cc: Rename VSync to BeginFrame

cc/trees/layer_tree_host.h

 // Copyright 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CC_TREES_LAYER_TREE_HOST_H_
 #define CC_TREES_LAYER_TREE_HOST_H_
 
 #include <limits>
 #include <vector>
 
@@ skipping 81 matching lines @@
 
   // Returns true if any LayerTreeHost is alive.
   static bool AnyLayerTreeHostInstanceExists();
 
   void set_needs_filter_context() { needs_filter_context_ = true; }
   bool needs_offscreen_context() const {
     return needs_filter_context_ || settings_.accelerate_painting;
   }
 
   // LayerTreeHost interface to Proxy.
-  void WillBeginFrame() { client_->WillBeginFrame(); }
-  void DidBeginFrame();
+  void WillBeginMainFrame() { client_->WillBeginMainFrame(); }
+  void DidBeginMainFrame();
   void UpdateClientAnimations(base::TimeTicks monotonic_frame_begin_time);
   void AnimateLayers(base::TimeTicks monotonic_frame_begin_time);
   void DidStopFlinging();
   void Layout();
   void BeginCommitOnImplThread(LayerTreeHostImpl* host_impl);
   void FinishCommitOnImplThread(LayerTreeHostImpl* host_impl);
   gfx::Size PinchZoomScrollbarSize(
       WebKit::WebScrollbar::Orientation orientation) const;
   void SetPinchZoomScrollbarsBoundsAndPosition();
   void CreateAndAddPinchZoomScrollbars();
@@ skipping 230 matching lines @@
   bool in_paint_layer_contents_;
 
   LatencyInfo latency_info_;
 
   DISALLOW_COPY_AND_ASSIGN(LayerTreeHost);
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_LAYER_TREE_HOST_H_