Check media permissions through RenderFrameHostDelegate.

extensions/browser/app_window/app_window.cc

Index: extensions/browser/app_window/app_window.cc
diff --git a/extensions/browser/app_window/app_window.cc b/extensions/browser/app_window/app_window.cc
index 4e791ef50440f6a28f3fd8d85812495808eef16c..6f03c3afff838207be34aa2244f54f015ebd1ebf 100644
--- a/extensions/browser/app_window/app_window.cc
+++ b/extensions/browser/app_window/app_window.cc
@@ -363,6 +363,13 @@ void AppWindow::RequestMediaAccessPermission(
   helper_->RequestMediaAccessPermission(request, callback);
 }
 
+bool AppWindow::CheckMediaAccessPermission(content::WebContents* web_contents,
+                                           const GURL& security_origin,
+                                           content::MediaStreamType type) {
+  DCHECK_EQ(AppWindow::web_contents(), web_contents);
+  return helper_->CheckMediaAccessPermission(security_origin, type);
+}
+
 WebContents* AppWindow::OpenURLFromTab(WebContents* source,
                                        const content::OpenURLParams& params) {
   DCHECK_EQ(web_contents(), source);