<!-- webkit-test-runner [ useThreadedScrolling=false ] -->
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
   "http://www.w3.org/TR/html4/loose.dtd">

<html lang="en">
<head>
  <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
  <title>Composited scrolling creates a stacking context.</title>
  <style type="text/css" media="screen">
    .container {
      width: 200px;
      height: 200px;
      overflow: scroll;
      margin: 20px;
      border: 1px solid black;
    }

    .composited {
      width: 200px;
      height: 150px;
      -webkit-transform: translateZ(0);
      background-color: green;
    }

    .not-composited {
      width: 200px;
      height: 150px;
      background-color: blue;
    }

    .in-flow-positioned {
      position: relative;
      display: block;
    }

    .fixed {
      z-index: -1;
      position: absolute;
      width: 200px;
      height: 300px;
      background-color: red;
    }
  </style>
  <script type="text/javascript" charset="utf-8">
    if (window.testRunner)
      testRunner.dumpAsText();

    if (window.internals)
      window.internals.settings.setAcceleratedCompositingForOverflowScrollEnabled(true);

    function doTest()
    {
      document.body.offsetTop;

      if (window.internals) {
        var layerTree = window.internals.layerTreeAsText(document);
        var pre = document.getElementById('console');
        var text = document.createTextNode(layerTree + '\n');
        pre.appendChild(text);
      }
    }

    window.addEventListener('load', doTest, false);
  </script>
</head>
<body>
  <div class="container">
    <div class="in-flow-positioned">
      <div class="fixed"></div>
    </div>
    <div class="composited"></div>
    <div class="not-composited"></div>
  </div>
  <pre id="console"></pre>
</body>
</html>