GitLab

This reverts commit b5418f5c.

Reason for revert: FindIt says it's 74% confident that it's breaking KioskTest.LaunchAppUserCancel on linux cros.

https://findit-for-me.appspot.com/waterfall/failure?url=https://build.chromium.org/p/chromium.chromiumos/builders/linux-chromeos-rel/builds/16574

Original change's description:
> Run ClearSigninProfile on user session start
> 
> Also, ClearSigninProfile now closes any browser window opened in the
> profile. Ideally, no browsers would be open in the sign-in profile, but
> we've had cases where that had happened.
> 
> BUG=906837,901768
> 
> Change-Id: Ia231d2ce3420c5c743bcd17f839ad00f4a851874
> Reviewed-on: https://chromium-review.googlesource.com/c/1347105
> Reviewed-by: Jacob Dufault <jdufault@chromium.org>
> Reviewed-by: Alexander Alekseev <alemate@chromium.org>
> Commit-Queue: Toni Baržić <tbarzic@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#611442}

TBR=tbarzic@chromium.org,achuith@chromium.org,alemate@chromium.org,jdufault@chromium.org

Change-Id: I3f497a9076e926be8d28110f051685edb27e8f7e
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 906837, 901768
Reviewed-on: https://chromium-review.googlesource.com/c/1352121Reviewed-by: Darren Shen <shend@chromium.org>
Commit-Queue: Darren Shen <shend@chromium.org>
Cr-Commit-Position: refs/heads/master@{#611544}