& resizer_rect,
                          bool is_fullscreen) OVERRIDE;
    virtual void WillInitiatePaint() OVERRIDE;
    virtual void DidInitiatePaint() OVERRIDE;
    virtual void DidFlushPaint() OVERRIDE;
    virtual webkit::ppapi::PluginInstance* GetBitmapForOptimizedPluginPaint(
        const gfx::Rect& paint_bounds,
        TransportDIB** dib,
        gfx::Rect* location,
        gfx::Rect* clip,
        float* scale_factor) OVERRIDE;
    virtual gfx::Vector2d GetScrollOffset() OVERRIDE;
    virtual void DidHandleKeyEvent() OVERRIDE;
    virtual bool WillHandleMouseEvent(
        const WebKit::WebMouseEvent& event) OVERRIDE;
    virtual bool WillHandleGestureEvent(
        const WebKit::WebGestureEvent& event) OVERRIDE;
    virtual void DidHandleMouseEvent(const WebKit::WebMouseEvent& event) OVERRIDE;
    virtual void DidHandleTouchEvent(const WebKit::WebTouchEvent& event) OVERRIDE;
    virtual bool HasTouchEventHandlersAt(const gfx::Point& point) const OVERRIDE;
    virtual void OnSetFocus(bool enable) OVERRIDE;
    virtual void OnWasHidden() OVERRIDE;
    virtual void OnWasShown(bool needs_repainting) OVERRIDE;
    virtual bool SupportsAsynchronousSwapBuffers() OVERRIDE;
    virtual bool ForceCompositingModeEnabled() OVERRIDE;
    virtual scoped_ptr<cc::OutputSurface> CreateOutputSurface() OVERRIDE;
    virtual void OnImeSetComposition(
        const string16& text,
        const std::vector<WebKit::WebCompositionUnderline>& underlines,
        int selection_start,
        int selection_end) OVERRIDE;
    virtual void OnImeConfirmComposition(
        const string16& text, const ui::Range& replacement_range) OVERRIDE;
    virtual void SetDeviceScaleFactor(float device_scale_factor) OVERRIDE;
    virtual ui::TextInputType GetTextInputType() OVERRIDE;
    virtual void GetSelectionBounds(gfx::Rect* start, gfx::Rect* end) OVERRIDE;
    virtual void GetCompositionCharacterBounds(
        std::vector<gfx::Rect>* character_bounds) OVERRIDE;
    virtual bool CanComposeInline() OVERRIDE;
    virtual void DidCommitCompositorFrame() OVERRIDE;
    virtual void InstrumentWillBeginFrame() OVERRIDE;
    virtual void InstrumentDidBeginFrame() OVERRIDE;
    virtual void InstrumentDidCancelFrame() OVERRIDE;
    virtual void InstrumentWillComposite() OVERRIDE;
  
   protected:
    explicit RenderViewImpl(RenderViewImplParams* params);
  
    void Initialize(RenderViewImplParams* params);
  
    // Do not delete directly.  This class is reference counted.
    virtual ~RenderViewImpl();
  
   private:
    // For unit tests.
    friend class ExternalPopupMenuTest;
    friend class PepperDeviceTest;
    friend class RendererAccessibilityTest;
    friend class RenderViewTest;
  
    FRIEND_TEST_ALL_PREFIXES(ExternalPopupMenuRemoveTest, RemoveOnChange);
    FRIEND_TEST_ALL_PREFIXES(ExternalPopupMenuTest, NormalCase);
    FRIEND_TEST_ALL_PREFIXES(ExternalPopupMenuTest, ShowPopupThenNavigate);
    FRIEND_TEST_ALL_PREFIXES(RenderViewImplTest, DecideNavigationPolicyForWebUI);
    FRIEND_TEST_ALL_PREFIXES(RenderViewImplTest,
                             DontIgnoreBackAfterNavEntryLimit);
    FRIEND_TEST_ALL_PREFIXES(RenderViewImplTest, ImeComposition);
    FRIEND_TEST_ALL_PREFIXES(RenderViewImplTest, InsertCharacters);
    FRIEND_TEST_ALL_PREFIXES(RenderViewImplTest, JSBlockSentAfterPageLoad);
    FRIEND_TEST_ALL_PREFIXES(RenderViewImplTest, LastCommittedUpdateState);
    FRIEND_TEST_ALL_PREFIXES(RenderViewImplTest, OnExtendSelectionAndDelete);
    FRIEND_TEST_ALL_PREFIXES(RenderViewImplTest, OnHandleKeyboardEvent);
    FRIEND_TEST_ALL_PREFIXES(RenderViewImplTest, OnImeStateChanged);
    FRIEND_TEST_ALL_PREFIXES(RenderViewImplTest, OnNavStateChanged);
    FRIEND_TEST_ALL_PREFIXES(RenderViewImplTest, OnSetTextDirection);
    FRIEND_TEST_ALL_PREFIXES(RenderViewImplTest, OnUpdateWebPreferences);
    FRIEND_TEST_ALL_PREFIXES(RenderViewImplTest, SendSwapOutACK);
    FRIEND_TEST_ALL_PREFIXES(RenderViewImplTest, ReloadWhileSwappedOut);
    FRIEND_TEST_ALL_PREFIXES(RenderViewImplTest,
                             SetEditableSelectionAndComposition);
    FRIEND_TEST_ALL_PREFIXES(RenderViewImplTest, StaleNavigationsIgnored);
    FRIEND_TEST_ALL_PREFIXES(RenderViewImplTest, UpdateTargetURLWithInvalidURL);
    FRIEND_TEST_ALL_PREFIXES(RenderViewImplTest,
                             GetCompositionCharacterBoundsTest);
    FRIEND_TEST_ALL_PREFIXES(RenderViewImplTest, OnNavigationHttpPost);
  #if defined(OS_MACOSX)
    FRIEND_TEST_ALL_PREFIXES(RenderViewTest, MacTestCmdUp);
  #endif
    FRIEND_TEST_ALL_PREFIXES(RenderViewImplTest, SetHistoryLengthAndPrune);
    FRIEND_TEST_ALL_PREFIXES(RenderViewImplTest, ZoomLimit);
    FRIEND_TEST_ALL_PREFIXES(RenderViewImplTest, NavigateFrame);
    FRIEND_TEST_ALL_PREFIXES(RenderViewImplTest,
                             ShouldUpdateSelectionTextFromContextMenuParams);
  
