chromium/third_party/blink/web_tests/fast/parser/document-write-onload-clear.html

<script>
if (window.testRunner)
    testRunner.dumpAsText();
</script>
<iframe onload="document.write('<p>FAIL<iframe onload=&quot;document.write(\'<p>\')&quot;></iframe><script>document.body.innerHTML = \'PASS\';</script>');document.close();"></iframe>