<!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);
        }

        .box {
            position: relative;
            height: 40px;
            width: 100px;
            background-color: rgba(0, 0, 128, 0.5);
        }

        p {
            line-height: 20px;
        }

        .composited {
            will-change: transform;
        }

        .antialiased {
            -webkit-font-smoothing: antialiased;
        }

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

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

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

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

<div class="composited container" style="visibility:hidden">
    This text is hidden.
    <div style="position: relative; visibility: visible;">
        <p>Visibility hidden ancestor with visible child</p>
    </div>
</div>

<div class="composited container">
    <div style="position: relative; visibility: hidden;">
        <p>Hidden child with text</p>
    </div>
</div>

<div class="composited container" style="visibility:hidden">
    <p class="smoothed">This text is hidden.</p>
    <div style="position: relative; visibility: visible;">
        <p class="antialiased">Only visible text is antialiased</p>
    </div>
</div>

<div class="composited container">
    <p class="antialiased">This text is antialiased. There is a hidden smoothed child</p>
    <div style="position: relative; visibility: hidden;">
        <p class="smoothed">This smoothed text is hidden</p>
    </div>
</div>

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

</body>
</html>