NTP/Apps: Change the order of the default apps.
NTP/Apps: Change the order of the default apps.

Use a list of pairs instead of using a map so that the insertioj order is kept.

BUG=3995
TEST=Start chrome with --enable-apps. The Gmail app should come up first in the list.

Review URL: http://codereview.chromium.org/2754008

git-svn-id: http://src.chromium.org/svn/trunk/src@49486 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: acd84c1b386b9d61b13363e629115ab0cadef1c1
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