<html>
  <head>
    <style>
      body {
        overflow: hidden;
        background-color: green;
      }
      iframe {
        position: absolute;
        width: 400px;
        height: 400px;
        left: 0px;
        top: 200px;
        border: 0px;
      }
    </style>
    <script>
      function runTest() {
        var iframe = document.getElementsByTagName("iframe")[0];
        iframe.contentWindow.scrollTo(0, 250);
      }
      if (window.testRunner)
        testRunner.dumpAsText(true);
      window.addEventListener("load", runTest, false);
    </script>
  </head>
  <body>
    <iframe src="resources/has-composited-iframe-child.html"></iframe>
  </body>
</html>