Unreviewed.  Rolled Chromium DEPS to r177956.  Requested by
thakis_ via sheriffbot.

Patch by Sheriff Bot <webkit.review.bot@gmail.com> on 2013-01-21

* DEPS:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@140369 268f45cc-cd09-0410-ab3c-d52691b4dbfc