Revert of Move token handle obtaining to UserSessionManager

Revert of Move token handle obtaining to UserSessionManager (patchset #1 id:1 of https://codereview.chromium.org/1129293004/)

Reason for revert:
most likely culprit for interactive ui test failures here: https://build.chromium.org/p/chromium.chromiumos/builders/Linux%20ChromiumOS%20Tests%20%281%29/builds/2847

Original issue's description:
> Move token handle obtaining to UserSessionManager
>
> BUG=484690, 484734
> R=nkostylev@chromium.org
>
> Committed: https://crrev.com/71ede7fdaf6404ec0f70a60d60f679fee07902a9
> Cr-Commit-Position: refs/heads/master@{#329868}

TBR=nkostylev@chromium.org,antrim@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=484690, 484734
Committed: https://crrev.com/55c68a9a9aecbdc22fd06a99aa93b98881405d88
Cr-Commit-Position: refs/heads/master@{#329891}

[Evan Stade, 2015-05-14 19:00:50]

Created Revert of Move token handle obtaining to UserSessionManager

[commit-bot: I haz the power, 2015-05-14 19:02:23]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1140823007/1

[commit-bot: I haz the power, 2015-05-14 19:08:03]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-05-14 19:09:55]

Patchset 1 (id:??) landed as
https://crrev.com/55c68a9a9aecbdc22fd06a99aa93b98881405d88
Cr-Commit-Position: refs/heads/master@{#329891}

[Evan Stade, 2015-05-14 19:45:05]

On 2015/05/14 19:09:55, I haz the power (commit-bot) wrote:
> Patchset 1 (id:??) landed as
> https://crrev.com/55c68a9a9aecbdc22fd06a99aa93b98881405d88
> Cr-Commit-Position: refs/heads/master@{#329891}

also broken: OobeSuite_OobeTest.NewUser

http://build.chromium.org/p/chromium.chromiumos/builders/Linux%20ChromiumOS%2...