Remove usage of FOR_EACH_OBSERVER macro in services/

Remove usage of FOR_EACH_OBSERVER macro in services/

Observer lists now support range-based for loops.

BUG=655021
Committed: https://crrev.com/e9f4516076a6e3a3b4b8043347e613f5cc59165e
Cr-Commit-Position: refs/heads/master@{#425615}

[Eric Willigers, 2016-10-15 14:55:55]

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

[commit-bot: I haz the power, 2016-10-15 14:56:05]

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, 2016-10-15 17:12:08]

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

[commit-bot: I haz the power, 2016-10-15 17:12:09]

Dry run: This issue passed the CQ dry run.

[Eric Willigers, 2016-10-16 20:31:55]

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

[Ben Goodger (Google), 2016-10-17 02:35:51]

rs lgtm

[Eric Willigers, 2016-10-17 03:12:05]

The CQ bit was checked by ericwilligers@chromium.org

[commit-bot: I haz the power, 2016-10-17 03:12:11]

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, 2016-10-17 04:29:53]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-10-17 04:32:28]

Description was changed from

==========
Remove usage of FOR_EACH_OBSERVER macro in services/

Observer lists now support range-based for loops.


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

to

==========
Remove usage of FOR_EACH_OBSERVER macro in services/

Observer lists now support range-based for loops.

BUG=655021

Committed: https://crrev.com/e9f4516076a6e3a3b4b8043347e613f5cc59165e
Cr-Commit-Position: refs/heads/master@{#425615}
==========

[commit-bot: I haz the power, 2016-10-17 04:32:29]

Patchset 1 (id:??) landed as
https://crrev.com/e9f4516076a6e3a3b4b8043347e613f5cc59165e
Cr-Commit-Position: refs/heads/master@{#425615}