Making OutputSurface a begin frame source and vsync source.

cc/trees/single_thread_proxy.h

Index: cc/trees/single_thread_proxy.h
diff --git a/cc/trees/single_thread_proxy.h b/cc/trees/single_thread_proxy.h
index b173ffb9d8794ff0271d745a8fb7f07c75ec98be..8feb89ec244e1629efafd19bf924ecb58f7dcc75 100644
--- a/cc/trees/single_thread_proxy.h
+++ b/cc/trees/single_thread_proxy.h
@@ -56,7 +56,6 @@ class CC_EXPORT SingleThreadProxy : public Proxy,
   virtual bool MainFrameWillHappenForTesting() OVERRIDE;
 
   // SchedulerClient implementation
-  virtual BeginFrameSource* GetExternalBeginFrameSource() OVERRIDE;
   virtual void WillBeginImplFrame(const BeginFrameArgs& args) OVERRIDE;
   virtual void ScheduledActionSendBeginMainFrame() OVERRIDE;
   virtual DrawResult ScheduledActionDrawAndSwapIfPossible() OVERRIDE;
@@ -76,8 +75,6 @@ class CC_EXPORT SingleThreadProxy : public Proxy,
   // LayerTreeHostImplClient implementation
   virtual void UpdateRendererCapabilitiesOnImplThread() OVERRIDE;
   virtual void DidLoseOutputSurfaceOnImplThread() OVERRIDE;
-  virtual void CommitVSyncParameters(base::TimeTicks timebase,
-                                     base::TimeDelta interval) OVERRIDE {}
   virtual void SetEstimatedParentDrawTime(base::TimeDelta draw_time) OVERRIDE {}
   virtual void SetMaxSwapsPendingOnImplThread(int max) OVERRIDE {}
   virtual void DidSwapBuffersOnImplThread() OVERRIDE;