Check media permissions through RenderFrameHostDelegate.

apps/custom_launcher_page_contents.cc

Index: apps/custom_launcher_page_contents.cc
diff --git a/apps/custom_launcher_page_contents.cc b/apps/custom_launcher_page_contents.cc
index 023c30580dd8dd625481d55e2d8ae236b61176f4..7a2f4b2b06e0885975f6ebd9daa60c250b7c27bd 100644
--- a/apps/custom_launcher_page_contents.cc
+++ b/apps/custom_launcher_page_contents.cc
@@ -126,6 +126,14 @@ void CustomLauncherPageContents::RequestMediaAccessPermission(
   helper_->RequestMediaAccessPermission(request, callback);
 }
 
+bool CustomLauncherPageContents::CheckMediaAccessPermission(
+    content::WebContents* web_contents,
+    const GURL& security_origin,
+    content::MediaStreamType type) {
+  DCHECK_EQ(web_contents_.get(), web_contents);
+  return helper_->CheckMediaAccessPermission(security_origin, type);
+}
+
 bool CustomLauncherPageContents::OnMessageReceived(
     const IPC::Message& message) {
   bool handled = true;