Check media permissions through RenderFrameHostDelegate.

extensions/browser/extension_host.cc

Index: extensions/browser/extension_host.cc
diff --git a/extensions/browser/extension_host.cc b/extensions/browser/extension_host.cc
index 2f0572e5330abb1ec9c2c937c011f5e162e71fc3..3920e479cfafa55d85302672f9479c637de520ee 100644
--- a/extensions/browser/extension_host.cc
+++ b/extensions/browser/extension_host.cc
@@ -428,6 +428,14 @@ void ExtensionHost::RequestMediaAccessPermission(
       web_contents, request, callback, extension());
 }
 
+bool ExtensionHost::CheckMediaAccessPermission(
+    content::WebContents* web_contents,
+    const GURL& security_origin,
+    content::MediaStreamType type) {
+  return delegate_->CheckMediaAccessPermission(
+      web_contents, security_origin, type, extension());
+}
+
 bool ExtensionHost::IsNeverVisible(content::WebContents* web_contents) {
   ViewType view_type = extensions::GetViewType(web_contents);
   return view_type == extensions::VIEW_TYPE_EXTENSION_BACKGROUND_PAGE;