Log in stub user only if not showing login screen.

Log in stub user only if not showing login screen.
On running ChromeOS_Chrome on Linux, we log in a stub user; this is however only necessary if we aren't doing a command line login or showing the login screen to the user. On arbitarily logging in the stub user, Chrome thinks that a user is logged in even if the login screen is showing, causing all sorts of issues.


R=nkostylev@chromium.org,pastarmovj@chromium.org
BUG=None
TEST=Tested on Linux with a regular login using the login manager, a stub-login (default when not using the login manager) and a kiosk-mode login.


Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=128251

[pastarmovj, 2012-03-22 09:26:58]

lgtm, but please before committing this run try bots at least
linux_chromeos,linux,linux_chromeos_clang,cros_x86.

[Nikita (slow), 2012-03-22 11:32:30]

lgtm

May as well remove Zel's short-term fix
https://chromiumcodereview.appspot.com/9812039/

[zel, 2012-03-22 15:56:19]

lgtm

[commit-bot: I haz the power, 2012-03-22 16:43:25]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/rkc@chromium.org/9811031/1

[commit-bot: I haz the power, 2012-03-22 18:16:39]

Change committed as 128251