background-color-change-to-text.html

<!DOCTYPE>
<html>
<head>
<style type="text/css" media="screen">
    #background {
        width: 200px;
        height: 200px;
        display: block;
        background-color: green;
    }
    .blue {
        width: 50px;
        height: 50px;
        background-color: blue;
        display: block;
    }

    .composited {
        will-change: transform;
    }
</style>
<script type="text/javascript" charset="utf-8">
    if (window.testRunner)
        testRunner.waitUntilDone();
    function doTest()
    {
        var bg = document.getElementById("background");

        window.setTimeout(function() {
            // Change the layer not to be background color layer.
            bg.innerHTML = "text" + bg.innerHTML;
            bg.style.backgroundColor = "red";
            if (window.testRunner) {
                window.setTimeout(function() {
                    testRunner.notifyDone();
                }, 0);
            }
        }, 0);
    }

    window.addEventListener('load', doTest, false);
</script>
</head>
<body>
<div id="background" class="composited">
    <div class="blue composited">
    </div>
</div>
</body>
</html>

chromium/third_party/blink/web_tests/compositing/background-color/background-color-change-to-text.html