Add layout test for table repainting.

Add layout test for table repainting.

When the background of the table row is changed we repaint the entire table.
This CL adds a layout test showing the issue.

BUG=357291
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=170221

[dsinclair, 2014-03-27 21:13:46]

PTAL. This adds a simple layout test to show the repaint issue.

[esprehn, 2014-03-27 21:15:09]

lgtm

[commit-bot: I haz the power, 2014-03-27 21:15:13]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/dsinclair@chromium.org/214513008/1

[commit-bot: I haz the power, 2014-03-27 22:33:07]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-03-27 22:33:07]

Commit queue rejected this change because the description was changed
between the time the change entered the commit queue and the time it
was ready to commit. You can safely check the commit box again.

[esprehn, 2014-03-27 22:37:09]

The CQ bit was checked by esprehn@chromium.org

[commit-bot: I haz the power, 2014-03-27 22:38:35]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/dsinclair@chromium.org/214513008/1

[commit-bot: I haz the power, 2014-03-27 23:41:53]

Change committed as 170221