chromium/third_party/blink/web_tests/fast/dom/Window/resources/child-opens-window.html

<html>
 <head>
  <script>
    var result = window.open('data:text/html;charset=utf-8,<html><body>PASS</body></html>');
    window.top.opened(result);
  </script>
 </head>
</html>