cc: Avoid expensive RenderingStats collection.

cc/layer_tree_host_unittest_occlusion.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/layer_tree_host.h"
 
 #include "cc/layer.h"
 #include "cc/test/layer_tree_test_common.h"
 #include "cc/test/occlusion_tracker_test_common.h"
 
 namespace cc {
 namespace {
 
 class TestLayer : public Layer {
  public:
   static scoped_refptr<TestLayer> Create() {
     return make_scoped_refptr(new TestLayer());
   }
 
   virtual void update(
       ResourceUpdateQueue& update_queue,
       const OcclusionTracker* occlusion,
-      RenderingStats& stats) OVERRIDE {
+      RenderingStats* stats) OVERRIDE {
     if (!occlusion)
       return;
 
     // Gain access to internals of the OcclusionTracker.
     const TestOcclusionTracker* test_occlusion =
         static_cast<const TestOcclusionTracker*>(occlusion);
     occlusion_ = UnionRegions(
         test_occlusion->occlusionFromInsideTarget(),
         test_occlusion->occlusionFromOutsideTarget());
   }
@@ skipping 433 matching lines @@
 
     m_layerTreeHost->setRootLayer(layers[0].get());
     ThreadedTest::setupTree();
   }
 };
 
 SINGLE_AND_MULTI_THREAD_TEST_F(LayerTreeHostOcclusionTestManySurfaces)
 
 }  // namespace
 }  // namespace cc