ad-highlight-fenced-frame.https.html

<!DOCTYPE html>
<html>
<body>
  <fencedframe
      style="width: 100px; height: 200px;">
  </fencedframe>
  <script type="text/javascript">
    const url = new URL("resources/ad-highlight.php", location.href);
    document.querySelector("fencedframe").config = new FencedFrameConfig(url);
    if (window.testRunner)
      testRunner.waitUntilDone();
  </script>
</body>
</html>

chromium/third_party/blink/web_tests/http/tests/fenced_frame/ad-highlight-fenced-frame.https.html