Componentize more signin code

Componentize more signin code

This CL componentizes the preferences registration in
AccountTrackerService, and FakeProfileOAuth2TokenService.
This is a simple code move with no change in behavior.

BUG=332107
TBR=jochen

Committed: https://crrev.com/0c01726ff9b4e966a026aa65994d860f1041c128
Cr-Commit-Position: refs/heads/master@{#339688}

[droger, 2015-07-21 13:38:49]

droger@chromium.org changed reviewers:
+ bauerb@chromium.org, rogerta@chromium.org

[droger, 2015-07-21 13:38:50]

CC bzanotti FYI
rogerta: please review
bauerb: for the dependency of components/signin on user_prefs

[Bernhard Bauer, 2015-07-21 14:31:01]

DEPS change LGTM

[Roger Tawa OOO till Jul 10th, 2015-07-21 17:15:53]

lgtm

This is awesome David! Thanks for doing this componentization.

[droger, 2015-07-21 17:28:52]

The CQ bit was checked by droger@chromium.org

[commit-bot: I haz the power, 2015-07-21 17:30:22]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1245103005/1

[droger, 2015-07-21 17:35:47]

droger@chromium.org changed reviewers:
+ jochen@chromium.org

[droger, 2015-07-21 17:36:05]

TBR=jochen for #include changes.

[commit-bot: I haz the power, 2015-07-21 17:43:12]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-07-21 17:44:16]

Patchset 1 (id:??) landed as
https://crrev.com/0c01726ff9b4e966a026aa65994d860f1041c128
Cr-Commit-Position: refs/heads/master@{#339688}