Mac compile warning fix for r52670. TEST=NONE BUG=NONE
Mac compile warning fix for r52670.
TEST=NONE
BUG=NONE

Review URL: http://codereview.chromium.org/3027002

git-svn-id: http://src.chromium.org/svn/trunk/src@52673 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 327b8a33a5100f978027116cae8c3f466cd3b080
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