Don't destroy RenderWidgetCompositor during DoDeferredClose

cc/trees/layer_tree_host.h

 // 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.
 
 #ifndef CC_TREES_LAYER_TREE_HOST_H_
 #define CC_TREES_LAYER_TREE_HOST_H_
 
 #include <limits>
 #include <list>
 #include <set>
@@ skipping 80 matching lines @@
 
   static scoped_ptr<LayerTreeHost> CreateSingleThreaded(
       LayerTreeHostClient* client,
       LayerTreeHostSingleThreadClient* single_thread_client,
       SharedBitmapManager* manager,
       const LayerTreeSettings& settings,
       scoped_refptr<base::SingleThreadTaskRunner> main_task_runner);
   virtual ~LayerTreeHost();
 
   void SetLayerTreeHostClientReady();
+  void SetLayerTreeHostClientFinished();
 
   // LayerTreeHost interface to Proxy.
   void WillBeginMainFrame() {
     client_->WillBeginMainFrame(source_frame_number_);
   }
   void DidBeginMainFrame();
   void BeginMainFrame(const BeginFrameArgs& args);
   void AnimateLayers(base::TimeTicks monotonic_frame_begin_time);
   void DidStopFlinging();
   void Layout();
@@ skipping 342 matching lines @@
 
   ScopedPtrVector<SwapPromise> swap_promise_list_;
   std::set<SwapPromiseMonitor*> swap_promise_monitor_;
 
   DISALLOW_COPY_AND_ASSIGN(LayerTreeHost);
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_LAYER_TREE_HOST_H_