Code cleanup for showValidationMessage

Code cleanup for showValidationMessage

Removing showValidationMessage, as code on the chromium side has landed.

R=tkent@chromium.org
BUG=91638
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=181697

[Habib Virji, 2014-09-09 12:19:48]

Cleanup as code for Validation message, as chromium side changes has landed.

[tkent, 2014-09-09 23:22:48]

The CQ bit was checked by tkent@chromium.org

[tkent, 2014-09-09 23:22:48]

lgtm

[commit-bot: I haz the power, 2014-09-09 23:23:20]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/habib.virji@samsung.com/557753002/1

[commit-bot: I haz the power, 2014-09-10 01:14:30]

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

[commit-bot: I haz the power, 2014-09-10 01:14:31]

Try jobs failed on following builders:
  win_blink_rel on tryserver.blink
(http://build.chromium.org/p/tryserver.blink/builders/win_blink_rel/builds/26321)

[tkent, 2014-09-10 01:17:27]

The CQ bit was checked by tkent@chromium.org

[commit-bot: I haz the power, 2014-09-10 01:17:49]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/habib.virji@samsung.com/557753002/1

[commit-bot: I haz the power, 2014-09-10 03:01:02]

Committed patchset #1 (id:1) as 181697