Issue 409155: writing-mode doesn't work on th or td
Bug 1166120: Shrink-to-fit width calculates to zero when children are in orthogonal vertical flow
Bug 65917: Applying writing-mode:vertical-rl to td does not make the table cell vertical
Actual (live) results in your browser:
<th>
<td>
Expected results:
<td>
<th>