chromium/third_party/blink/web_tests/external/wpt/service-workers/service-worker/resources/fetch-request-html-imports-iframe.html

<script src="/common/get-host-info.sub.js"></script>
<script type="text/javascript">
  var hostInfo = get_host_info();
  var makeLink = function(id, url) {
      var link = document.createElement('link');
      link.rel = 'import'
      link.id = id;
      link.href = url;
      document.documentElement.appendChild(link);
    };
  makeLink('same', hostInfo.HTTPS_ORIGIN + '/sample-dir/same.html');
  makeLink('other', hostInfo.HTTPS_REMOTE_ORIGIN + '/sample-dir/other.html');
</script>