<!DOCTYPE html>

<html>
<head>
    <style>
        body {
            -webkit-perspective: 500px;
            -webkit-perspective-origin: top left;
        }
        
        .box {
            height: 100px;
            width: 100px;
            margin-bottom: -20px;
            background-color: silver;
            border: 1px solid black;
        }
    </style>
    <script>
        if (window.testRunner)
            testRunner.dumpAsText();

        function doTest()
        {
            if (window.internals)
                document.getElementById('layers').innerText = internals.layerTreeAsText(document, internals.LAYER_TREE_INCLUDES_VISIBLE_RECTS)
        }
        window.addEventListener('load', doTest, false);
    </script>
</head>
<body>
    <div class="box" style="-webkit-transform: translateZ(-200px)"></div>
    <div class="box" style="-webkit-transform: translateZ(-100px)"></div>
    <div class="box" style="-webkit-transform: translateZ(0)"></div>
    <div class="box" style="-webkit-transform: translateZ(50px)"></div>
    <div class="box" style="-webkit-transform: translateZ(100px)"></div>
    <div class="box" style="-webkit-transform: translateZ(150px)"></div>
<pre id="layers"></pre>
</body>
</html>