| Index: content/browser/frame_host/cross_process_frame_connector.cc | 
| diff --git a/content/browser/frame_host/cross_process_frame_connector.cc b/content/browser/frame_host/cross_process_frame_connector.cc | 
| index 8c473e2cba2a1c9740758f1aec2204b254a3f4aa..d9da44ad29f6092e584f5f529186379d572b20ed 100644 | 
| --- a/content/browser/frame_host/cross_process_frame_connector.cc | 
| +++ b/content/browser/frame_host/cross_process_frame_connector.cc | 
| @@ -152,6 +152,7 @@ void CrossProcessFrameConnector::GetScreenInfo(blink::WebScreenInfo* results) { | 
| if (frame_proxy_in_parent_renderer_->frame_tree_node() | 
| ->render_manager() | 
| ->ForInnerDelegate()) { | 
| +    DCHECK(frame_proxy_in_parent_renderer_->frame_tree_node()->IsMainFrame()); | 
| return; | 
| } | 
|  | 
|  |