Fix MSVC warning.
Fix MSVC warning.

TBR=maruel
Review URL: http://codereview.chromium.org/18594

git-svn-id: http://src.chromium.org/svn/trunk/src@8627 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 5bac79a3ce269966dfa41a3d2ef673b92680707d
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