gtk+ : Gimp ToolKit + ( http://www.gtk.org/ )
libdrm-tests : X.Org libdrm library ( http://dri.freedesktop.org/ )
libpciaccess : Library providing generic access to the PCI bus and devices ( )
libva-intel-driver : HW video decode support for Intel integrated graphics ( http://www.freedesktop.org/wiki/Software/vaapi )
pango : Internationalized text layout and rendering library ( http://www.pango.org/ )
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