chromium/src/third_party/blink/web_tests/tables/mozilla/core/col_widths_fix_autoPer.html

fixed table - 0 percentage width cell is not honored to min
<table width=300 border>
 <tr>
  <td width=0%>foo</td>
  <td>foo</td></tr>
</table>
<BR>
fixed table - too small a percentage width cell is honored to min
<table width=300 border>
 <tr>
  <td width=2%>foo</td>
  <td>foo</td></tr>
</table>
<BR>
fixed table - percentage cell width includes padding
<table border width=300 cellpadding=20>
 <tr>
  <td width=50%>cell=50%</td>
  <td>cell=auto</td></tr>
</table>
<BR>
<table border width=300>
 <tr>
  <td width=50%>cell=50%</td>
  <td>cell=auto</td></tr>
</table>
<BR>
fixed table - % cells don't get expanded
<table width=200 border>
 <tr>
  <td width=25%>25%</td>
  <td width=25%>25%</td>
  <td>auto</td></tr>
</table>
<BR>
fixed table - % cells are honored
<table width=200 border>
 <tr>
  <td width=50%>50% 50% 50%</td>
  <td>auto</td></tr>
</table>