chromium/chrome/test/data/ssl/page_runs_insecure_content.html

<html>
<head><title>Page that runs insecure content</title></head>
<body>
This page contains an script which is served over an http connection,
causing insecure content (when this page is loaded over https).<br>
<script src="http://does-not-exist.test/ssl/randomize_hash.js"></script>
</body>
</html>