Revert of cc: Make scheduling be driven by vsync for android webview.

cc/trees/layer_tree_host_impl.h

Index: cc/trees/layer_tree_host_impl.h
diff --git a/cc/trees/layer_tree_host_impl.h b/cc/trees/layer_tree_host_impl.h
index 6bbc488c18a329aca3fc59cf7bd0cb63be29be46..388de5ea2f57dd127eb260fac06e89b76d6d8614 100644
--- a/cc/trees/layer_tree_host_impl.h
+++ b/cc/trees/layer_tree_host_impl.h
@@ -120,9 +120,6 @@
 
   // Called when page scale animation has completed on the impl thread.
   virtual void DidCompletePageScaleAnimationOnImplThread() = 0;
-
-  // Called when output surface asks for a draw.
-  virtual void OnDrawForOutputSurface() = 0;
 
  protected:
   virtual ~LayerTreeHostImplClient() {}
@@ -298,7 +295,6 @@
   void ReclaimResources(const CompositorFrameAck* ack) override;
   void SetMemoryPolicy(const ManagedMemoryPolicy& policy) override;
   void SetTreeActivationCallback(const base::Closure& callback) override;
-  void OnDraw() override;
 
   // Called from LayerTreeImpl.
   void OnCanDrawStateChangedForTree();