<!DOCTYPE html>

<html>
<head>
  <style>
    .fixed {
      position: fixed;
      width: 50px;
      height: 50px;
    }
    
    .absolute {
        position: absolute;
        top: 40px;
        left: 40px;
        height: 100px;
        width: 100px;
        background-color: gray;
    }
  </style>

  <script type="text/javascript">
    if (window.internals)
      window.internals.settings.setAcceleratedCompositingForFixedPositionEnabled(true);

    if (window.testRunner) {
      testRunner.dumpAsText();

      window.addEventListener("load", function() {
        document.getElementById("layertree").innerText = window.internals.layerTreeAsText(document);
      }, false);
    }
  </script>
</head>

<body>
  <div style="height: 1000px">
    <p>There should be no layers.</p>
    <pre id="layertree"></pre>
  </div>

  <!-- This should not be composited -->
  <div class="fixed" style="top: 10px; left: 10px"></div>
  <!-- And this should not be promoted into a layer -->
  <div class="absolute"></div>
</body>
</html>