chromium/src/third_party/blink/web_tests/fast/table/038-vertical.html - manifest_repos/chromium_src - Git at Google

 <body style="overflow: hidden;">
 The two rows below should look identical.  In both, the spanning cells in columns 2-3 should consume as
 much width as possible, while column 1 should be tiny.

 <table border=2 height=100% style="-webkit-writing-mode: vertical-rl;">
         <tr>
             <td>1<td colspan=2>2-3
         </tr>
         <tr>
             <td>1</td>
             <td colspan=2 height=100%>2-3</td>
         </tr>
     </table>
 </body>
	<body style="overflow: hidden;">
	The two rows below should look identical. In both, the spanning cells in columns 2-3 should consume as
	much width as possible, while column 1 should be tiny.

	<table border=2 height=100% style="-webkit-writing-mode: vertical-rl;">
	<tr>
	<td>1<td colspan=2>2-3
	</tr>
	<tr>
	<td>1</td>
	<td colspan=2 height=100%>2-3</td>
	</tr>
	</table>
	</body>