Avoid destroying surface before the parent surface stops referencing it.

content/browser/compositor/gpu_process_transport_factory.h

 // Copyright 2014 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_BROWSER_COMPOSITOR_GPU_PROCESS_TRANSPORT_FACTORY_H_
 #define CONTENT_BROWSER_COMPOSITOR_GPU_PROCESS_TRANSPORT_FACTORY_H_
 
 #include <map>
 
 #include "base/id_map.h"
@@ skipping 38 matching lines @@
       ui::Compositor* source,
       ui::Layer* target) override;
   virtual void RemoveReflector(
       scoped_refptr<ui::Reflector> reflector) override;
   virtual void RemoveCompositor(ui::Compositor* compositor) override;
   virtual scoped_refptr<cc::ContextProvider>
       SharedMainThreadContextProvider() override;
   virtual bool DoesCreateTestContexts() override;
   virtual cc::SharedBitmapManager* GetSharedBitmapManager() override;
   virtual base::MessageLoopProxy* GetCompositorMessageLoop() override;
+  virtual scoped_ptr<cc::SurfaceIdAllocator> CreateSurfaceIdAllocator()
+      override;
 
   // ImageTransportFactory implementation.
   virtual ui::ContextFactory* GetContextFactory() override;
   virtual gfx::GLSurfaceHandle GetSharedSurfaceHandle() override;
-  virtual scoped_ptr<cc::SurfaceIdAllocator> CreateSurfaceIdAllocator()
-      override;
   virtual cc::SurfaceManager* GetSurfaceManager() override;
   virtual GLHelper* GetGLHelper() override;
   virtual void AddObserver(ImageTransportFactoryObserver* observer) override;
   virtual void RemoveObserver(
       ImageTransportFactoryObserver* observer) override;
 #if defined(OS_MACOSX)
   virtual void OnSurfaceDisplayed(int surface_id) override;
 #endif
 
  private:
@@ skipping 22 matching lines @@
   scoped_refptr<BrowserCompositorOutputSurfaceProxy> output_surface_proxy_;
 
   base::WeakPtrFactory<GpuProcessTransportFactory> callback_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuProcessTransportFactory);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_COMPOSITOR_GPU_PROCESS_TRANSPORT_FACTORY_H_