chromium/chrome/browser/page_load_metrics/integration_tests/data/render_blocking_resource_and_slow_preloaded_font.html

<!doctype html>
<html>
  <head>
    <script src="/common/media.js"></script>
    <script>
      // There's no way to load slow resources in browser tests, so we start
      // the preload later.
      const preload_font = () => {
        const link = document.createElement("link");
        link.href = "/fonts/AD.woff";
        link.rel = "preload";
        link.as = "font";
        link.crossOrigin = true;
        document.head.appendChild(link);
      }
      setTimeout(preload_font, 1000);
    </script>
  </head>
</html>