    typedef std::map<GURL, double> HostZoomLevels;
  
    enum ErrorPageType {
      DNS_ERROR,
      HTTP_404,
      CONNECTION_ERROR,
    };
  
    void UpdateURL(WebKit::WebFrame* frame);
    void UpdateTitle(WebKit::WebFrame* frame, const string16& title,
                     WebKit::WebTextDirection title_direction);
    void UpdateSessionHistory(WebKit::WebFrame* frame);
    void SendUpdateState(const WebKit::WebHistoryItem& item);
  
    // Update current main frame's encoding and send it to browser window.
    // Since we want to let users see the right encoding info from menu
    // before finishing loading, we call the UpdateEncoding in
    // a) function:DidCommitLoadForFrame. When this function is called,
    // that means we have got first data. In here we try to get encoding
    // of page if it has been specified in http header.
    // b) function:DidReceiveTitle. When this function is called,
    // that means we have got specified title. Because in most of webpages,
    // title tags will follow meta tags. In here we try to get encoding of
    // page if it has been specified in meta tag.
    // c) function:DidFinishDocumentLoadForFrame. When this function is
    // called, that means we have got whole html page. In here we should
    // finally get right encoding of page.
    void UpdateEncoding(WebKit::WebFrame* frame,
                        const std::string& encoding_name);
  
   public:
    void OpenURL(WebKit::WebFrame* frame,
                 const GURL& url,
                 const Referrer& referrer,
                 WebKit::WebNavigationPolicy policy);
  
    bool RunJavaScriptMessage(JavaScriptMessageType type,
                              const string16& message,
                              const string16& default_value,
                              const GURL& frame_url,
                              string16* result);
  
    // Sends a message and runs a nested message loop.
    bool SendAndRunNestedMessageLoop(IPC::SyncMessage* message);
  
    // Called when the "pinned to left/right edge" state needs to be updated.
    void UpdateScrollState(WebKit::WebFrame* frame);
  
    // IPC message handlers ------------------------------------------------------
    //
    // The documentation for these functions should be in
    // render_messages_internal.h for the message that the function is handling.
  
