chromium/content/test/data/navigation_controller/remove_blank_iframe_on_load.html

<html>
<head>
<script>
function removeFrame() {
  var f = document.getElementById("frame1");
  document.body.removeChild(f);
}
</script>
</head>
<body onload="removeFrame()">
  This page removes its blank iframe on load.<br>
  <iframe id="frame1"></iframe>
</body>
</html>