<!DOCTYPE html>

<html>
<head>
  <style type="text/css" media="screen">
    body { background-color:silver }
    
    .box {
        height: 200px;
        width: 200px;
        margin: 10px;
        padding: 5px;
        background-color: blue;
    }
    
    .composited {
      -webkit-transform: translateZ(0);
    }

  </style>
  <script type="text/javascript" charset="utf-8">
    function doTest()
    {
      window.setTimeout(function() {
        document.getElementById('test').className = 'composited box';
        parent.testDone();
      }, 50);
    }
    window.addEventListener('load', doTest, false);
  </script>
</head>
<body>

    <div id="test" class="box">
    </div>

</body>
</html>