pam_pwdfile : PAM module for authenticating against passwd-like files. ( http://cpbotha.net/pam_pwdfile.html )
pambase : PAM base configuration files ( http://www.gentoo.org/proj/en/base/pam/ )
polkit : Policy framework for controlling privileges for system-wide services ( http://hal.freedesktop.org/docs/polkit/ )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a chromiumos
For Paludis use this rsync : rsync://gentoo.zugaina.org/chromiumos-portage
If you have a problem : ycarus(-at-)zugaina.org