chromium/third_party/blink/web_tests/fast/loader/resources/submit-form-while-parsing-subframe.html

<form name="form" method="POST" action="about:blank"></form>
<script type="text/javascript">
if (window.testRunner) {
    testRunner.dumpAsText();
    testRunner.waitUntilDone();
}
document.forms.form.submit();
setTimeout("location='submit-form-while-parsing-success.html'", 0);
</script>