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

cc/trees/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/trees/layer_tree_host.h"
 
 #include "cc/layers/layer.h"
 #include "cc/test/layer_tree_test.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 {
+      const OcclusionTracker* occlusion) OVERRIDE {
     if (!occlusion)
       return;
 
     // Gain access to internals of the OcclusionTracker.
     const TestOcclusionTracker* test_occlusion =
         static_cast<const TestOcclusionTracker*>(occlusion);
     occlusion_ = UnionRegions(
         test_occlusion->occlusion_from_inside_target(),
         test_occlusion->occlusion_from_outside_target());
   }
@@ skipping 433 matching lines @@
 
     layer_tree_host()->SetRootLayer(layers[0]);
     LayerTreeTest::SetupTree();
   }
 };
 
 SINGLE_AND_MULTI_THREAD_TEST_F(LayerTreeHostOcclusionTestManySurfaces)
 
 }  // namespace
 }  // namespace cc