[Android] Provide synchronized input flush with BeginFrame

content/browser/renderer_host/render_widget_host_view_android.h

Index: content/browser/renderer_host/render_widget_host_view_android.h
diff --git a/content/browser/renderer_host/render_widget_host_view_android.h b/content/browser/renderer_host/render_widget_host_view_android.h
index f541361088467fa5067fd57032c64572f0e4ce31..451f59671b1486b399f23342338a89ac59c59871 100644
--- a/content/browser/renderer_host/render_widget_host_view_android.h
+++ b/content/browser/renderer_host/render_widget_host_view_android.h
@@ -150,6 +150,7 @@ class RenderWidgetHostViewAndroid
       const WebKit::WebMouseWheelEvent& event) OVERRIDE;
   virtual InputEventAckState FilterInputEvent(
       const WebKit::WebInputEvent& input_event) OVERRIDE;
+  virtual void OnSetNeedsFlushInput() OVERRIDE;
   virtual void GestureEventAck(int gesture_event_type,
                                InputEventAckState ack_result) OVERRIDE;
   virtual void OnAccessibilityEvents(
@@ -256,6 +257,9 @@ class RenderWidgetHostViewAndroid
   void AttachLayers();
   void RemoveLayers();
 
+  void AddBeginFrameSubscriber();
+  void RemoveBeginFrameSubscriber();
+
   void CreateOverscrollEffectIfNecessary();
   void UpdateAnimationSize(const cc::CompositorFrameMetadata& frame_metadata);
   void ScheduleAnimationIfNecessary();
@@ -325,6 +329,8 @@ class RenderWidgetHostViewAndroid
   bool overscroll_effect_enabled_;
   scoped_ptr<OverscrollGlow> overscroll_effect_;
 
+  bool flush_input_requested_;
+
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostViewAndroid);
 };