chromium/components/test/data/subresource_filter/window_stop_loads_disallowed_resource.html

<html>
<body>
<iframe src="/slow?100" id="iframe"></iframe>
<script>
  // slow takes 100 seconds to load, plenty of time to overwrite the
  // provisional load.
  iframe = document.getElementById("iframe");
  iframe.contentWindow.stop();
  iframe.contentDocument.body.innerHTML = ("Rewritten."
    + " <img src='/ad_tagging/pixel.png?ad=true'"
    + " onload='parent.document.title = \"loaded\";'"
    + " onerror='parent.document.title = \"failed\";'>");
</script>
</body>
</html>