Reduce usage of FOR_EACH_OBSERVER macro in chrome/browser/signin

Reduce usage of FOR_EACH_OBSERVER macro in chrome/browser/signin

Observer lists now support range-based for loops.

BUG=655021
Committed: https://crrev.com/cbd511b8d0d428d569c8012532ba0c80240ad160
Cr-Commit-Position: refs/heads/master@{#426951}

[Eric Willigers, 2016-10-19 12:06:31]

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

[commit-bot: I haz the power, 2016-10-19 12:07:11]

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

[Eric Willigers, 2016-10-19 12:07:30]

ericwilligers@chromium.org changed reviewers:
+ atwilson@chromium.org

[commit-bot: I haz the power, 2016-10-19 12:57:08]

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

[commit-bot: I haz the power, 2016-10-19 12:57:08]

Dry run: This issue passed the CQ dry run.

[Andrew T Wilson (Slow), 2016-10-21 13:39:23]

lgtm

[Eric Willigers, 2016-10-21 20:59:10]

The CQ bit was checked by ericwilligers@chromium.org

[commit-bot: I haz the power, 2016-10-21 21:00:01]

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, 2016-10-21 21:42:06]

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

[commit-bot: I haz the power, 2016-10-21 21:42:07]

Try jobs failed on following builders:
  chromium_presubmit on master.tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/chromium_presub...)

[Eric Willigers, 2016-10-21 23:07:13]

ericwilligers@chromium.org changed reviewers:
+ thestig@chromium.org

[Lei Zhang, 2016-10-22 00:38:37]

rs lgtm

[Eric Willigers, 2016-10-22 01:12:27]

The CQ bit was checked by ericwilligers@chromium.org

[commit-bot: I haz the power, 2016-10-22 01:13:08]

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, 2016-10-22 02:20:05]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-10-22 02:22:15]

Description was changed from

==========
Reduce usage of FOR_EACH_OBSERVER macro in chrome/browser/signin

Observer lists now support range-based for loops.


BUG=655021
==========

to

==========
Reduce usage of FOR_EACH_OBSERVER macro in chrome/browser/signin

Observer lists now support range-based for loops.

BUG=655021

Committed: https://crrev.com/cbd511b8d0d428d569c8012532ba0c80240ad160
Cr-Commit-Position: refs/heads/master@{#426951}
==========

[commit-bot: I haz the power, 2016-10-22 02:22:16]

Patchset 2 (id:??) landed as
https://crrev.com/cbd511b8d0d428d569c8012532ba0c80240ad160
Cr-Commit-Position: refs/heads/master@{#426951}