<html>
<head>
  <style>
    #grandparent {
      width: 600px;
      height: 500px;
      border: none;
    }
  </style>
</head>
<body>
  <div>
    <iframe id="grandparent" src="resources/scrollgrandchild-grandparent.html"></iframe>
  </div>
</body>
</html>