cc: Rename VSync to BeginFrame

cc/scheduler/scheduler_state_machine.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_SCHEDULER_SCHEDULER_STATE_MACHINE_H_
 #define CC_SCHEDULER_SCHEDULER_STATE_MACHINE_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 52 matching lines @@
     ACTION_CHECK_FOR_COMPLETED_TILE_UPLOADS,
     ACTION_ACTIVATE_PENDING_TREE_IF_NEEDED,
     ACTION_DRAW_IF_POSSIBLE,
     ACTION_DRAW_FORCED,
     ACTION_BEGIN_OUTPUT_SURFACE_CREATION,
     ACTION_ACQUIRE_LAYER_TEXTURES_FOR_MAIN_THREAD,
   };
   Action NextAction() const;
   void UpdateState(Action action);
 
-  // Indicates whether the scheduler needs a vsync callback in order to make
-  // progress.
-  bool VSyncCallbackNeeded() const;
+  // Indicates whether the scheduler needs a BeginFrame callback in order to
+  // make progress.
+  bool BeginFrameCallbackNeeded() const;
 
-  // Indicates that the system has entered and left a vsync callback.
-  // The scheduler will not draw more than once in a given vsync callback.
-  void DidEnterVSync();
-  void DidLeaveVSync();
+  // Indicates that the system has entered and left a BeginFrame callback.
+  // The scheduler will not draw more than once in a given BeginFrame callback.
+  void DidEnterBeginFrame();
+  void DidLeaveBeginFrame();
 
   // Indicates whether the LayerTreeHostImpl is visible.
   void SetVisible(bool visible);
 
   // Indicates that a redraw is required, either due to the impl tree changing
   // or the screen being damaged and simply needing redisplay.
   void SetNeedsRedraw();
 
   // As SetNeedsRedraw(), but ensures the draw will definitely happen even if
   // we are not visible.
@@ skipping 82 matching lines @@
   int consecutive_failed_draws_;
   int maximum_number_of_failed_draws_before_draw_is_forced_;
   bool needs_redraw_;
   bool swap_used_incomplete_tile_;
   bool needs_forced_redraw_;
   bool needs_forced_redraw_after_next_commit_;
   bool needs_commit_;
   bool needs_forced_commit_;
   bool expect_immediate_begin_frame_;
   bool main_thread_needs_layer_textures_;
-  bool inside_vsync_;
+  bool inside_begin_frame_;
   bool visible_;
   bool can_start_;
   bool can_draw_;
   bool has_pending_tree_;
   bool draw_if_possible_failed_;
   TextureState texture_state_;
   OutputSurfaceState output_surface_state_;
   bool did_create_and_initialize_first_output_surface_;
 
   DISALLOW_COPY_AND_ASSIGN(SchedulerStateMachine);
 };
 
 }  // namespace cc
 
 #endif  // CC_SCHEDULER_SCHEDULER_STATE_MACHINE_H_