[Sync] Move sync's ModelSafeWorker implementations to engine/.

[Sync] Move sync's ModelSafeWorker implementations to engine/.

PassiveModelWorker already lives in engine/; BrowserThreadModelWorker
and UIModelWorker should too. This unblocks moving SyncBackendRegistrar
to engine/ as well.

BUG=631271, 663125
Committed: https://crrev.com/288c6917ae57645088e0b3346a150be9a2bf5c2c
Cr-Commit-Position: refs/heads/master@{#433118}

[maxbogue, 2016-11-17 00:32:35]

Description was changed from

==========
[Sync] Move sync's ModelSafeWorker implementations to engine/.

BUG=631271, 663125
==========

to

==========
[Sync] Move sync's ModelSafeWorker implementations to engine/.

PassiveModelWorker already lives in engine/; BrowserThreadModelWorker
and UIModelWorker should too. This unblocks moving SyncBackendRegistrar
to engine/ as well.

BUG=631271, 663125
==========

[maxbogue, 2016-11-17 00:33:02]

maxbogue@chromium.org changed reviewers:
+ pavely@chromium.org

[maxbogue, 2016-11-17 00:33:03]

Pavel, PTAL! More mechanical file moves.

[pavely, 2016-11-17 07:08:47]

lgtm

[maxbogue, 2016-11-17 21:40:17]

The CQ bit was checked by maxbogue@chromium.org

[commit-bot: I haz the power, 2016-11-17 21:41:13]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-11-18 00:06:58]

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

[commit-bot: I haz the power, 2016-11-18 00:06:59]

Failed to apply the patch.

[maxbogue, 2016-11-18 01:03:49]

The CQ bit was checked by maxbogue@chromium.org

[maxbogue, 2016-11-18 01:03:50]

The patchset sent to the CQ was uploaded after l-g-t-m from pavely@chromium.org
Link to the patchset: https://codereview.chromium.org/2503423004/#ps20001
(title: "Rebase.")

[commit-bot: I haz the power, 2016-11-18 01:06:05]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-11-18 05:28:46]

Description was changed from

==========
[Sync] Move sync's ModelSafeWorker implementations to engine/.

PassiveModelWorker already lives in engine/; BrowserThreadModelWorker
and UIModelWorker should too. This unblocks moving SyncBackendRegistrar
to engine/ as well.

BUG=631271, 663125
==========

to

==========
[Sync] Move sync's ModelSafeWorker implementations to engine/.

PassiveModelWorker already lives in engine/; BrowserThreadModelWorker
and UIModelWorker should too. This unblocks moving SyncBackendRegistrar
to engine/ as well.

BUG=631271, 663125
==========

[commit-bot: I haz the power, 2016-11-18 05:28:47]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-11-18 05:32:31]

Description was changed from

==========
[Sync] Move sync's ModelSafeWorker implementations to engine/.

PassiveModelWorker already lives in engine/; BrowserThreadModelWorker
and UIModelWorker should too. This unblocks moving SyncBackendRegistrar
to engine/ as well.

BUG=631271, 663125
==========

to

==========
[Sync] Move sync's ModelSafeWorker implementations to engine/.

PassiveModelWorker already lives in engine/; BrowserThreadModelWorker
and UIModelWorker should too. This unblocks moving SyncBackendRegistrar
to engine/ as well.

BUG=631271, 663125

Committed: https://crrev.com/288c6917ae57645088e0b3346a150be9a2bf5c2c
Cr-Commit-Position: refs/heads/master@{#433118}
==========

[commit-bot: I haz the power, 2016-11-18 05:32:32]

Patchset 2 (id:??) landed as
https://crrev.com/288c6917ae57645088e0b3346a150be9a2bf5c2c
Cr-Commit-Position: refs/heads/master@{#433118}