| Index: content/browser/compositor/browser_compositor_output_surface.h | 
| diff --git a/content/browser/compositor/browser_compositor_output_surface.h b/content/browser/compositor/browser_compositor_output_surface.h | 
| index 44c6fcdaa6ed1db798240ede60ff6f9db126bc5d..a6f557ddd040d5233b15f58492cb280e35619ae9 100644 | 
| --- a/content/browser/compositor/browser_compositor_output_surface.h | 
| +++ b/content/browser/compositor/browser_compositor_output_surface.h | 
| @@ -29,7 +29,6 @@ class CONTENT_EXPORT BrowserCompositorOutputSurface | 
|  | 
| // cc::OutputSurface implementation. | 
| virtual bool BindToClient(cc::OutputSurfaceClient* client) override; | 
| -  virtual void OnSwapBuffersComplete() override; | 
|  | 
| // ui::CompositorOutputSurface::Observer implementation. | 
| virtual void OnUpdateVSyncParameters(base::TimeTicks timebase, | 
| @@ -41,7 +40,7 @@ class CONTENT_EXPORT BrowserCompositorOutputSurface | 
| void SetReflector(ReflectorImpl* reflector); | 
|  | 
| #if defined(OS_MACOSX) | 
| -  void OnSurfaceDisplayed(); | 
| +  virtual void OnSurfaceDisplayed() = 0; | 
| #endif | 
|  | 
| protected: | 
|  |