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

<html>
<head><title>Page that runs insecure content</title></head>
<body>
</body>
<script>
var s = document.createElement("script");
s.src = "http://different-http-host.test/ssl/randomize_hash.js";
document.body.appendChild(s);
</script>
</html>