Don't destroy RenderWidgetCompositor during DoDeferredClose

content/renderer/gpu/render_widget_compositor.h

 // Copyright (c) 2013 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 CONTENT_RENDERER_GPU_RENDER_WIDGET_COMPOSITOR_H_
 #define CONTENT_RENDERER_GPU_RENDER_WIDGET_COMPOSITOR_H_
 
 #include "base/callback.h"
 #include "base/memory/weak_ptr.h"
 #include "base/time/time.h"
@@ skipping 57 matching lines @@
   int GetLayerTreeId() const;
   int GetSourceFrameNumber() const;
   void SetNeedsCommit();
   void NotifyInputThrottledUntilCommit();
   const cc::Layer* GetRootLayer() const;
   int ScheduleMicroBenchmark(
       const std::string& name,
       scoped_ptr<base::Value> value,
       const base::Callback<void(scoped_ptr<base::Value>)>& callback);
   bool SendMessageToMicroBenchmark(int id, scoped_ptr<base::Value> value);
+  void Shutdown();
 
   // WebLayerTreeView implementation.
   virtual void setSurfaceReady();
   virtual void setRootLayer(const blink::WebLayer& layer);
   virtual void clearRootLayer();
   virtual void setViewportSize(
       const blink::WebSize& unused_deprecated,
       const blink::WebSize& device_viewport_size);
   virtual void setViewportSize(const blink::WebSize& device_viewport_size);
   virtual blink::WebSize layoutViewportSize() const;
@@ skipping 63 matching lines @@
   void Initialize(cc::LayerTreeSettings settings);
 
   bool threaded_;
   RenderWidget* widget_;
   scoped_ptr<cc::LayerTreeHost> layer_tree_host_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_GPU_RENDER_WIDGET_COMPOSITOR_H_