| Index: content/renderer/render_frame_impl.h | 
| diff --git a/content/renderer/render_frame_impl.h b/content/renderer/render_frame_impl.h | 
| index 4863460d6fa04a24ce4446835ff569e889881c8f..a31276bbb6330d999c1e41d79b85f2d93e2c7e6a 100644 | 
| --- a/content/renderer/render_frame_impl.h | 
| +++ b/content/renderer/render_frame_impl.h | 
| @@ -738,7 +738,9 @@ class CONTENT_EXPORT RenderFrameImpl | 
| RendererCdmManager* GetCdmManager(); | 
| #endif | 
|  | 
| -  // Stores the WebLocalFrame we are associated with. | 
| +  // Stores the WebLocalFrame we are associated with.  This is null from the | 
| +  // constructor until SetWebFrame is called, and it is null after | 
| +  // frameDetached is called until destruction (which may be asynchronous). | 
| blink::WebLocalFrame* frame_; | 
|  | 
| base::WeakPtr<RenderViewImpl> render_view_; | 
|  |