Avoid destroying surface before the parent surface stops referencing it.

content/browser/compositor/gpu_process_transport_factory.h

Index: content/browser/compositor/gpu_process_transport_factory.h
diff --git a/content/browser/compositor/gpu_process_transport_factory.h b/content/browser/compositor/gpu_process_transport_factory.h
index 3e54895ddb024f66d2879ed38eefffea56ae2a7e..501a6cdf81f5e2eab3074aff0141cd7ca08bd65b 100644
--- a/content/browser/compositor/gpu_process_transport_factory.h
+++ b/content/browser/compositor/gpu_process_transport_factory.h
@@ -56,12 +56,12 @@ class GpuProcessTransportFactory
   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;