Remove CSS Regions performance tests

Remove CSS Regions performance tests

CSS Regions code has been removed in r167275 so these performance tests
do not work anymore.

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=169593

[ojan, 2014-03-19 22:06:47]

lgtm

[commit-bot: I haz the power, 2014-03-19 22:06:52]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/rego@igalia.com/205323003/1

[commit-bot: I haz the power, 2014-03-19 22:49:28]

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

[commit-bot: I haz the power, 2014-03-19 22:49:29]

Try jobs failed on following builders:
  tryserver.blink on win_blink_rel

[Manuel Rego, 2014-03-19 22:55:11]

The CQ bit was checked by rego@igalia.com

[commit-bot: I haz the power, 2014-03-19 22:55:19]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/rego@igalia.com/205323003/1

[commit-bot: I haz the power, 2014-03-19 23:40:04]

Change committed as 169593