chromium/third_party/blink/web_tests/paint/invalidation/table/composited-table-background-col-span-initial-empty.html

<!doctype html>
<script src="../resources/text-based-repaint.js"></script>
<script>
function repaintTest() {
  target.style.backgroundColor = 'lightBlue';
}
onload = runRepaintAndPixelTest;
</script>
<style>
td {
  padding: 0 24px;
  height: 64px;
}
</style>
Test passes if all of the cells in the second and third columns of the table have a blue background.
<table>
  <colgroup>
    <col>
    <col id="target" span="2">
  </colgroup>
  <tr>
    <td>A</td>
    <td>B</td>
    <td>C</td>
  </tr>
  <tr>
    <td>D</td>
    <td style="will-change: transform">E</td>
    <td style="will-change: transform">F</td>
  </tr>
</table>