Don't show the apps promo at all on Chrome OS
Don't show the apps promo at all on Chrome OS

BUG=62850
TEST=web store promo should never appear on Chrome OS

Review URL: http://codereview.chromium.org/4901001

git-svn-id: http://src.chromium.org/svn/trunk/src@65978 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 0f686bb315ef57c67e4be04594702e15dda053c9
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