<!DOCTYPE html>

<html>
<head>
    <style>
        body {
            margin: 0;
        }
        .box {
            height: 200px;
            width: 200px;
            background-color: silver;
            position: relative;
        }
        .composited {
            -webkit-transform: translateZ(0);
        }
        
        p {
            height: 12.345px; /* Subpixel height */
        }
    </style>
    <script>
        if (window.testRunner)
            testRunner.dumpAsText();

        function runTest()
        {
            if (window.testRunner)
              document.getElementById('layers').innerText = window.internals.layerTreeAsText(document);
        }
        window.addEventListener('load', runTest, false);
    </script>
</head>
<body>
<p>Here is some text</p>
<div class="composited box">
</div>
<div class="box">
</div>
<pre id="layers"></pre>
</body>
</html>