    void OnAllowBindings(int enabled_bindings_flags);
    void OnAllowScriptToClose(bool script_can_close);
    void OnAsyncFileOpened(base::PlatformFileError error_code,
                           IPC::PlatformFileForTransit file_for_transit,
                           int message_id);
    void OnPpapiBrokerChannelCreated(int request_id,
                                     base::ProcessId broker_pid,
                                     const IPC::ChannelHandle& handle);
    void OnPpapiBrokerPermissionResult(int request_id, bool result);
    void OnCancelDownload(int32 download_id);
    void OnClearFocusedNode();
    void OnClosePage();
    void OnContextMenuClosed(const CustomContextMenuContext& custom_context);
    void OnCopy();
    void OnCopyImageAt(int x, int y);
    void OnCut();
    void OnCSSInsertRequest(const string16& frame_xpath,
                            const std::string& css);
    void OnCustomContextMenuAction(const CustomContextMenuContext& custom_context,
        unsigned action);
    void OnDelete();
    void OnSetName(const std::string& name);
    void OnDeterminePageLanguage();
    void OnDisableScrollbarsForSmallWindows(
        const gfx::Size& disable_scrollbars_size_limit);
    void OnDisassociateFromPopupCount();
    void OnDragSourceEndedOrMoved(const gfx::Point& client_point,
                                  const gfx::Point& screen_point,
                                  bool ended,
                                  WebKit::WebDragOperation drag_operation);
    void OnDragSourceSystemDragEnded();
    void OnDragTargetDrop(const gfx::Point& client_pt,
                          const gfx::Point& screen_pt,
                          int key_modifiers);
    void OnDragTargetDragEnter(const WebDropData& drop_data,
                               const gfx::Point& client_pt,
                               const gfx::Point& screen_pt,
                               WebKit::WebDragOperationsMask operations_allowed,
                               int key_modifiers);
    void OnDragTargetDragLeave();
    void OnDragTargetDragOver(const gfx::Point& client_pt,
                              const gfx::Point& screen_pt,
                              WebKit::WebDragOperationsMask operations_allowed,
                              int key_modifiers);
    void OnEnablePreferredSizeChangedMode();
    void OnEnableAutoResize(const gfx::Size& min_size, const gfx::Size& max_size);
    void OnDisableAutoResize(const gfx::Size& new_size);
    void OnEnumerateDirectoryResponse(int id,
                                      const std::vector<base::FilePath>& paths);
    void OnExecuteEditCommand(const std::string& name, const std::string& value);
    void OnExtendSelectionAndDelete(int before, int after);
    void OnFileChooserResponse(
        const std::vector<ui::SelectedFileInfo>& files);
    void OnFind(int request_id, const string16&, const WebKit::WebFindOptions&);
    void OnGetAllSavableResourceLinksForCurrentPage(const GURL& page_url);
    void OnGetSerializedHtmlDataForCurrentPageWithLocalLinks(
        const std::vector<GURL>& links,
        const std::vector<base::FilePath>& local_paths,
        const base::FilePath& local_directory_name);
    void OnMediaPlayerActionAt(const gfx::Point& location,
                               const WebKit::WebMediaPlayerAction& action);
  
    // Screen has rotated. 0 = default (portrait), 90 = one turn right, and so on.
    void OnOrientationChangeEvent(int orientation);
  
    void OnPluginActionAt(const gfx::Point& location,
                          const WebKit::WebPluginAction& action);
    void OnMoveOrResizeStarted();
    void OnNavigate(const ViewMsg_Navigate_Params& params);
    void OnPaste();
    void OnPasteAndMatchStyle();
    void OnPostMessageEvent(const ViewMsg_PostMessage_Params& params);
    void OnRedo();
    void OnReleaseDisambiguationPopupDIB(TransportDIB::Handle dib_handle);
    void OnReloadFrame();
    void OnReplace(const string16& text);
    void OnReplaceMisspelling(const string16& text);
    void OnResetPageEncodingToDefault();
    void OnScriptEvalRequest(const string16& frame_xpath,
                             const string16& jscript,
                             int id,
                             bool notify_result);
    void OnSelectAll();
    void OnSelectRange(const gfx::Point& start, const gfx::Point& end);
    void OnMoveCaret(const gfx::Point& point);
    void OnSetAccessibilityMode(AccessibilityMode new_mode);
    void OnSetActive(bool active);
    void OnSetAltErrorPageURL(const GURL& gurl);
    void OnSetBackground(const SkBitmap& background);
    void OnSetCompositionFromExistingText(
        int start, int end,
        const std::vector<WebKit::WebCompositionUnderline>& underlines);
    void OnSetEditableSelectionOffsets(int start, int end);
    void OnSetNavigationStartTime(
        const base::TimeTicks& browser_navigation_start);
    void OnSetWebUIProperty(const std::string& name, const std::string& value);
    void OnSetEditCommandsForNextKeyEvent(const EditCommands& edit_commands);
    void OnSetHistoryLengthAndPrune(int history_length, int32 minimum_page_id);
    void OnSetInitialFocus(bool reverse);
    void OnScrollFocusedEditableNodeIntoRect(const gfx::Rect& rect);
    void OnSetPageEncoding(const std::string& encoding_name);
    void OnSetRendererPrefs(const RendererPreferences& renderer_prefs);
    void OnSetZoomLevel(double zoom_level);
    void OnSetZoomLevelForLoadingURL(const GURL& url, double zoom_level);
    void OnExitFullscreen();
    void OnShouldClose();
    void OnStop();
    void OnStopFinding(StopFindAction action);
    void OnSwapOut(const ViewMsg_SwapOut_Params& params);
    void OnThemeChanged();
    void OnUndo();
    void OnUpdateTargetURLAck();
    void OnUpdateTimezone();
    void OnUpdateWebPreferences(const webkit_glue::WebPreferences& prefs);
    void OnUnselect();
  
    void OnZoom(PageZoom zoom);
    void OnZoomFactor(PageZoom zoom, int zoom_center_x, int zoom_center_y);
  
    void OnEnableViewSourceMode();
  
    void OnJavaBridgeInit();
  
    void OnDisownOpener();
    void OnUpdatedFrameTree(int process_id,
                            int route_id,
                            const std::string& frame_tree);
  
