Adds signin provider APIs that don't return scoped_nsobjects.

Adds signin provider APIs that don't return scoped_nsobjects.

Returning scoped_nsobjects is against the philosophy of autoreleased
objects being passed around. Refactoring methods and functions vending
scoped_nsobjects allows for a cleaner transition to ARC later.

This is CL 1/5.

BUG=None
TEST=None

Review-Url: https://codereview.chromium.org/2934843002
Cr-Commit-Position: refs/heads/master@{#478650}
Committed: https://chromium.googlesource.com/chromium/src/+/2417d00a4e397fffcb5a76ff670fc8bb52819c1e

[stkhapugin, 2017-06-12 15:31:32]

stkhapugin@chromium.org changed reviewers:
+ msarda@chromium.org

[stkhapugin, 2017-06-12 15:31:33]

PTAL

[msarda, 2017-06-12 16:03:37]

The CQ bit was checked by msarda@chromium.org

[msarda, 2017-06-12 16:03:38]

lgtm

[commit-bot: I haz the power, 2017-06-12 16:04:17]

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, 2017-06-12 16:22:17]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1497283417951160, "parent_rev":
"b57b095af61df1e3ec0f21ac128c97c95c572bb9", "commit_rev":
"2417d00a4e397fffcb5a76ff670fc8bb52819c1e"}

[commit-bot: I haz the power, 2017-06-12 16:22:29]

Description was changed from

==========
Adds signin provider APIs that don't return scoped_nsobjects.

Returning scoped_nsobjects is against the philosophy of autoreleased
objects being passed around. Refactoring methods and functions vending
scoped_nsobjects allows for a cleaner transition to ARC later.

This is CL 1/5.

BUG=None
TEST=None
==========

to

==========
Adds signin provider APIs that don't return scoped_nsobjects.

Returning scoped_nsobjects is against the philosophy of autoreleased
objects being passed around. Refactoring methods and functions vending
scoped_nsobjects allows for a cleaner transition to ARC later.

This is CL 1/5.

BUG=None
TEST=None

Review-Url: https://codereview.chromium.org/2934843002
Cr-Commit-Position: refs/heads/master@{#478650}
Committed:
https://chromium.googlesource.com/chromium/src/+/2417d00a4e397fffcb5a76ff670f...
==========

[commit-bot: I haz the power, 2017-06-12 16:22:30]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/2417d00a4e397fffcb5a76ff670f...