title: Google Chrome webkit notifications revoke permission? Toggle on/off?
body: <p>I have webkit notifications working perfectly but I'd like to allow the user the option to switch them off should they find them annoying.</p>
  
  <p>I've searched the API but can't find anything to do with revoking the permission.</p>
  
  <p>Basically something that would look like the following...</p>
  
  <pre><code>&lt;input type="button" onclick="window.webkitNotifications.requestPermission();" value="Yes" /&gt;
  &lt;input type="button" onclick="window.webkitNotifications.revokePermission();" value="No" /&gt;
  </code></pre>