title: How to reset asking for permission for chrome desktop notification
body: <p><code>window.webkitNotifications.requestPermission()</code> <em>originally</em> showed the prompt to the user asking them to <code>Allow</code> or <code>Deny</code>. At one point, when my notification showed up, I clicked on the little wrench and then <code>Disable from http://example.com</code> option.</p>
  
  <p>Then, <code>window.webkitNotifications.requestPermission()</code> no longer prompted me. Did I permanently stop my site from receiving or even allowing to request for permission? I even went into Chrome settings and opted in for "allow notifications from all sites."</p>
  
  <p>How can I get that prompt to show up again? Currently, <code>.checkPermission()</code> is <code>1</code>, and I want to make it <code>0</code> again.</p>