cc: Avoid expensive RenderingStats collection.

cc/bitmap_content_layer_updater.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_BITMAP_CONTENT_LAYER_UPDATER_H_
 #define CC_BITMAP_CONTENT_LAYER_UPDATER_H_
 
 #include "cc/cc_export.h"
 #include "cc/content_layer_updater.h"
 
 class SkCanvas;
 
 namespace cc {
 
 class LayerPainter;
 
 // This class rasterizes the contentRect into a skia bitmap canvas. It then updates
 // textures by copying from the canvas into the texture, using MapSubImage if
 // possible.
 class CC_EXPORT BitmapContentLayerUpdater : public ContentLayerUpdater {
 public:
     class Resource : public LayerUpdater::Resource {
     public:
         Resource(BitmapContentLayerUpdater*, scoped_ptr<PrioritizedResource>);
         virtual ~Resource();
 
-        virtual void update(ResourceUpdateQueue&, const gfx::Rect& sourceRect, const gfx::Vector2d& destOffset, bool partialUpdate, RenderingStats&) OVERRIDE;
+        virtual void update(ResourceUpdateQueue&, const gfx::Rect& sourceRect, const gfx::Vector2d& destOffset, bool partialUpdate, RenderingStats*) OVERRIDE;
 
     private:
         BitmapContentLayerUpdater* updater() { return m_updater; }
 
         BitmapContentLayerUpdater* m_updater;
     };
 
     static scoped_refptr<BitmapContentLayerUpdater> create(scoped_ptr<LayerPainter>);
 
     virtual scoped_ptr<LayerUpdater::Resource> createResource(PrioritizedResourceManager*) OVERRIDE;
-    virtual void prepareToUpdate(const gfx::Rect& contentRect, const gfx::Size& tileSize, float contentsWidthScale, float contentsHeightScale, gfx::Rect& resultingOpaqueRect, RenderingStats&) OVERRIDE;
+    virtual void prepareToUpdate(const gfx::Rect& contentRect, const gfx::Size& tileSize, float contentsWidthScale, float contentsHeightScale, gfx::Rect& resultingOpaqueRect, RenderingStats*) OVERRIDE;
     void updateTexture(ResourceUpdateQueue&, PrioritizedResource*, const gfx::Rect& sourceRect, const gfx::Vector2d& destOffset, bool partialUpdate);
 
     virtual void setOpaque(bool) OVERRIDE;
 
 protected:
     explicit BitmapContentLayerUpdater(scoped_ptr<LayerPainter>);
     virtual ~BitmapContentLayerUpdater();
 
     scoped_ptr<SkCanvas> m_canvas;
     gfx::Size m_canvasSize;
     bool m_opaque;
 };
 
 }  // namespace cc
 
 #endif  // CC_BITMAP_CONTENT_LAYER_UPDATER_H_