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chromium/third_party/blink/web_tests/http/tests/xmlhttprequest/resources/noContentLength.asis 

<html>
<head>
<title>This page does not provide any content length</title>
</head>
<body>
<h1> Link to
<a href="http://webkit.org">WebKit's</a> site.
</h1>
</body>
</html>