Remove a now-unnecessary warning suppression.
Remove a now-unnecessary warning suppression.

Can't be checked in until we pick up WebKit r46814, as that's the upstream fix.

BUG=none
TEST=none
Review URL: http://codereview.chromium.org/164004

git-svn-id: http://src.chromium.org/svn/trunk/src@22587 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 6c406514ee3d2f4a62f06fc0b1910da6a23c9455
meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser