cc: Avoid expensive RenderingStats collection.

cc/contents_scaling_layer.cc

 // 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.
 
 #include "cc/contents_scaling_layer.h"
 #include "ui/gfx/size_conversions.h"
 
 namespace cc {
 
 gfx::Size ContentsScalingLayer::computeContentBoundsForScale(float scaleX, float scaleY) const {
@@ skipping 23 matching lines @@
 
 void ContentsScalingLayer::didUpdateBounds() {
   drawProperties().content_bounds = computeContentBoundsForScale(
       contentsScaleX(),
       contentsScaleY());
 }
 
 void ContentsScalingLayer::update(
     ResourceUpdateQueue& queue,
     const OcclusionTracker* occlusion,
-    RenderingStats& stats) {
+    RenderingStats* stats) {
   if (drawProperties().contents_scale_x == last_update_contents_scale_x_ &&
       drawProperties().contents_scale_y == last_update_contents_scale_y_)
     return;
   
   last_update_contents_scale_x_ = drawProperties().contents_scale_x;
   last_update_contents_scale_y_ = drawProperties().contents_scale_y;
   // Invalidate the whole layer if scale changed.
   setNeedsDisplayRect(gfx::Rect(bounds()));
 }
 
 }  // namespace cc