title: Chrome desktop notification click to focus on content
body: <p>I am building desktop notification into my a chrome extension that I am working on.  The functionality I need required that the user be taken to the tab that caused the notification when they click on the notification window.  I can get that working using the chrome.tabs API, but what I can't manage to figure out is how to bring Chrome to the front when the notification is clicked.  </p>
  
  <p>I know window.focus() is disabled in chrome, but this is definitely possible to do since that's the behavior of the Gmail desktop notifications.</p>