cc: Plumbing for impl thread micro benchmarks

cc/layers/layer_impl.cc

Index: cc/layers/layer_impl.cc
diff --git a/cc/layers/layer_impl.cc b/cc/layers/layer_impl.cc
index 894daf1a27f04cd2b40dfc70436b806af3e59d65..00d11ed642f109efa250de10f3796c72eaab108f 100644
--- a/cc/layers/layer_impl.cc
+++ b/cc/layers/layer_impl.cc
@@ -1,4 +1,4 @@
-// Copyright 2011 The Chromium Authors. All rights reserved.
+// 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.
 
@@ -13,6 +13,7 @@
 #include "cc/base/math_util.h"
 #include "cc/debug/debug_colors.h"
 #include "cc/debug/layer_tree_debug_state.h"
+#include "cc/debug/micro_benchmark_impl.h"
 #include "cc/debug/traced_value.h"
 #include "cc/input/layer_scroll_offset_delegate.h"
 #include "cc/layers/painted_scrollbar_layer_impl.h"
@@ -1339,4 +1340,8 @@ scoped_ptr<base::Value> LayerImpl::AsValue() const {
   return state.PassAs<base::Value>();
 }
 
+void LayerImpl::RunMicroBenchmark(MicroBenchmarkImpl* benchmark) {
+  benchmark->RunOnLayer(this);
+}
+
 }  // namespace cc