Revert of Clean up Smart Lock cryptohome keys logic:

Revert of Clean up Smart Lock cryptohome keys logic: (patchset #5 id:80001 of https://codereview.chromium.org/808563004/)

Reason for revert:
Once this change landed chromeos file manager tests started failing across the MSAN bots.

This is the most likely culprit, so reverting speculatively. If this does not help will reland this change.

See http://build.chromium.org/p/chromium.memory.fyi/builders/Linux%20ChromeOS%20MSan%20Browser%20%282%29/builds/139

Original issue's description:
> Clean up Smart Lock cryptohome keys logic:
>
> 1. Queue all cryptohome keys operations.
> 2. Roll ClearRemoteDevices as a specific case of SetRemoteDevices
> 3. Introduce new RefreshKeys operation using the existing add and remove keys
>    operations to replace the current cryptohome keys with new keys.
> 4. After reauthenticating for setup, remove the old cryptohome keys.
>
> BUG=432996
>
> Committed: https://crrev.com/275152c34d8edc5346757288cfffe63444650faa
> Cr-Commit-Position: refs/heads/master@{#309094}

TBR=tbarzic@chromium.org,xiyuan@chromium.org,tengs@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=432996
Committed: https://crrev.com/8ffa00af2d4e322e91859c502aa02e0c9b0e1f2a
Cr-Commit-Position: refs/heads/master@{#309519}

[benwells, 2014-12-23 02:10:26]

Created Revert of Clean up Smart Lock cryptohome keys logic:

[commit-bot: I haz the power, 2014-12-23 02:11:33]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/789793005/1

[commit-bot: I haz the power, 2014-12-23 02:12:59]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-12-23 02:14:12]

Patchset 1 (id:??) landed as
https://crrev.com/8ffa00af2d4e322e91859c502aa02e0c9b0e1f2a
Cr-Commit-Position: refs/heads/master@{#309519}

[benwells, 2014-12-23 06:34:45]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.chromium.org/814153003/ by benwells@chromium.org.

The reason for reverting is: This didn't fix the problem, so reverting the
revert..