[Extensions] Don't show a blocked action for webRequest on subframes

chrome/browser/extensions/api/web_request/chrome_extension_web_request_event_router_delegate.cc

Index: chrome/browser/extensions/api/web_request/chrome_extension_web_request_event_router_delegate.cc
diff --git a/chrome/browser/extensions/api/web_request/chrome_extension_web_request_event_router_delegate.cc b/chrome/browser/extensions/api/web_request/chrome_extension_web_request_event_router_delegate.cc
index 96f2a1c76d7a059a8c83f39e83f86718e307b814..e473d02dd0f3c46704380b05fbe1f5d1287ba27f 100644
--- a/chrome/browser/extensions/api/web_request/chrome_extension_web_request_event_router_delegate.cc
+++ b/chrome/browser/extensions/api/web_request/chrome_extension_web_request_event_router_delegate.cc
@@ -22,6 +22,11 @@ void NotifyWebRequestWithheldOnUI(int render_process_id,
       content::RenderFrameHost::FromID(render_process_id, render_frame_id);
   if (!rfh)
     return;
+  // We don't count subframe blocked actions as yet, since there's no way to
+  // surface this to the user. Ignore these (which is also what we do for
+  // content scripts).
+  if (rfh->GetParent())
+    return;
   content::WebContents* web_contents =
       content::WebContents::FromRenderFrameHost(rfh);
   if (!web_contents)