<!DOCTYPE html>

<html>
<head>
    <style>
        #box {
            margin: 10px;
            width: 200px;
            height: 2500px;
            background-color: silver;
            -webkit-transform: translateZ(0);
        }
        
        #box.empty .content {
            display: none;
        }
    </style>
    <script>
        if (window.testRunner)
            testRunner.waitUntilDone();

        function doTest()
        {
            if (window.internals)
                window.internals.layerTreeAsText(document); // Force layer update.

            document.getElementById('box').classList.remove('empty');
            if (window.testRunner)
                testRunner.notifyDone();
        }
        window.addEventListener('load', doTest, false);
    </script>
</head>
<body>
    <div id="box" class="empty">
        <div class="content">
            Here is some text.
        </div>
    </div>
</body>
</html>