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

cc/layers/layer.h

 // Copyright 2010 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_LAYER_H_
 #define CC_LAYERS_LAYER_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 25 matching lines @@
 class Animation;
 struct AnimationEvent;
 class LayerAnimationDelegate;
 class LayerImpl;
 class LayerTreeHost;
 class LayerTreeImpl;
 class PriorityCalculator;
 class ResourceUpdateQueue;
 class ScrollbarLayer;
 struct AnimationEvent;
-struct RenderingStats;
+class RenderingStatsInstrumentation;
 
 // Base class for composited layers. Special layer types are derived from
 // this class.
 class CC_EXPORT Layer : public base::RefCounted<Layer>,
                         public LayerAnimationValueObserver {
  public:
   typedef std::vector<scoped_refptr<Layer> > LayerList;
   enum LayerIdLabels {
     PINCH_ZOOM_ROOT_SCROLL_LAYER_ID = -2,
     INVALID_ID = -1,
@@ skipping 203 matching lines @@
 
   bool has_mask() const { return !!mask_layer_; }
   bool has_replica() const { return !!replica_layer_; }
   bool replica_has_mask() const {
     return replica_layer_ && (mask_layer_ || replica_layer_->mask_layer_);
   }
 
   // These methods typically need to be overwritten by derived classes.
   virtual bool DrawsContent() const;
   virtual void Update(ResourceUpdateQueue* queue,
-                      const OcclusionTracker* occlusion,
-                      RenderingStats* stats) {}
+                      const OcclusionTracker* occlusion) {}
   virtual bool NeedMoreUpdates();
   virtual void SetIsMask(bool is_mask) {}
 
   void SetDebugName(const std::string& debug_name);
 
   virtual void PushPropertiesTo(LayerImpl* layer);
 
   void ClearRenderSurface() { draw_properties_.render_surface.reset(); }
   void CreateRenderSurface();
 
@@ skipping 81 matching lines @@
   bool BlocksPendingCommitRecursive() const;
 
   virtual bool CanClipSelf() const;
 
   // Constructs a LayerImpl of the correct runtime type for this Layer type.
   virtual scoped_ptr<LayerImpl> CreateLayerImpl(LayerTreeImpl* tree_impl);
 
   bool NeedsDisplayForTesting() const { return needs_display_; }
   void ResetNeedsDisplayForTesting() { needs_display_ = false; }
 
+  RenderingStatsInstrumentation* rendering_stats_instrumentation() const;
+
  protected:
   friend class LayerImpl;
   friend class TreeSynchronizer;
   virtual ~Layer();
 
   Layer();
 
   void SetNeedsCommit();
   void SetNeedsFullTreeSync();
 
@@ skipping 96 matching lines @@
   WebKit::WebLayerScrollClient* layer_scroll_client_;
 
   DrawProperties<Layer, RenderSurface> draw_properties_;
 
   DISALLOW_COPY_AND_ASSIGN(Layer);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYERS_LAYER_H_