cc: Plumbing for impl thread micro benchmarks

cc/debug/micro_benchmark_controller.h

Index: cc/debug/micro_benchmark_controller.h
diff --git a/cc/debug/micro_benchmark_controller.h b/cc/debug/micro_benchmark_controller.h
index 63cf9c7a8d475cdadf5bf7334de76ce1526e4943..e3a4245799c23ff0ec514217a785b165f608b24a 100644
--- a/cc/debug/micro_benchmark_controller.h
+++ b/cc/debug/micro_benchmark_controller.h
@@ -14,13 +14,13 @@
 
 namespace base {
 class Value;
+class MessageLoopProxy;
 }  // namespace base
 
 namespace cc {
 
 class LayerTreeHost;
-class Layer;
-class PictureLayer;
+class LayerTreeHostImpl;
 class MicroBenchmarkController {
  public:
   explicit MicroBenchmarkController(LayerTreeHost* host);
@@ -32,11 +32,14 @@ class MicroBenchmarkController {
                    scoped_ptr<base::Value> value,
                    const MicroBenchmark::DoneCallback& callback);
 
+  void ScheduleImplBenchmarks(LayerTreeHostImpl* host_impl);
+
  private:
   void CleanUpFinishedBenchmarks();
 
   LayerTreeHost* host_;
   ScopedPtrVector<MicroBenchmark> benchmarks_;
+  scoped_refptr<base::MessageLoopProxy> main_controller_message_loop_;
 
   DISALLOW_COPY_AND_ASSIGN(MicroBenchmarkController);
 };