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 the Win x64 debug build: 'GetRestrictedTokenHandle' : is not a member of 'sandbox::RestrictedToken'

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

[dcheng, 2015-07-16 22:10:06]

Created Revert of Sandbox: Make CreateRestrictedToken return a ScopedHandle.

[commit-bot: I haz the power, 2015-07-16 22:10:51]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1231853005/1

[commit-bot: I haz the power, 2015-07-16 22:13:51]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-07-16 22:13:53]

Failed to apply the patch.

[commit-bot: I haz the power, 2015-07-16 22:15:27]

The CQ bit was unchecked by commit-bot@chromium.org