<script src="/common/PrefixedPostMessage.js"></script>
<script>
var prefixedMessage = new PrefixedMessageResource();
var max = 150, attempts = 0;
function sendCoordinates() {
  // Certain windowing systems position windows asynchronously.
  // As a result, the window may not be positioned yet when the
  // load event fires. To accommodate this, allow waiting up to
  // 15 seconds for positioning to take place.
  if (!window.screenX && !window.screenY && ++attempts < max) {
    setTimeout(sendCoordinates, 100);
    return;
  }
  prefixedMessage.postToOpener({
    left: window.screenX,
    top: window.screenY,
    width: window.innerWidth,
    height: window.innerHeight
  });
}
window.addEventListener('load', sendCoordinates);
</script>