[ObjC ARC] Converts ios/chrome/browser/signin:unit_tests to ARC.

[ObjC ARC] Converts ios/chrome/browser/signin:unit_tests to ARC.

Automatically generated ARCMigrate commit
Notable issues:None
BUG=624363
TEST=None

Review-Url: https://codereview.chromium.org/2935733002
Cr-Commit-Position: refs/heads/master@{#478991}
Committed: https://chromium.googlesource.com/chromium/src/+/707eaf1889e8f3c82d2bac1a7331b8012acbe8ff

[marq (ping after 24h), 2017-06-12 13:36:41]

The CQ bit was checked by marq@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2017-06-12 13:36:50]

Dry run: 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 15:38:37]

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

[commit-bot: I haz the power, 2017-06-12 15:38:37]

Dry run: This issue passed the CQ dry run.

[marq (ping after 24h), 2017-06-12 16:47:29]

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

[stkhapugin, 2017-06-13 11:58:43]

lgtm

[msarda, 2017-06-13 13:05:36]

lgtm

[marq (ping after 24h), 2017-06-13 13:09:26]

The CQ bit was checked by marq@chromium.org

[commit-bot: I haz the power, 2017-06-13 13:09:40]

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, 2017-06-13 13:14:05]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1497359366085420, "parent_rev":
"c0bf70fdccf4a551f4df5241ccd52b3370f3727b", "commit_rev":
"707eaf1889e8f3c82d2bac1a7331b8012acbe8ff"}

[commit-bot: I haz the power, 2017-06-13 13:14:17]

Description was changed from

==========
[ObjC ARC] Converts ios/chrome/browser/signin:unit_tests to ARC.

Automatically generated ARCMigrate commit
Notable issues:None
BUG=624363
TEST=None
==========

to

==========
[ObjC ARC] Converts ios/chrome/browser/signin:unit_tests to ARC.

Automatically generated ARCMigrate commit
Notable issues:None
BUG=624363
TEST=None

Review-Url: https://codereview.chromium.org/2935733002
Cr-Commit-Position: refs/heads/master@{#478991}
Committed:
https://chromium.googlesource.com/chromium/src/+/707eaf1889e8f3c82d2bac1a7331...
==========

[commit-bot: I haz the power, 2017-06-13 13:14:18]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/707eaf1889e8f3c82d2bac1a7331...