chromium/third_party/blink/web_tests/fast/text-autosizing/clusters-sufficient-width.html

<!DOCTYPE html>
<html>
<head>

<meta name="viewport" content="width=800">
<style>
html { font-size: 16px; }
body { width: 800px; margin: 0; overflow-y: hidden; }
</style>

<script src="resources/autosizingTest.js"></script>

</head>
<body>

<div style="position: absolute; overflow: auto; width: 400px">
    This text should be autosized to 20px computed font size (16 * 400/320), since the position:absolute causes this to be a new cluster.
</div>

<div style="margin-top: 100px; float: left; width: 420px">
    This text should be autosized to 21px computed font size (16 * 420/320), since the float:left causes this to be a new cluster.
</div>

<table cellspacing="0" cellpadding="0">
    <tr>
        <td style="width: 380px;">
            This text should be autosized to 19px computed font size (16 * 380/320), since being a table cell causes this to be a new cluster.
        </td>
    </tr>
</table>

<div style="-webkit-writing-mode: vertical-rl; height: 440px">
    This text should be autosized to 22px computed font size (16 * 440/320), since the perpendicular writing-mode compared to its containing block causes this to be a new cluster. Unfortunately due to <a href="https://bugs.webkit.org/show_bug.cgi?id=96557">http://webkit.org/b/96557</a> the height:440px is incorrectly interpreted as constraining the logicalHeight, so it doesn't get autosized.
</div>

</body>
</html>