cc: Save correct frame begin time to FrameRateCounter

cc/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_LAYER_TREE_HOST_H_
 #define CC_LAYER_TREE_HOST_H_
 
 #include <limits>
 
 #include "base/basictypes.h"
@@ skipping 106 matching lines @@
   void DidCompleteSwapBuffers() { client_->didCompleteSwapBuffers(); }
   void DeleteContentsTexturesOnImplThread(ResourceProvider* resource_provider);
   virtual void AcquireLayerTextures();
   // Returns false if we should abort this frame due to initialization failure.
   bool InitializeRendererIfNeeded();
   void UpdateLayers(ResourceUpdateQueue* queue,
                     size_t contents_memory_limit_bytes);
 
   LayerTreeHostClient* client() { return client_; }
 
-  void Composite();
+  void Composite(base::TimeTicks frame_begin_time);
 
   // Only used when compositing on the main thread.
   void ScheduleComposite();
 
   // Composites and attempts to read back the result into the provided
   // buffer. If it wasn't possible, e.g. due to context lost, will return
   // false.
   bool CompositeAndReadback(void* pixels, gfx::Rect rect_in_device_viewport);
 
   void FinishAllRendering();
@@ skipping 172 matching lines @@
   size_t partial_texture_update_requests_;
 
   scoped_ptr<AnimationRegistrar> animation_registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(LayerTreeHost);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYER_TREE_HOST_H_