cc: Allow the main thread to cancel commits

cc/scheduler/scheduler.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_H_
 #define CC_SCHEDULER_SCHEDULER_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 66 matching lines @@
 
   void SetMainThreadNeedsLayerTextures();
 
   // Like SetNeedsRedraw(), but ensures the draw will definitely happen even if
   // we are not visible.
   void SetNeedsForcedRedraw();
 
   void DidSwapUseIncompleteTile();
 
   void FinishCommit();
-  void BeginFrameAbortedByMainThread();
+  void BeginFrameAbortedByMainThread(bool cancel_commit);
 
   void DidLoseOutputSurface();
   void DidCreateAndInitializeOutputSurface();
   bool HasInitializedOutputSurface() const {
     return state_machine_.HasInitializedOutputSurface();
   }
 
   bool CommitPending() const { return state_machine_.CommitPending(); }
   bool RedrawPending() const { return state_machine_.RedrawPending(); }
 
@@ skipping 29 matching lines @@
 
   SchedulerStateMachine state_machine_;
   bool inside_process_scheduled_actions_;
 
   DISALLOW_COPY_AND_ASSIGN(Scheduler);
 };
 
 }  // namespace cc
 
 #endif  // CC_SCHEDULER_SCHEDULER_H_