cc: Rename VSync to BeginFrame

cc/trees/thread_proxy.h

Index: cc/trees/thread_proxy.h
diff --git a/cc/trees/thread_proxy.h b/cc/trees/thread_proxy.h
index 0360ca60bba1a8597adf211ed298ead9903b08e6..ca9ad6c66a1a323397d2b7b7ed32e22d9e264c43 100644
--- a/cc/trees/thread_proxy.h
+++ b/cc/trees/thread_proxy.h
@@ -65,7 +65,7 @@ class ThreadProxy : public Proxy,
   virtual void OnSwapBuffersCompleteOnImplThread() OVERRIDE;
   virtual void OnVSyncParametersChanged(base::TimeTicks timebase,
                                         base::TimeDelta interval) OVERRIDE;
-  virtual void DidVSync(base::TimeTicks frame_time) OVERRIDE;
+  virtual void DidBeginFrame(base::TimeTicks frame_time) OVERRIDE;
   virtual void OnCanDrawStateChanged(bool can_draw) OVERRIDE;
   virtual void OnHasPendingTreeStateChanged(bool has_pending_tree) OVERRIDE;
   virtual void SetNeedsRedrawOnImplThread() OVERRIDE;
@@ -85,7 +85,7 @@ class ThreadProxy : public Proxy,
   virtual void RenewTreePriority() OVERRIDE;
   virtual void RequestScrollbarAnimationOnImplThread(base::TimeDelta delay)
       OVERRIDE;
-  virtual void DidReceiveLastInputEventForVSync(
+  virtual void DidReceiveLastInputEventForBeginFrame(
       base::TimeTicks frame_time) OVERRIDE;
   virtual void DidActivatePendingTree() OVERRIDE;
 
@@ -249,9 +249,9 @@ class ThreadProxy : public Proxy,
   // thread.
   bool next_frame_is_newly_committed_frame_on_impl_thread_;
 
-  bool render_vsync_enabled_;
-  bool render_vsync_notification_enabled_;
-  bool synchronously_disable_vsync_;
+  bool throttle_frame_production_;
+  bool render_begin_frame_notification_enabled_;
+  bool using_synchronous_renderer_compositor_;
   VSyncClient* vsync_client_;
 
   bool inside_draw_;