manpage: fix user-data-dir example path
manpage: fix user-data-dir example path

The fact that we have this weird vestigal "Default" directory
is really confusing.  :(

Review URL: http://codereview.chromium.org/3014028

git-svn-id: http://src.chromium.org/svn/trunk/src@53828 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 5a5bef09b8b325c86d0318ac3337279387fdf11e
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