| Index: ui/gfx/gl/gl_surface.h | 
| diff --git a/ui/gfx/gl/gl_surface.h b/ui/gfx/gl/gl_surface.h | 
| index 5843a9cf99580baab249bbe6e81df21e08b42f19..150182e8ed1fd29fd007e98fa5b7ede90f9e6dc4 100644 | 
| --- a/ui/gfx/gl/gl_surface.h | 
| +++ b/ui/gfx/gl/gl_surface.h | 
| @@ -50,6 +50,10 @@ class GL_EXPORT GLSurface : public base::RefCounted<GLSurface> { | 
| // FBO. Otherwise returns 0. | 
| virtual unsigned int GetBackingFrameBufferObject(); | 
|  | 
| +  // Copy part of the backbuffer to the frontbuffer. | 
| +  virtual bool SupportsPostSubBuffer(); | 
| +  virtual bool PostSubBuffer(int x, int y, int width, int height); | 
| + | 
| static bool InitializeOneOff(); | 
|  | 
| // Called after a context is made current with this surface. Returns false | 
|  |