Revert of Sandbox: Make CreateRestrictedToken return a ScopedHandle.

Revert of Sandbox: Make CreateRestrictedToken return a ScopedHandle. (patchset #2 id:20001 of https://codereview.chromium.org/1232963002/)

Reason for revert:
Broke a bot: http://build.chromium.org/p/chromium.win/builders/Win%20x64%20Builder%20%28dbg%29/builds/10671

Original issue's description:
> Sandbox: Make CreateRestrictedToken return a ScopedHandle.
>
> Removes raw handles from the API.
>
> BUG=426577
>
> Committed: https://crrev.com/9808175ad322e8387366cdec088e65ccb934ceac
> Cr-Commit-Position: refs/heads/master@{#339130}

TBR=wfh@chromium.org,rvargas@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=426577
Committed: https://crrev.com/124f117e5e137d5bedfb0e7e5b9055a4a995fc8c
Cr-Commit-Position: refs/heads/master@{#339140}

[Nico, 2015-07-16 22:10:19]

Created Revert of Sandbox: Make CreateRestrictedToken return a ScopedHandle.

[commit-bot: I haz the power, 2015-07-16 22:10:55]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1240793004/1

[commit-bot: I haz the power, 2015-07-16 22:13:31]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-07-16 22:14:27]

Patchset 1 (id:??) landed as
https://crrev.com/124f117e5e137d5bedfb0e7e5b9055a4a995fc8c
Cr-Commit-Position: refs/heads/master@{#339140}