  #if defined(OS_ANDROID)
    void OnActivateNearestFindResult(int request_id, float x, float y);
    void OnFindMatchRects(int current_version);
    void OnSelectPopupMenuItems(bool canceled,
                                const std::vector<int>& selected_indices);
    void OnSynchronousFind(int request_id,
                           const string16& search_string,
                           const WebKit::WebFindOptions& options,
                           IPC::Message* reply_msg);
    void OnUndoScrollFocusedEditableNodeIntoRect();
    void OnEnableHidingTopControls(bool enable);
  #elif defined(OS_MACOSX)
    void OnCopyToFindPboard();
    void OnPluginImeCompositionCompleted(const string16& text, int plugin_id);
    void OnSelectPopupMenuItem(int selected_index);
    void OnSetInLiveResize(bool in_live_resize);
    void OnSetWindowVisibility(bool visible);
    void OnWindowFrameChanged(const gfx::Rect& window_frame,
                              const gfx::Rect& view_frame);
  #endif
  
    void OnWindowSnapshotCompleted(const int snapshot_id,
        const gfx::Size& size, const std::vector<unsigned char>& png);
  
  
    // Adding a new message handler? Please add it in alphabetical order above
    // and put it in the same position in the .cc file.
  
    // Misc private functions ----------------------------------------------------
    void ZoomFactorHelper(PageZoom zoom, int zoom_center_x, int zoom_center_y,
                          float scaling_increment);
  
    void AltErrorPageFinished(WebKit::WebFrame* frame,
                              const WebKit::WebURLError& original_error,
                              const std::string& html);
  
    // Check whether the preferred size has changed.
    void CheckPreferredSize();
  
    WebKit::WebGraphicsContext3D* CreateGraphicsContext3D(
        const WebKit::WebGraphicsContext3D::Attributes& attributes);
  
    // This method walks the entire frame tree for this RenderView and sends an
    // update to the browser process as described in the
    // ViewHostMsg_FrameTreeUpdated comments. If |exclude_frame_subtree|
    // frame is non-NULL, the subtree starting at that frame not included in the
    // serialized form.
    // This is used when a frame is going to be removed from the tree.
    void SendUpdatedFrameTree(WebKit::WebFrame* exclude_frame_subtree);
  
    // Recursively creates a DOM frame tree starting with |frame|, based on
    // |frame_tree|. For each node, the frame is navigated to the swapped out URL,
    // the name (if present) is set on it, and all the subframes are created
    // and added to the DOM.
    void CreateFrameTree(WebKit::WebFrame* frame,
                         base::DictionaryValue* frame_tree);
  
    // If this is a swapped out RenderView, which maintains a copy of the frame
    // tree of an active RenderView, we keep a map from frame ids in this view to
    // the frame ids of the active view for each corresponding frame.
    // This method returns the frame in this RenderView that corresponds to the
    // frame in the active RenderView specified by |remote_frame_id|.
    WebKit::WebFrame* GetFrameByRemoteID(int remote_frame_id);
  
    void EnsureMediaStreamImpl();
  
    // This callback is triggered when DownloadFavicon completes, either
    // succesfully or with a failure. See DownloadFavicon for more
    // details.
    void DidDownloadFavicon(webkit_glue::ImageResourceFetcher* fetcher,
                            const SkBitmap& image);
  
    // Requests to download a favicon image. When done, the RenderView is notified
    // by way of DidDownloadFavicon. Returns true if the request was successfully
    // started, false otherwise. id is used to uniquely identify the request and
    // passed back to the DidDownloadFavicon method. If the image has multiple
    // frames, the frame whose size is image_size is returned. If the image
    // doesn't have a frame at the specified size, the first is returned.
    bool DownloadFavicon(int id, const GURL& image_url, int image_size);
  
    // Starts a new find-in-page search or looks for the next match.
    void Find(int request_id,
              const string16& search_text,
              const WebKit::WebFindOptions& options);
  
    GURL GetAlternateErrorPageURL(const GURL& failed_url,
                                  ErrorPageType error_type);
  
    // Locates a sub frame with given xpath
    WebKit::WebFrame* GetChildFrame(const string16& frame_xpath) const;
  
    // Returns the URL being loaded by the given frame's request.
    GURL GetLoadingUrl(WebKit::WebFrame* frame) const;
  
    // Should only be called if this object wraps a PluginDocument.
    WebKit::WebPlugin* GetWebPluginFromPluginDocument();
  
    // Returns true if the |params| navigation is to an entry that has been
    // cropped due to a recent navigation the browser did not know about.
    bool IsBackForwardToStaleEntry(const ViewMsg_Navigate_Params& params,
                                   bool is_reload);
  
    bool MaybeLoadAlternateErrorPage(WebKit::WebFrame* frame,
                                     const WebKit::WebURLError& error,
                                     bool replace);
  
