cc: Avoid expensive RenderingStats collection.

cc/bitmap_skpicture_content_layer_updater.h

Index: cc/bitmap_skpicture_content_layer_updater.h
diff --git a/cc/bitmap_skpicture_content_layer_updater.h b/cc/bitmap_skpicture_content_layer_updater.h
index db09eb77ce15833c751c64921d886b0a49ea09cd..60c7745e63864b3f67c602264d3773dcf886255a 100644
--- a/cc/bitmap_skpicture_content_layer_updater.h
+++ b/cc/bitmap_skpicture_content_layer_updater.h
@@ -18,7 +18,7 @@ public:
     public:
         Resource(BitmapSkPictureContentLayerUpdater*, scoped_ptr<PrioritizedResource>);
 
-        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:
         BitmapSkPictureContentLayerUpdater* updater() { return m_updater; }
@@ -30,7 +30,7 @@ public:
     static scoped_refptr<BitmapSkPictureContentLayerUpdater> create(scoped_ptr<LayerPainter>);
 
     virtual scoped_ptr<LayerUpdater::Resource> createResource(PrioritizedResourceManager*) OVERRIDE;
-    void paintContentsRect(SkCanvas*, const gfx::Rect& sourceRect, RenderingStats&);
+    void paintContentsRect(SkCanvas*, const gfx::Rect& sourceRect, RenderingStats*);
 
 private:
     explicit BitmapSkPictureContentLayerUpdater(scoped_ptr<LayerPainter>);