Making OutputSurface a begin frame source and vsync source.

cc/surfaces/display.h

Index: cc/surfaces/display.h
diff --git a/cc/surfaces/display.h b/cc/surfaces/display.h
index 07e87adc1c9b8879dc0d7065fc7a995ba1d75056..e77bc288ad9f70631520aab0d497e5a67af44195 100644
--- a/cc/surfaces/display.h
+++ b/cc/surfaces/display.h
@@ -51,10 +51,7 @@ class CC_SURFACES_EXPORT Display : public OutputSurfaceClient,
   // OutputSurfaceClient implementation.
   virtual void DeferredInitialize() OVERRIDE {}
   virtual void ReleaseGL() OVERRIDE {}
-  virtual void CommitVSyncParameters(base::TimeTicks timebase,
-                                     base::TimeDelta interval) OVERRIDE {}
   virtual void SetNeedsRedrawRect(const gfx::Rect& damage_rect) OVERRIDE {}
-  virtual void BeginFrame(const BeginFrameArgs& args) OVERRIDE {}
   virtual void DidSwapBuffers() OVERRIDE {}
   virtual void DidSwapBuffersComplete() OVERRIDE {}
   virtual void ReclaimResources(const CompositorFrameAck* ack) OVERRIDE {}