    // Make this RenderView show an empty, unscriptable page.
    void NavigateToSwappedOutURL(WebKit::WebFrame* frame);
  
    // If we initiated a navigation, this function will populate |document_state|
    // with the navigation information saved in OnNavigate().
    void PopulateDocumentStateFromPending(DocumentState* document_state);
  
    // Returns a new NavigationState populated with the navigation information
    // saved in OnNavigate().
    NavigationState* CreateNavigationStateFromPending();
  
    // Processes the command-line flags --enable-viewport and
    // --enable-fixed-layout[=w,h].
    void ProcessViewLayoutFlags(const CommandLine& command_line);
  
    // Processes the command-line flags --enable-pinch and
    // --enable-pinch-in-compositor
    void ProcessAcceleratedPinchZoomFlags(const CommandLine& command_line);
  
  #if defined(OS_ANDROID)
    // Launch an Android content intent with the given URL.
    void LaunchAndroidContentIntent(const GURL& intent_url, size_t request_id);
  #endif
  
    // Sends a reply to the current find operation handling if it was a
    // synchronous find request.
    void SendFindReply(int request_id,
                       int match_count,
                       int ordinal,
                       const WebKit::WebRect& selection_rect,
                       bool final_status_update);
  
    // Returns whether |params.selection_text| should be synchronized to the
    // browser before bringing up the context menu. Static for testing.
    static bool ShouldUpdateSelectionTextFromContextMenuParams(
        const string16& selection_text,
        size_t selection_text_offset,
        const ui::Range& selection_range,
        const ContextMenuParams& params);
  
    // Starts nav_state_sync_timer_ if it isn't already running.
    void StartNavStateSyncTimerIfNecessary();
  
    // Stops the current find-in-page search.
    void StopFinding(StopFindAction action);
  
    // Dispatches the current state of selection on the webpage to the browser if
    // it has changed.
    // TODO(varunjain): delete this method once we figure out how to keep
    // selection handles in sync with the webpage.
    void SyncSelectionIfRequired();
  
  #if defined(OS_POSIX) && !defined(OS_MACOSX)
    void UpdateFontRenderingFromRendererPrefs();
  #else
    void UpdateFontRenderingFromRendererPrefs() {}
  #endif
  
    // Update the target url and tell the browser that the target URL has changed.
    // If |url| is empty, show |fallback_url|.
    void UpdateTargetURL(const GURL& url, const GURL& fallback_url);
  
    // Coordinate conversion -----------------------------------------------------
  
    gfx::RectF ClientRectToPhysicalWindowRect(const gfx::RectF& rect) const;
  
    // ---------------------------------------------------------------------------
    // ADDING NEW FUNCTIONS? Please keep private functions alphabetized and put
    // it in the same order in the .cc file as it was in the header.
    // ---------------------------------------------------------------------------
  
    // Settings ------------------------------------------------------------------
  
    webkit_glue::WebPreferences webkit_preferences_;
    RendererPreferences renderer_preferences_;
  
    HostZoomLevels host_zoom_levels_;
  
    // Whether content state (such as form state, scroll position and page
    // contents) should be sent to the browser immediately. This is normally
    // false, but set to true by some tests.
    bool send_content_state_immediately_;
  
    // Bitwise-ORed set of extra bindings that have been enabled.  See
    // BindingsPolicy for details.
    int enabled_bindings_;
  
    // The alternate error page URL, if one exists.
    GURL alternate_error_page_url_;
  
    // If true, we send IPC messages when |preferred_size_| changes.
    bool send_preferred_size_changes_;
  
    // If non-empty, and |send_preferred_size_changes_| is true, disable drawing
    // scroll bars on windows smaller than this size.  Used for windows that the
    // browser resizes to the size of the content, such as browser action popups.
    // If a render view is set to the minimum size of its content, webkit may add
    // scroll bars.  This makes sense for fixed sized windows, but it does not
    // make sense when the size of the view was chosen to fit the content.
    // This setting ensures that no scroll bars are drawn.  The size limit exists
    // because if the view grows beyond a size known to the browser, scroll bars
    // should be drawn.
    gfx::Size disable_scrollbars_size_limit_;
  
    // Loading state -------------------------------------------------------------
  
    // True if the top level frame is currently being loaded.
    bool is_loading_;
  
    // The gesture that initiated the current navigation.
    NavigationGesture navigation_gesture_;
  
    // Used for popups.
    bool opened_by_user_gesture_;
  
    // Whether this RenderView was created by a frame that was suppressing its
    // opener. If so, we may want to load pages in a separate process.  See
    // decidePolicyForNavigation for details.
    bool opener_suppressed_;
  
