| Index: content/browser/compositor/delegated_frame_host.h | 
| diff --git a/content/browser/compositor/delegated_frame_host.h b/content/browser/compositor/delegated_frame_host.h | 
| index 0b294b61d3ebafba72cdfd7673fa480d70c20fe7..05197923e5b76fd3f8b08a1bd457121cf1b5fa71 100644 | 
| --- a/content/browser/compositor/delegated_frame_host.h | 
| +++ b/content/browser/compositor/delegated_frame_host.h | 
| @@ -153,6 +153,8 @@ class CONTENT_EXPORT DelegatedFrameHost | 
| void EndFrameSubscription(); | 
| bool HasFrameSubscriber() const { return frame_subscriber_; } | 
| uint32_t GetSurfaceIdNamespace(); | 
| +  // Returns a null SurfaceId if this DelegatedFrameHost has not yet created | 
| +  // a compositor Surface. | 
| cc::SurfaceId SurfaceIdAtPoint(const gfx::Point& point, | 
| gfx::Point* transformed_point); | 
|  | 
|  |