<!DOCTYPE html>

<html>
<head>
    <style>
        .container {
            height: 150px;
            width: 150px;
            float: left;
            position: relative;
            border: 1px solid black;
            padding: 20px;
            margin: 10px;
            box-sizing: border-box;
            box-shadow: 0 0 4px rgba(0, 0, 0, 0.2);
        }
        
        .container div {
            border: 1px solid rgba(0, 0, 0, 0.5);
            padding: 2px;
        }
        
        .inner {
            float: left;
        }

        .composited {
            will-change: transform;
        }

        .antialiased {
            -webkit-font-smoothing: antialiased;
        }
    </style>
    <script>
        if (window.testRunner)
            testRunner.dumpAsText();

        if (window.internals) {
            internals.setFontSmoothingEnabled(true);
            internals.settings.setSubpixelAntialiasedLayerTextEnabled(true)
        }

        function createContainer(maxDepth, leafSiblings)
        {
            var container = document.createElement('div');
            container.className = 'composited antialiased container';
            
            var parent = container;

            for (var depth = 0; depth < maxDepth; ++depth) {
                var innerDiv = document.createElement('div');
                parent.appendChild(innerDiv);
                parent = innerDiv;
            }

            for (var breadth = 0; breadth < leafSiblings; ++breadth) {
                var child = document.createElement('div');
                child.className = 'inner';
                child.textContent = breadth;
                parent.appendChild(child);
            }
            
            return container;
        }

        function createContainers()
        {
            document.body.appendChild(createContainer(1, 99));
            document.body.appendChild(createContainer(1, 100));
            document.body.appendChild(createContainer(198, 1));
            document.body.appendChild(createContainer(200, 1));
        }

        function doTest()
        {
            createContainers();

            if (window.internals)
                document.getElementById('layers').innerText = internals.layerTreeAsText(document);
        }

        window.addEventListener('load', doTest, false);
    </script>
</head>
<body>

<pre id="layers"></pre>

</body>
</html>