chromium/third_party/blink/web_tests/compositing/rtl/rtl-iframe-absolute.html

<html>
<head>
<style>
    body {
        overflow: hidden;
    }

    iframe {
        position: absolute;
        top: 0px;
        left: 0px;
        width: 400px;
        height: 400px;
        border: none;
    }
</style>
<script>
    function doTest() {
        if (window.testRunner && window.internals) {
            testRunner.setCustomTextOutput(internals.layerTreeAsText(document));
            testRunner.dumpAsTextWithPixelResults();
        }
    }
    window.addEventListener('load', doTest, false);
</script>
<body>
    <iframe src="rtl-absolute.html"></iframe>
</body>
</html>