    // If we are handling a top-level client-side redirect, this tracks the URL
    // of the page that initiated it. Specifically, when a load is committed this
    // is used to determine if that load originated from a client-side redirect.
    // It is empty if there is no top-level client-side redirect.
    Referrer completed_client_redirect_src_;
  
    // Holds state pertaining to a navigation that we initiated.  This is held by
    // the WebDataSource::ExtraData attribute.  We use pending_navigation_state_
    // as a temporary holder for the state until the WebDataSource corresponding
    // to the new navigation is created.  See DidCreateDataSource.
    scoped_ptr<ViewMsg_Navigate_Params> pending_navigation_params_;
  
    // Timer used to delay the updating of nav state (see SyncNavigationState).
    base::OneShotTimer<RenderViewImpl> nav_state_sync_timer_;
  
    // Page IDs ------------------------------------------------------------------
    // See documentation in RenderView.
    int32 page_id_;
  
    // Indicates the ID of the last page that we sent a FrameNavigate to the
    // browser for. This is used to determine if the most recent transition
    // generated a history entry (less than page_id_), or not (equal to or
    // greater than). Note that this will be greater than page_id_ if the user
    // goes back.
    int32 last_page_id_sent_to_browser_;
  
    // The next available page ID to use for this RenderView.  These IDs are
    // specific to a given RenderView and the frames within it.
    int32 next_page_id_;
  
    // The offset of the current item in the history list.
    int history_list_offset_;
  
    // The RenderView's current impression of the history length.  This includes
    // any items that have committed in this process, but because of cross-process
    // navigations, the history may have some entries that were committed in other
    // processes.  We won't know about them until the next navigation in this
    // process.
    int history_list_length_;
  
    // The list of page IDs for each history item this RenderView knows about.
    // Some entries may be -1 if they were rendered by other processes or were
    // restored from a previous session.  This lets us detect attempts to
    // navigate to stale entries that have been cropped from our history.
    std::vector<int32> history_page_ids_;
  
    // Page info -----------------------------------------------------------------
  
    // The last gotten main frame's encoding.
    std::string last_encoding_name_;
  
    // UI state ------------------------------------------------------------------
  
    // The state of our target_url transmissions. When we receive a request to
    // send a URL to the browser, we set this to TARGET_INFLIGHT until an ACK
    // comes back - if a new request comes in before the ACK, we store the new
    // URL in pending_target_url_ and set the status to TARGET_PENDING. If an
    // ACK comes back and we are in TARGET_PENDING, we send the stored URL and
    // revert to TARGET_INFLIGHT.
    //
    // We don't need a queue of URLs to send, as only the latest is useful.
    enum {
      TARGET_NONE,
      TARGET_INFLIGHT,  // We have a request in-flight, waiting for an ACK
      TARGET_PENDING    // INFLIGHT + we have a URL waiting to be sent
    } target_url_status_;
  
    // The URL we show the user in the status bar. We use this to determine if we
    // want to send a new one (we do not need to send duplicates). It will be
    // equal to either |mouse_over_url_| or |focus_url_|, depending on which was
    // updated last.
    GURL target_url_;
  
    // The URL the user's mouse is hovering over.
    GURL mouse_over_url_;
  
    // The URL that has keyboard focus.
    GURL focus_url_;
  
    // The next target URL we want to send to the browser.
    GURL pending_target_url_;
  
    // The text selection the last time DidChangeSelection got called. May contain
    // additional characters before and after the selected text, for IMEs. The
    // portion of this string that is the actual selected text starts at index
    // |selection_range_.GetMin() - selection_text_offset_| and has length
    // |selection_range_.length()|.
    string16 selection_text_;
    // The offset corresponding to the start of |selection_text_| in the document.
    size_t selection_text_offset_;
    // Range over the document corresponding to the actual selected text (which
    // could correspond to a substring of |selection_text_|; see above).
    ui::Range selection_range_;
  
    // External context menu requests we're waiting for. "Internal"
    // (WebKit-originated) context menu events will have an ID of 0 and will not
    // be in this map.
    //
    // We don't want to add internal ones since some of the "special" page
    // handlers in the browser process just ignore the context menu requests so
    // avoid showing context menus, and so this will cause right clicks to leak
    // entries in this map. Most users of the custom context menu (e.g. Pepper
    // plugins) are normally only on "regular" pages and the regular pages will
    // always respond properly to the request, so we don't have to worry so
    // much about leaks.
    IDMap<ContextMenuClient, IDMapExternalPointer> pending_context_menus_;
  
    // View ----------------------------------------------------------------------
  
    // Cache the preferred size of the page in order to prevent sending the IPC
    // when layout() recomputes but doesn't actually change sizes.
    gfx::Size preferred_size_;
  
    // Used to delay determining the preferred size (to avoid intermediate
    // states for the sizes).
    base::OneShotTimer<RenderViewImpl> check_preferred_size_timer_;
  
