Make RenderWidgetHostViewAura::CopyFromCompositingSurface readback layer

content/browser/renderer_host/render_widget_host_view_base.h

 // 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_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_BASE_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_BASE_H_
 
 #if defined(OS_MACOSX)
 #include <OpenGL/OpenGL.h>
 #endif
@@ skipping 61 matching lines @@
       bool scroll_down, int pixels_to_scroll, int mouse_event_x,
       int mouse_event_y) OVERRIDE;
   virtual bool CanSubscribeFrame() const OVERRIDE;
   virtual void BeginFrameSubscription(
       scoped_ptr<RenderWidgetHostViewFrameSubscriber> subscriber) OVERRIDE;
   virtual void EndFrameSubscription() OVERRIDE;
   virtual void OnSwapCompositorFrame(
       scoped_ptr<cc::CompositorFrame> frame) OVERRIDE {}
   virtual void OnOverscrolled(gfx::Vector2dF accumulated_overscroll,
                               gfx::Vector2dF current_fling_velocity) OVERRIDE;
+  virtual uint32 RendererFrameNumber() OVERRIDE;
+  virtual void DidReceiveRendererFrame() OVERRIDE;
 
   void SetBrowserAccessibilityManager(BrowserAccessibilityManager* manager);
 
   // Notification that a resize or move session ended on the native widget.
   void UpdateScreenInfo(gfx::NativeView view);
 
 #if defined(OS_WIN)
   // The callback that DetachPluginsHelper calls for each child window. Call
   // this directly if you want to do custom filtering on plugin windows first.
   static void DetachPluginWindowsCallback(HWND window);
@@ skipping 49 matching lines @@
 protected:
   // The scale factor of the display the renderer is currently on.
   float current_device_scale_factor_;
 
  private:
   // Manager of the tree representation of the WebKit render tree.
   scoped_ptr<BrowserAccessibilityManager> browser_accessibility_manager_;
 
   gfx::Rect current_display_area_;
 
+  uint32 renderer_frame_number_;
+
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostViewBase);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_BASE_H_