cc: Add message passing mechanism to micro benchmarking.

cc/test/fake_layer_tree_host.h

Index: cc/test/fake_layer_tree_host.h
diff --git a/cc/test/fake_layer_tree_host.h b/cc/test/fake_layer_tree_host.h
index 05fefc3462206b91d79cc4156219611c1af0a307..d7c09a8ea1796c329c0bf5e1e70d6ec1f47a2f43 100644
--- a/cc/test/fake_layer_tree_host.h
+++ b/cc/test/fake_layer_tree_host.h
@@ -37,6 +37,7 @@ class FakeLayerTreeHost : public LayerTreeHost {
   LayerTreeImpl* active_tree() { return host_impl_.active_tree(); }
 
   using LayerTreeHost::ScheduleMicroBenchmark;
+  using LayerTreeHost::SendMessageToMicroBenchmark;
   using LayerTreeHost::SetOutputSurfaceLostForTesting;
   using LayerTreeHost::InitializeSingleThreaded;
   using LayerTreeHost::InitializeForTesting;