cc: Add message passing mechanism to micro benchmarking.

content/renderer/gpu/render_widget_compositor.cc

Index: content/renderer/gpu/render_widget_compositor.cc
diff --git a/content/renderer/gpu/render_widget_compositor.cc b/content/renderer/gpu/render_widget_compositor.cc
index d2d0463a2397719e251482c2d20bab989137ddaf..eac6a28184f6aba654619f5270cb5cb9b174128d 100644
--- a/content/renderer/gpu/render_widget_compositor.cc
+++ b/content/renderer/gpu/render_widget_compositor.cc
@@ -413,13 +413,19 @@ const cc::Layer* RenderWidgetCompositor::GetRootLayer() const {
   return layer_tree_host_->root_layer();
 }
 
-bool RenderWidgetCompositor::ScheduleMicroBenchmark(
+int RenderWidgetCompositor::ScheduleMicroBenchmark(
     const std::string& name,
     scoped_ptr<base::Value> value,
     const base::Callback<void(scoped_ptr<base::Value>)>& callback) {
   return layer_tree_host_->ScheduleMicroBenchmark(name, value.Pass(), callback);
 }
 
+bool RenderWidgetCompositor::SendMessageToMicroBenchmark(
+    int id,
+    scoped_ptr<base::Value> value) {
+  return layer_tree_host_->SendMessageToMicroBenchmark(id, value.Pass());
+}
+
 void RenderWidgetCompositor::Initialize(cc::LayerTreeSettings settings) {
   scoped_refptr<base::MessageLoopProxy> compositor_message_loop_proxy;
   RenderThreadImpl* render_thread = RenderThreadImpl::current();