    // These store the "is main frame is scrolled all the way to the left
    // or right" state that was last sent to the browser.
    bool cached_is_main_frame_pinned_to_left_;
    bool cached_is_main_frame_pinned_to_right_;
  
    // These store the "has scrollbars" state last sent to the browser.
    bool cached_has_main_frame_horizontal_scrollbar_;
    bool cached_has_main_frame_vertical_scrollbar_;
  
  #if defined(OS_MACOSX)
    // Track the fake plugin window handles allocated on the browser side for
    // the accelerated compositor and (currently) accelerated plugins so that
    // we can discard them when the view goes away.
    std::set<gfx::PluginWindowHandle> fake_plugin_window_handles_;
  #endif
  
    // Helper objects ------------------------------------------------------------
  
    RendererWebCookieJarImpl cookie_jar_;
  
    // The next group of objects all implement RenderViewObserver, so are deleted
    // along with the RenderView automatically.  This is why we just store
    // weak references.
  
    // Holds a reference to the service which provides desktop notifications.
    NotificationProvider* notification_provider_;
  
    // The geolocation dispatcher attached to this view, lazily initialized.
    GeolocationDispatcher* geolocation_dispatcher_;
  
    // The speech dispatcher attached to this view, lazily initialized.
    InputTagSpeechDispatcher* input_tag_speech_dispatcher_;
  
    // The speech recognition dispatcher attached to this view, lazily
    // initialized.
    SpeechRecognitionDispatcher* speech_recognition_dispatcher_;
  
    // Device orientation dispatcher attached to this view; lazily initialized.
    DeviceOrientationDispatcher* device_orientation_dispatcher_;
  
    // MediaStream dispatcher attached to this view; lazily initialized.
    MediaStreamDispatcher* media_stream_dispatcher_;
  
    // BrowserPluginManager attached to this view; lazily initialized.
    scoped_refptr<BrowserPluginManager> browser_plugin_manager_;
  
    // MediaStreamImpl attached to this view; lazily initialized.
    MediaStreamImpl* media_stream_impl_;
  
    DevToolsAgent* devtools_agent_;
  
    // The current accessibility mode.
    AccessibilityMode accessibility_mode_;
  
    // Only valid if |accessibility_mode_| is anything other than
    // AccessibilityModeOff.
    RendererAccessibility* renderer_accessibility_;
  
    // Java Bridge dispatcher attached to this view; lazily initialized.
    JavaBridgeDispatcher* java_bridge_dispatcher_;
  
    // Mouse Lock dispatcher attached to this view.
    MouseLockDispatcher* mouse_lock_dispatcher_;
  
    // Helper class to handle favicon changes.
    FaviconHelper* favicon_helper_;
  
  #if defined(OS_ANDROID)
    // Android Specific ---------------------------------------------------------
  
    // The background color of the document body element. This is used as the
    // default background color for filling the screen areas for which we don't
    // have the actual content.
    SkColor body_background_color_;
  
    // True if SendUpdateFrameInfo is pending.
    bool update_frame_info_scheduled_;
  
    // Expected id of the next content intent launched. Used to prevent scheduled
    // intents to be launched if aborted.
    size_t expected_content_intent_id_;
  
    // List of click-based content detectors.
    typedef std::vector< linked_ptr<ContentDetector> > ContentDetectorList;
    ContentDetectorList content_detectors_;
  
    // Proxy class for WebMediaPlayer to communicate with the real media player
    // objects in browser process.
    WebMediaPlayerProxyImplAndroid* media_player_proxy_;
  
    // The media player manager for managing all the media players on this view.
    scoped_ptr<webkit_media::WebMediaPlayerManagerAndroid> media_player_manager_;
  
    // Resource manager for all the android media player objects if they are
    // created in the renderer process.
    scoped_ptr<webkit_media::MediaPlayerBridgeManagerImpl> media_bridge_manager_;
  
    // Holds the message used to return find results to the browser during
    // synchronous find-in-page requests. Only non-null during these requests.
    scoped_ptr<IPC::Message> synchronous_find_reply_message_;
  
    // The active find-in-page match ordinal during synchronous requests.
    // Needed to be remembered across WebKit callbacks.
    int synchronous_find_active_match_ordinal_;
  
    // A date/time picker object for date and time related input elements.
    scoped_ptr<RendererDateTimePicker> date_time_picker_client_;
  #endif
  
    // Misc ----------------------------------------------------------------------
  
    // The current and pending file chooser completion objects. If the queue is
    // nonempty, the first item represents the currently running file chooser
    // callback, and the remaining elements are the other file chooser completion
    // still waiting to be run (in order).
    struct PendingFileChooser;
    std::deque< linked_ptr<PendingFileChooser> > file_chooser_completions_;
  
    // The current directory enumeration callback
    std::map<int, WebKit::WebFileChooserCompletion*> enumeration_completions_;
    int enumeration_completion_id_;
  
