[jkkm@chromebook-f19]~% DISPLAY=:0 gnome-shell --replace

(gnome-shell:2837): Gvc-WARNING **: Failed to connect context: Connection refused
      JS LOG: GNOME Shell started at Sat Jul 13 2013 22:02:00 GMT-0400 (EDT)
      JS LOG: Could not set property status on remote object /org/gnome/SessionManager/Presence: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name org.gnome.SessionManager was not provided by any .service files
LLVM ERROR: Not supported instr: %R3<def> = LEApcrel <cp#5>, pred:14, pred:%noreg

[jkkm@chromebook-f19]~%