chromium/chrome/test/data/extensions/platform_apps/web_view/addremove/guest.html

<!--
Copyright 2013 The Chromium Authors
Use of this source code is governed by a BSD-style license that can be
found in the LICENSE file.
-->
<html>
<head>
</head>
<body>
Add remove webview test guest.

<script>
window.addEventListener('message', function(e) {
  window.console.log('post message received.');
  e.source.postMessage('connected', '*');
});
</script>
</body>
</html>