    // Reports load progress to the browser.
    scoped_ptr<LoadProgressTracker> load_progress_tracker_;
  
    // The SessionStorage namespace that we're assigned to has an ID, and that ID
    // is passed to us upon creation.  WebKit asks for this ID upon first use and
    // uses it whenever asking the browser process to allocate new storage areas.
    int64 session_storage_namespace_id_;
  
    // The total number of unrequested popups that exist and can be followed back
    // to a common opener. This count is shared among all RenderViews created with
    // createView(). All popups are treated as unrequested until specifically
    // instructed otherwise by the Browser process.
    scoped_refptr<SharedRenderViewCounter> shared_popup_counter_;
  
    // Whether this is a top level window (instead of a popup). Top level windows
    // shouldn't count against their own |shared_popup_counter_|.
    bool decrement_shared_popup_at_destruction_;
  
    // Stores edit commands associated to the next key event.
    // Shall be cleared as soon as the next key event is processed.
    EditCommands edit_commands_;
  
    // The external popup for the currently showing select popup.
    scoped_ptr<ExternalPopupMenu> external_popup_menu_;
  
    // The node that the context menu was pressed over.
    WebKit::WebNode context_menu_node_;
  
    // All the registered observers.  We expect this list to be small, so vector
    // is fine.
    ObserverList<RenderViewObserver> observers_;
  
    // Used to inform didChangeSelection() when it is called in the context
    // of handling a ViewMsg_SelectRange IPC.
    bool handling_select_range_;
  
    // Wraps the |webwidget_| as a MouseLockDispatcher::LockTarget interface.
    scoped_ptr<MouseLockDispatcher::LockTarget> webwidget_mouse_lock_target_;
  
    // State associated with the GetWindowSnapshot function.
    int next_snapshot_id_;
    typedef std::map<int, WindowSnapshotCallback>
        PendingSnapshotMap;
    PendingSnapshotMap pending_snapshots_;
  
    // Plugins -------------------------------------------------------------------
  
    // All the currently active plugin delegates for this RenderView; kept so
    // that we can enumerate them to send updates about things like window
    // location or tab focus and visibily. These are non-owning references.
    std::set<WebPluginDelegateProxy*> plugin_delegates_;
  
  #if defined(OS_WIN)
    // The ID of the focused NPAPI plug-in.
    int focused_plugin_id_;
  #endif
  
    // Allows JS to access DOM automation. The JS object is only exposed when the
    // DOM automation bindings are enabled.
    scoped_ptr<DomAutomationController> dom_automation_controller_;
  
    // Boolean indicating whether we are in the process of creating the frame
    // tree for this renderer in response to ViewMsg_UpdateFrameTree.  If true,
    // we won't be sending ViewHostMsg_FrameTreeUpdated messages back to the
    // browser, as those will be redundant.
    bool updating_frame_tree_;
  
    // Boolean indicating that the frame tree has changed, but a message has not
    // been sent to the browser because a page has been loading. This helps
    // avoid extra messages being sent to the browser when navigating away from a
    // page with subframes, which will be destroyed. Instead, a single message
    // is sent when the load is stopped with the final state of the frame tree.
    //
    // TODO(nasko): Relying on the is_loading_ means that frame tree updates will
    // not be sent until *all* subframes have completed loading. This can cause
    // JavaScript calls to fail, if they occur prior to the first update message
    // being sent. This will be fixed by bug http://crbug.com/145014.
    bool pending_frame_tree_update_;
  
    // If this render view is a swapped out "mirror" of an active render view in a
    // different process, we record the process id and route id for the active RV.
    // For further details, see the comments on ViewHostMsg_FrameTreeUpdated.
    int target_process_id_;
    int target_routing_id_;
  
    // A map of the current process's frame ids to ids in the remote active render
    // view, if this is a swapped out render view.
    std::map<int, int> active_frame_id_map_;
  
    // This field stores drag/drop related info for the event that is currently
    // being handled. If the current event results in starting a drag/drop
    // session, this info is sent to the browser along with other drag/drop info.
    DragEventSourceInfo possible_drag_event_info_;
  
    // NOTE: pepper_helper_ should be last member because its constructor calls
    // AddObservers method of RenderViewImpl from c-tor.
    scoped_ptr<RenderViewPepperHelper> pepper_helper_;
  
    // ---------------------------------------------------------------------------
    // ADDING NEW DATA? Please see if it fits appropriately in one of the above
    // sections rather than throwing it randomly at the end. If you're adding a
    // bunch of stuff, you should probably create a helper class and put your
    // data and methods on that to avoid bloating RenderView more.  You can
    // use the Observer interface to filter IPC messages and receive frame change
    // notifications.
    // ---------------------------------------------------------------------------
  
    DISALLOW_COPY_AND_ASSIGN(RenderViewImpl);
  };
  
  }  // namespace content
  
  #endif  // CONTENT_RENDERER_RENDER_VIEW_IMPL_H_
  