ancestor-throttle-nested.https.html

<!DOCTYPE html>
<html>
<script src="utils.js"></script>
<title>Header Inheritance CSP Reporting Page</title>
<body>
<script>
// This file is embedded in an iframe by ancestor-throttle-inner.https.html
// which in turn has been embedded in a fenced frame by
// ancestor-throttle.https.html. This in turn will load a same-origin iframe.
async function init() {
  const url = new URL(location.href);
  const embed_url = generateURL(url.searchParams.get("nested_url"),
      parseKeylist());
  const iframe = document.createElement('iframe');
  iframe.src = embed_url;
  document.body.append(iframe);
}

init();
</script>
</body>
</html>

chromium/third_party/blink/web_tests/external/wpt/fenced-frame/resources/ancestor-throttle-nested.https.html