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 40 matching lines @@
 
   bool CommitPending() const {
     return commit_state_ == COMMIT_STATE_FRAME_IN_PROGRESS ||
            commit_state_ == COMMIT_STATE_READY_TO_COMMIT;
   }
 
   bool RedrawPending() const { return needs_redraw_; }
 
   enum Action {
     ACTION_NONE,
-    ACTION_BEGIN_FRAME,
+    ACTION_SEND_BEGIN_FRAME_TO_MAIN_THREAD,
     ACTION_COMMIT,
     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 main thread needs a begin frame callback in order to
+  // make progress.
+  bool BeginFrameNeededByImplThread() 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.
   void SetNeedsForcedRedraw();
 
   // Indicates that a redraw is required because we are currently rendering
   // with a low resolution or checkerboarded tile.
   void DidSwapUseIncompleteTile();
 
   // Indicates whether ACTION_DRAW_IF_POSSIBLE drew to the screen or not.
   void DidDrawIfPossibleCompleted(bool success);
 
   // Indicates that a new commit flow needs to be performed, either to pull
   // updates from the main thread to the impl, or to push deltas from the impl
   // thread to main.
   void SetNeedsCommit();
 
-  // As SetNeedsCommit(), but ensures the BeginFrame will definitely happen even
-  // if we are not visible.  After this call we expect to go through the forced
-  // commit flow and then return to waiting for a non-forced BeginFrame to
-  // finish.
+  // As SetNeedsCommit(), but ensures the begin frame will be sent to the main
+  // thread even if we are not visible.  After this call we expect to go through
+  // the forced commit flow and then return to waiting for a non-forced
+  // begin frame to finish.
   void SetNeedsForcedCommit();
 
-  // Call this only in response to receiving an ACTION_BEGIN_FRAME
-  // from NextAction. Indicates that all painting is complete.
-  void BeginFrameComplete();
+  // Call this only in response to receiving an
+  // ACTION_SEND_BEGIN_FRAME_TO_MAIN_THREAD from NextAction.
+  // Indicates that all painting is complete.
+  void FinishCommit();
 
-  // Call this only in response to receiving an ACTION_BEGIN_FRAME
-  // from NextAction if the client rejects the BeginFrame message.
-  void BeginFrameAborted();
+  // Call this only in response to receiving an
+  // ACTION_SEND_BEGIN_FRAME_TO_MAIN_THREAD from NextAction if the client
+  // rejects the begin frame message.
+  void BeginFrameAbortedByMainThread();
 
   // Request exclusive access to the textures that back single buffered
   // layers on behalf of the main thread. Upon acquisition,
   // ACTION_DRAW_IF_POSSIBLE will not draw until the main thread releases the
   // textures to the impl thread by committing the layers.
   void SetMainThreadNeedsLayerTextures();
 
   // Set that we can create the first OutputSurface and start the scheduler.
   void SetCanStart() { can_start_ = true; }
 
@@ skipping 43 matching lines @@
   int last_frame_number_where_tree_activation_attempted_;
   int last_frame_number_where_check_for_completed_tile_uploads_called_;
   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 expect_immediate_begin_frame_for_main_thread_;
   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_