- Electron version: v1.2.2
- Operating system: OS X El Capitan 10.11.5

When `<webview>.isAudioMuted() === true` [Notifications](https://developer.mozilla.org/de/docs/Web/API/notification) from the Webview still make sounds.

atom/browser/atom_browser_client.cc
const content::MainFunctionParams&) {
  v8::V8::Initialize();  
  return new AtomBrowserMainParts;
}
void AtomBrowserClient::WebNotificationAllowed(