iframe_redirect.html | Explore in Territory

<html>
  <body>
    <iframe id='ifr' name='ifr'>
    </iframe>
    <script>
      var ifr = document.getElementById('ifr');
      ifr.contentWindow.document.location = "visible_iframe.html";
    </script>
  </body>
</html>

chromium/third_party/blink/renderer/core/testing/data/iframe_redirect.html