Make cc output surface creation async

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 d7c09a8ea1796c329c0bf5e1e70d6ec1f47a2f43..c99edb3be2c9df149c386d1c6183b9bbe1ea6c68 100644
--- a/cc/test/fake_layer_tree_host.h
+++ b/cc/test/fake_layer_tree_host.h
@@ -18,12 +18,12 @@ namespace cc {
 
 class FakeLayerTreeHost : public LayerTreeHost {
  public:
-  static scoped_ptr<FakeLayerTreeHost> Create();
-
+  static scoped_ptr<FakeLayerTreeHost> Create(FakeLayerTreeHostClient* client);
   static scoped_ptr<FakeLayerTreeHost> Create(
+      FakeLayerTreeHostClient* client,
       const LayerTreeSettings& settings);
 
-  virtual ~FakeLayerTreeHost() {}
+  virtual ~FakeLayerTreeHost();
 
   virtual void SetNeedsCommit() OVERRIDE;
   virtual void SetNeedsFullTreeSync() OVERRIDE {}
@@ -52,10 +52,11 @@ class FakeLayerTreeHost : public LayerTreeHost {
   bool needs_commit() { return needs_commit_; }
 
  private:
-  FakeLayerTreeHost(LayerTreeHostClient* client,
+  FakeLayerTreeHost(FakeLayerTreeHostClient* client,
                     const LayerTreeSettings& settings);
 
   FakeImplProxy proxy_;
+  FakeLayerTreeHostClient* client_;
   TestSharedBitmapManager manager_;
   FakeLayerTreeHostImpl host_impl_;
   bool needs_commit_;