Use new labs_section on about:labs
Use new labs_section on about:labs

BUG=53399
TEST=none
TBR=trungl

git-svn-id: http://src.chromium.org/svn/trunk/src@57917 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 07eea2bb65847c7d99fd3af98d70ec6d66481ede
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