chrome/test/data/extensions/api_test/messaging/externally_connectable/sites/popup_opener.html

<!--
Copyright 2016 The Chromium Authors. All rights reserved.
Use of this source code is governed by a BSD-style license that can be
found in the LICENSE file.
-->
<script>
var url = location.href.replace('popup_opener.html', 'chromium.org.html');
window.open(url, '_blank');
</script>