chromium/chrome/test/data/extensions/permissions_increase/updates.xml

<?xml version='1.0' encoding='UTF-8'?>
<gupdate xmlns='http://www.google.com/update2/response' protocol='2.0'>
  <app appid='pgdpcfcocojkjfbgpiianjngphoopgmo'>
    <updatecheck codebase='http://localhost/autoupdate/v2.crx' version='2' />
  </app>
</gupdate>