Rename Animate as Begin(Main)Frame

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 7392d4f9c27003a8508e6a862f5c552c8feea2e9..a17faa8a4ee914e9012823cf2ed9fd3cadc79696 100644
--- a/cc/trees/layer_tree_host_impl.h
+++ b/cc/trees/layer_tree_host_impl.h
@@ -425,9 +425,9 @@ class CC_EXPORT LayerTreeHostImpl
 
   void SetTreePriority(TreePriority priority);
 
-  void UpdateCurrentFrameTime();
-  void ResetCurrentFrameTimeForNextFrame();
-  virtual base::TimeTicks CurrentFrameTimeTicks();
+  void UpdateCurrentBeginFrameArgs(const BeginFrameArgs& args);
+  void ResetCurrentBeginFrameArgsForNextFrame();
+  virtual BeginFrameArgs CurrentBeginFrameArgs() const;
 
   // Expected time between two begin impl frame calls.
   base::TimeDelta begin_impl_frame_interval() const {
@@ -692,7 +692,7 @@ class CC_EXPORT LayerTreeHostImpl
 
   gfx::Rect viewport_damage_rect_;
 
-  base::TimeTicks current_frame_timeticks_;
+  BeginFrameArgs current_begin_frame_args_;
 
   // Expected time between two begin impl frame calls.
   base::TimeDelta begin_impl_frame_interval_;