cc: Remove RenderingStats passed to ContentLayerUpdater during Layer::Update()

cc/resources/layer_updater.h

Index: cc/resources/layer_updater.h
diff --git a/cc/resources/layer_updater.h b/cc/resources/layer_updater.h
index 6cfd0c48661f3f2f16b9ce179db4a3746d893356..5d8eb89ad4e2b2295309a52e909a56ea1914a69f 100644
--- a/cc/resources/layer_updater.h
+++ b/cc/resources/layer_updater.h
@@ -17,7 +17,6 @@ class PrioritizedResource;
 class PrioritizedResourceManager;
 class ResourceUpdateQueue;
 class TextureManager;
-struct RenderingStats;
 
 class CC_EXPORT LayerUpdater : public base::RefCounted<LayerUpdater> {
  public:
@@ -32,8 +31,7 @@ class CC_EXPORT LayerUpdater : public base::RefCounted<LayerUpdater> {
     virtual void Update(ResourceUpdateQueue* queue,
                         gfx::Rect source_rect,
                         gfx::Vector2d dest_offset,
-                        bool partial_update,
-                        RenderingStats* stats) = 0;
+                        bool partial_update) = 0;
    protected:
     explicit Resource(scoped_ptr<PrioritizedResource> texture);
 
@@ -54,8 +52,7 @@ class CC_EXPORT LayerUpdater : public base::RefCounted<LayerUpdater> {
                                gfx::Size tile_size,
                                float contents_width_scale,
                                float contents_height_scale,
-                               gfx::Rect* resulting_opaque_rect,
-                               RenderingStats* stats) {}
+                               gfx::Rect* resulting_opaque_rect) {}
   virtual void ReduceMemoryUsage() {}
 
   // Set true by the layer when it is known that the entire output is going to