cc: Improve frame/commit accounting

cc/CCThreadProxy.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 CCThreadProxy_h
 #define CCThreadProxy_h
 
 #include "CCAnimationEvents.h"
 #include "CCCompletionEvent.h"
 #include "CCLayerTreeHostImpl.h"
@@ skipping 158 matching lines @@
     // Set when we need to reset the contentsTexturesPurged flag after the
     // commit.
     bool m_resetContentsTexturesPurgedAfterCommitOnImplThread;
 
     // Set when the next draw should post didCommitAndDrawFrame to the main thread.
     bool m_nextFrameIsNewlyCommittedFrameOnImplThread;
 
     bool m_renderVSyncEnabled;
 
     base::TimeDelta m_totalCommitTime;
-    size_t m_totalCommitCount;
+    uint64_t m_totalCommitCount;
 };
 
 }
 
 #endif