Refactoring the way begin frame sources inside scheduler work.

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 af40df3824f984fbdfd1cb4c7661929ac1fe5bd6..ca71ac1c7cc3f20e3814bda3f19c9a14683004fd 100644
--- a/cc/trees/single_thread_proxy.h
+++ b/cc/trees/single_thread_proxy.h
@@ -55,13 +55,11 @@ class SingleThreadProxy : public Proxy, LayerTreeHostImplClient {
   // 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;
   virtual void DidSwapBuffersCompleteOnImplThread() OVERRIDE;
-  virtual void BeginFrame(const BeginFrameArgs& args) OVERRIDE {}
+  // FIXME(mithro): Why is this an empty???

[brianderson, 2014/05/07 18:09:59]

@enne is working on a patch to make SingleThreadProxy a SchedulerClient. Right
now drawing is completely main thread triggered.

[mithro-old, 2014/05/07 22:02:32]

I'll have to figure out how this interacts with this change.

   virtual void OnCanDrawStateChanged(bool can_draw) OVERRIDE;
   virtual void NotifyReadyToActivate() OVERRIDE;
   virtual void SetNeedsRedrawOnImplThread() OVERRIDE;
@@ -105,7 +103,6 @@ class SingleThreadProxy : public Proxy, LayerTreeHostImplClient {
   void DidSwapFrame();
 
   bool ShouldComposite() const;
-  void UpdateBackgroundAnimateTicking();
 
   // Accessed on main thread only.
   LayerTreeHost* layer_tree_host_;