cc: Switch RenderingStats collection in Layer::Update() to RenderingStatsInstrumentation

cc/layers/picture_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_LAYERS_PICTURE_LAYER_H_
 #define CC_LAYERS_PICTURE_LAYER_H_
 
 #include "cc/debug/devtools_instrumentation.h"
 #include "cc/layers/contents_scaling_layer.h"
 #include "cc/layers/layer.h"
 #include "cc/resources/picture_pile.h"
 #include "cc/trees/occlusion_tracker.h"
 
 namespace cc {
 
 class ContentLayerClient;
 class ResourceUpdateQueue;
-struct RenderingStats;
 
 class CC_EXPORT PictureLayer : public ContentsScalingLayer {
  public:
   static scoped_refptr<PictureLayer> Create(ContentLayerClient* client);
 
   void ClearClient() { client_ = NULL; }
 
   // Implement Layer interface
   virtual bool DrawsContent() const OVERRIDE;
   virtual scoped_ptr<LayerImpl> CreateLayerImpl(
       LayerTreeImpl* tree_impl) OVERRIDE;
   virtual void SetLayerTreeHost(LayerTreeHost* host) OVERRIDE;
   virtual void PushPropertiesTo(LayerImpl* layer) OVERRIDE;
   virtual void SetNeedsDisplayRect(const gfx::RectF& layer_rect) OVERRIDE;
   virtual void Update(
       ResourceUpdateQueue* queue,
-      const OcclusionTracker* occlusion,
-      RenderingStats* stats) OVERRIDE;
+      const OcclusionTracker* occlusion) OVERRIDE;
   virtual void SetIsMask(bool is_mask) OVERRIDE;
 
  protected:
   explicit PictureLayer(ContentLayerClient* client);
   virtual ~PictureLayer();
 
  private:
   ContentLayerClient* client_;
   scoped_refptr<PicturePile> pile_;
   devtools_instrumentation::
       ScopedLayerObjectTracker instrumentation_object_tracker_;
   // Invalidation to use the next time update is called.
   Region pending_invalidation_;
   // Invalidation from the last time update was called.
   Region pile_invalidation_;
   bool is_mask_;
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYERS_PICTURE_LAYER_H_