Avoid destroying surface before the parent surface stops referencing it.

content/browser/compositor/surface_display_output_surface.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_SURFACE_DISPLAY_OUTPUT_SURFACE_H_
 #define CONTENT_BROWSER_COMPOSITOR_SURFACE_DISPLAY_OUTPUT_SURFACE_H_
 
 #include "cc/output/output_surface.h"
 #include "cc/surfaces/surface_factory.h"
 #include "cc/surfaces/surface_factory_client.h"
 #include "cc/surfaces/surface_id_allocator.h"
 
 namespace cc {
 class Display;
 class SurfaceManager;
 }
 
 namespace content {
 
 // This class is maps a compositor OutputSurface to the surface system's Display
 // concept, allowing a compositor client to submit frames for a native root
 // window or physical display.
 class SurfaceDisplayOutputSurface : public cc::OutputSurface,
                                     public cc::SurfaceFactoryClient {
  public:
   // The underlying cc::Display and cc::SurfaceManager must outlive this class.
   SurfaceDisplayOutputSurface(
       cc::SurfaceManager* surface_manager,
-      uint32_t surface_id_namespace,
+      cc::SurfaceIdAllocator* allocator,
       const scoped_refptr<cc::ContextProvider>& context_provider);
   virtual ~SurfaceDisplayOutputSurface();
 
   void set_display(cc::Display* display) { display_ = display; }
   cc::SurfaceFactory* factory() { return &factory_; }
 
   // cc::OutputSurface implementation.
   virtual void SwapBuffers(cc::CompositorFrame* frame) OVERRIDE;
 
   // cc::SurfaceFactoryClient implementation.
   virtual void ReturnResources(
       const cc::ReturnedResourceArray& resources) OVERRIDE;
 
  private:
   void SwapBuffersComplete();
 
   cc::Display* display_;
   cc::SurfaceManager* surface_manager_;
   cc::SurfaceFactory factory_;
   gfx::Size display_size_;
   cc::SurfaceId surface_id_;
-  cc::SurfaceIdAllocator allocator_;
+  cc::SurfaceIdAllocator* allocator_;
 
   DISALLOW_COPY_AND_ASSIGN(SurfaceDisplayOutputSurface);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_COMPOSITOR_SURFACE_DISPLAY_OUTPUT_SURFACE_H_