<!DOCTYPE html>
<script>
  function go() {
      var doc = document.getElementById("testFrame").contentWindow.document;
      doc.open();
      doc.close();
      doc.body.innerText = "passed";
  }
</script>
<body onload="setTimeout(opener.pageLoaded);">
The iframe below should not be blank after a reload.<br>
<iframe src="about:blank" id="testFrame"></iframe>
<script>
  go();
</script>
