Fix and re-enable "early restart" feature on ChromeOS.

Fix and re-enable "early restart" feature on ChromeOS.

1) Early restart is disabled in "Chrome for ChromeOS" desktop build.
2) Ignore signin profile.

The first change simplifies development.
The second fixes the problem "user session cannot be ended if both
owner and current user both have (different) flags set."

BUG=391357
TEST=none

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=281989

[Alexander Alekseev, 2014-07-08 18:28:13]

Please review.

[Nikita (slow), 2014-07-09 04:04:08]

lgtm

https://codereview.chromium.org/378893003/diff/1/chrome/browser/chromeos/logi...
File chrome/browser/chromeos/login/login_utils.cc (right):

https://codereview.chromium.org/378893003/diff/1/chrome/browser/chromeos/logi...
chrome/browser/chromeos/login/login_utils.cc:124: if
(!base::SysInfo::IsRunningOnChromeOS())
FYI we can emulate that at least somehow since Guest mode that  requires restart
as well is supported on desktop.

[commit-bot: I haz the power, 2014-07-09 04:07:22]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/alemate@chromium.org/378893003/1

[commit-bot: I haz the power, 2014-07-09 05:53:45]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  android_dbg_triggered_tests on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/android_dbg_triggered...)
  mac_chromium_rel on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/mac_chromium_rel/buil...)

[commit-bot: I haz the power, 2014-07-09 07:38:01]

Change committed as 281989