chromium/chrome/test/data/iframe_cross_site_with_script.html

<html><head><title>cross-site iframe with script test</title></head>
<body>
<!-- This only works if the CrossSiteRedirector is running on the embedded test
     server, and the host_resolver is set up to handle b.test. -->
<iframe src="/cross-site/b.test/iframe_blob.html" id="frame1"></iframe>
</body></html>