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chromium/chrome/test/data/extensions/platform_apps/url_handlers/handlers/simple/main.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>
<body>
  <div>I'm a URL handler. I've been launched with:</div>
  <div><a id='link' href='about:blank' target='_blank'></a><div>
</body>
</html>