| Index: content/browser/compositor/delegated_frame_host.cc | 
| diff --git a/content/browser/compositor/delegated_frame_host.cc b/content/browser/compositor/delegated_frame_host.cc | 
| index 444adb8e929f372dd0c730f13bb6fe4a5b617a68..84e18d6855670ef4bd1eec8336a8d21516778a19 100644 | 
| --- a/content/browser/compositor/delegated_frame_host.cc | 
| +++ b/content/browser/compositor/delegated_frame_host.cc | 
| @@ -208,6 +208,8 @@ uint32_t DelegatedFrameHost::GetSurfaceIdNamespace() { | 
| cc::SurfaceId DelegatedFrameHost::SurfaceIdAtPoint( | 
| const gfx::Point& point, | 
| gfx::Point* transformed_point) { | 
| +  if (surface_id_.is_null()) | 
| +    return surface_id_; | 
| cc::SurfaceHittest hittest(GetSurfaceManager()); | 
| return hittest.Hittest(surface_id_, point, transformed_point); | 
| } | 
|  |