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

cc/trees/layer_tree_host_unittest.cc

Index: cc/trees/layer_tree_host_unittest.cc
diff --git a/cc/trees/layer_tree_host_unittest.cc b/cc/trees/layer_tree_host_unittest.cc
index 67a45750004e86b3af59b627a2259840dba3a22e..80f957596f52cca80ad004963ffc9d71101070d3 100644
--- a/cc/trees/layer_tree_host_unittest.cc
+++ b/cc/trees/layer_tree_host_unittest.cc
@@ -694,9 +694,9 @@ public:
     int paintContentsCount() { return m_paintContentsCount; }
     void resetPaintContentsCount() { m_paintContentsCount = 0; }
 
-    virtual void Update(ResourceUpdateQueue* queue, const OcclusionTracker* occlusion, RenderingStats* stats) OVERRIDE
+    virtual void Update(ResourceUpdateQueue* queue, const OcclusionTracker* occlusion) OVERRIDE
     {
-        ContentLayer::Update(queue, occlusion, stats);
+        ContentLayer::Update(queue, occlusion);
         m_paintContentsCount++;
     }
 
@@ -1375,7 +1375,7 @@ class EvictionTestLayer : public Layer {
 public:
     static scoped_refptr<EvictionTestLayer> Create() { return make_scoped_refptr(new EvictionTestLayer()); }
 
-    virtual void Update(ResourceUpdateQueue*, const OcclusionTracker*, RenderingStats*) OVERRIDE;
+    virtual void Update(ResourceUpdateQueue*, const OcclusionTracker*) OVERRIDE;
     virtual bool DrawsContent() const OVERRIDE { return true; }
 
     virtual scoped_ptr<LayerImpl> CreateLayerImpl(LayerTreeImpl* treeImpl) OVERRIDE;
@@ -1434,7 +1434,7 @@ void EvictionTestLayer::SetTexturePriorities(const PriorityCalculator&)
     m_texture->set_request_priority(PriorityCalculator::UIPriority(true));
 }
 
-void EvictionTestLayer::Update(ResourceUpdateQueue* queue, const OcclusionTracker*, RenderingStats*)
+void EvictionTestLayer::Update(ResourceUpdateQueue* queue, const OcclusionTracker*)
 {
     createTextureIfNeeded();
     if (!m_texture.get())