iframe-with-inner-frame-on-foreign-domain.html

<html>
<head>
    <script>
        function loaded() 
        {
            document.getElementsByTagName('h4')[0].innerHTML = document.domain;
            if (top.opener)
                top.opener.postMessage("iframe-with-inner-frame-on-foreign-domain-LOADED", "*");
        }
    </script>
</head>
<body onload="loaded();">
    <h4>DOMAIN</h4>
    <iframe name="targetFrame" src="http://localhost:8000/security/resources/cross-frame-iframe.html"></iframe>
</body>
</html>

chromium/third_party/blink/web_tests/http/tests/security/frameNavigation/resources/iframe-with-inner-frame-on-foreign-domain.html