Check media permissions through RenderFrameHostDelegate.

extensions/browser/guest_view/web_view/web_view_guest.h

Index: extensions/browser/guest_view/web_view/web_view_guest.h
diff --git a/extensions/browser/guest_view/web_view/web_view_guest.h b/extensions/browser/guest_view/web_view/web_view_guest.h
index 926a67b74f86f0fc068ba4bc3c481cfac4e94c8a..f5932137daf5dafc47c08c084b83fbf6fbaeb695 100644
--- a/extensions/browser/guest_view/web_view/web_view_guest.h
+++ b/extensions/browser/guest_view/web_view/web_view_guest.h
@@ -121,6 +121,10 @@ class WebViewGuest : public GuestView<WebViewGuest>,
       content::WebContents* source,
       const content::MediaStreamRequest& request,
       const content::MediaResponseCallback& callback) OVERRIDE;
+  virtual bool CheckMediaAccessPermission(
+      content::WebContents* source,
+      const GURL& security_origin,
+      content::MediaStreamType type) OVERRIDE;
   virtual void CanDownload(content::RenderViewHost* render_view_host,
                            const GURL& url,
                            const std::string& request_method,