Make cc output surface creation async

cc/trees/tree_synchronizer_unittest.cc

 // Copyright 2011 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.
 
 #include "cc/trees/tree_synchronizer.h"
 
 #include <algorithm>
 #include <set>
 #include <vector>
 
@@ skipping 171 matching lines @@
 
   for (size_t i = 0; i < layer_children.size(); ++i) {
     SCOPED_TRACE(base::StringPrintf("child layer %" PRIuS, i).c_str());
     ExpectTreesAreIdentical(
         layer_children[i].get(), layer_impl_children[i], tree_impl);
   }
 }
 
 class TreeSynchronizerTest : public testing::Test {
  public:
-  TreeSynchronizerTest() : host_(FakeLayerTreeHost::Create()) {}
+  TreeSynchronizerTest()
+      : client_(FakeLayerTreeHostClient::DIRECT_3D),
+        host_(FakeLayerTreeHost::Create(&client_)) {}
 
  protected:
+  FakeLayerTreeHostClient client_;
   scoped_ptr<FakeLayerTreeHost> host_;
 };
 
 // Attempts to synchronizes a null tree. This should not crash, and should
 // return a null tree.
 TEST_F(TreeSynchronizerTest, SyncNullTree) {
   scoped_ptr<LayerImpl> layer_impl_tree_root =
       TreeSynchronizer::SynchronizeTrees(static_cast<Layer*>(NULL),
                                          scoped_ptr<LayerImpl>(),
                                          host_->active_tree());
@@ skipping 543 matching lines @@
                           host_impl->active_tree());
 
   // The clip children should have been unhooked.
   EXPECT_EQ(2u, intervening->children().size());
   EXPECT_FALSE(clip_child2->clip_parent());
   EXPECT_FALSE(additional_clip_child->clip_parent());
 }
 
 }  // namespace
 }  // namespace cc