Add average commit time to perf tests.

cc/CCLayerTreeHost.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 CCLayerTreeHost_h
 #define CCLayerTreeHost_h
 
 #include "CCAnimationEvents.h"
 #include "CCGraphicsContext.h"
 #include "CCLayerTreeHostClient.h"
@@ skipping 115 matching lines @@
 
     // Composites and attempts to read back the result into the provided
     // buffer. If it wasn't possible, e.g. due to context lost, will return
     // false.
     bool compositeAndReadback(void *pixels, const IntRect&);
 
     void finishAllRendering();
 
     int commitNumber() const { return m_commitNumber; }
 
-    void renderingStats(CCRenderingStats&) const;
+    void renderingStats(CCRenderingStats*) const;
 
     const RendererCapabilities& rendererCapabilities() const;
 
     // Test only hook
     void loseContext(int numTimes);
 
     void setNeedsAnimate();
     // virtual for testing
     virtual void setNeedsCommit();
     void setNeedsRedraw();
@@ skipping 127 matching lines @@
     typedef OwnPtrVector<CCPrioritizedTexture> TextureList;
     TextureList m_deleteTextureAfterCommitList;
     size_t m_partialTextureUpdateRequests;
 
     static bool s_needsFilterContext;
 };
 
 }
 
 #endif