The first run sentinel does not get created for system install - Vista case mostly if user has UAC enabled - The sentinel path is not writeable if you are not elevated so   first run keeps happening every time.
The first run sentinel does not get created for system install
- Vista case mostly if user has UAC enabled
- The sentinel path is not writeable if you are not elevated so
  first run keeps happening every time.

BUG=1503885

Review URL: http://codereview.chromium.org/12650

git-svn-id: http://src.chromium.org/svn/trunk/src@5994 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: e232a77837d937cb4e2c4d3ca8c05cbd3be84bf8
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