Make cc output surface creation async

cc/test/layer_tree_host_common_test.cc

Index: cc/test/layer_tree_host_common_test.cc
diff --git a/cc/test/layer_tree_host_common_test.cc b/cc/test/layer_tree_host_common_test.cc
index 3b6b14b5dec2efcd5ea3ebd6e6259d598de4830c..33e0cafc47c1f06520c1cc28e6268d59811dd610 100644
--- a/cc/test/layer_tree_host_common_test.cc
+++ b/cc/test/layer_tree_host_common_test.cc
@@ -6,12 +6,14 @@
 
 #include "cc/layers/layer.h"
 #include "cc/layers/layer_impl.h"
+#include "cc/test/fake_layer_tree_host.h"
 #include "cc/trees/layer_tree_host_common.h"
 
 namespace cc {
 
 LayerTreeHostCommonTestBase::LayerTreeHostCommonTestBase()
-    : render_surface_layer_list_count_(0) {
+    : client_(FakeLayerTreeHostClient::DIRECT_3D),
+      render_surface_layer_list_count_(0) {
 }
 
 LayerTreeHostCommonTestBase::~LayerTreeHostCommonTestBase() {
@@ -110,4 +112,9 @@ void LayerTreeHostCommonTestBase::ExecuteCalculateDrawProperties(
   LayerTreeHostCommon::CalculateDrawProperties(&inputs);
 }
 
+scoped_ptr<FakeLayerTreeHost>
+LayerTreeHostCommonTestBase::CreateFakeLayerTreeHost() {
+  return FakeLayerTreeHost::Create(&client_);
+}
+
 }  // namespace cc