predictor_cross_site_subframe_nav.html

<!DOCTYPE html>
<p>
This page loads an empty cross-site iframe, and exposes a method to navigate it.
</p>
<script>
function getFrameDocument() {
  return window.frames['iframe'].contentWindow.document;
}

function notifyLoaded() {
  window.domAutomationController.send(true);
}

function navigateSubframe(url) {
  var iframe = document.createElement('iframe');
  iframe.onload = notifyLoaded;
  iframe.src = url;
  document.body.appendChild(iframe);
}
</script>

chromium/chrome/test/data/predictor/predictor_cross_site_subframe_nav.html