Add hooks for flushing input from BeginFrame dispatch on Aura

content/browser/renderer_host/render_widget_host_view_aura.h

Index: content/browser/renderer_host/render_widget_host_view_aura.h
diff --git a/content/browser/renderer_host/render_widget_host_view_aura.h b/content/browser/renderer_host/render_widget_host_view_aura.h
index 8cc79db39a8abb151a449118c32c96237cb04cce..b4c642465e5ed2eae8068756a7293eb6ad5af292 100644
--- a/content/browser/renderer_host/render_widget_host_view_aura.h
+++ b/content/browser/renderer_host/render_widget_host_view_aura.h
@@ -171,6 +171,7 @@ class CONTENT_EXPORT RenderWidgetHostViewAura
   scoped_ptr<SyntheticGestureTarget> CreateSyntheticGestureTarget() override;
   InputEventAckState FilterInputEvent(
       const blink::WebInputEvent& input_event) override;
+  void OnSetNeedsFlushInput() override;
   BrowserAccessibilityManager* CreateBrowserAccessibilityManager(
       BrowserAccessibilityDelegate* delegate) override;
   gfx::AcceleratedWidget AccessibilityGetAcceleratedWidget() override;
@@ -470,6 +471,12 @@ class CONTENT_EXPORT RenderWidgetHostViewAura
   // Called when RenderWidget wants to start BeginFrame scheduling or stop.
   void OnSetNeedsBeginFrames(bool needs_begin_frames);
 
+  enum VSyncRequestType {
+    FLUSH_INPUT = 1 << 0,
+    PERSISTENT_BEGIN_FRAME = 1 << 1
+  };
+  void RequestVSyncUpdate(uint32 requests);
+
   RenderFrameHostImpl* GetFocusedFrame();
 
   // Returns true if the |event| passed in can be forwarded to the renderer.
@@ -659,7 +666,8 @@ class CONTENT_EXPORT RenderWidgetHostViewAura
   // compositing surface and showing the disambiguation popup.
   gfx::Vector2dF disambiguation_scroll_offset_;
 
-  BeginFrameObserverProxy begin_frame_observer_proxy_;
+  // Valid only when thekEnableBeginFrameScheduling
+  scoped_ptr<BeginFrameObserverProxy> begin_frame_observer_proxy_;
 
   // This flag when set ensures that we send over a notification to blink that
   // the current view has focus. Defaults to false.