Add BeginFrameObserverProxy

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 d3e72e276c095cad708097abc5a6c84aad00f730..f03ff28e9e48ae374a414b8af1e222e4d97a7686 100644
--- a/content/browser/renderer_host/render_widget_host_view_aura.h
+++ b/content/browser/renderer_host/render_widget_host_view_aura.h
@@ -472,6 +472,8 @@ class CONTENT_EXPORT RenderWidgetHostViewAura
   void DelegatedFrameHostUpdateVSyncParameters(
       const base::TimeTicks& timebase,
       const base::TimeDelta& interval) override;
+  void DelegatedFrameHostSendBeginFrame(
+      const cc::BeginFrameArgs& args) override;
 
   // Detaches |this| from the input method object.
   void DetachFromInputMethod();
@@ -494,6 +496,9 @@ class CONTENT_EXPORT RenderWidgetHostViewAura
   // Helper function to set keyboard focus to the main window.
   void SetKeyboardFocus();
 
+  // Called when RenderWidget want to start BeginFrame scheduling or stop.
+  void OnSetNeedsBeginFrames(bool needs_begin_frames);
+
   RenderFrameHostImpl* GetFocusedFrame();
 
   // The model object.