cc: Avoid expensive RenderingStats collection.

cc/nine_patch_layer.h

 // Copyright 2012 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_NINE_PATCH_LAYER_H_
 #define CC_NINE_PATCH_LAYER_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "cc/cc_export.h"
 #include "cc/layer.h"
 #include "cc/image_layer_updater.h"
 #include "ui/gfx/rect.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 
 namespace cc {
 
 class ResourceUpdateQueue;
 
 class CC_EXPORT NinePatchLayer : public Layer {
 public:
     static scoped_refptr<NinePatchLayer> create();
 
     virtual bool drawsContent() const OVERRIDE;
     virtual void setTexturePriorities(const PriorityCalculator&) OVERRIDE;
-    virtual void update(ResourceUpdateQueue&, const OcclusionTracker*, RenderingStats&) OVERRIDE;
+    virtual void update(ResourceUpdateQueue&, const OcclusionTracker*, RenderingStats*) OVERRIDE;
     virtual void pushPropertiesTo(LayerImpl*) OVERRIDE;
 
     // aperture is in the pixel space of the bitmap resource and refers to
     // the center patch of the ninepatch (which is unused in this
     // implementation). We split off eight rects surrounding it and stick them
     // on the edges of the layer. The corners are unscaled, the top and bottom
     // rects are x-stretched to fit, and the left and right rects are
     // y-stretched to fit.
     void setBitmap(const SkBitmap& bitmap, const gfx::Rect& aperture);
 
@@ skipping 11 matching lines @@
     SkBitmap m_bitmap;
     bool m_bitmapDirty;
 
     // The transparent center region that shows the parent layer's contents in image space.
     gfx::Rect m_imageAperture;
 };
 
 }  // namespace cc
 
 #endif  // CC_NINE_PATCH_LAYER_H_