Remove usage of FOR_EACH_OBSERVER macro in ash/common

Remove usage of FOR_EACH_OBSERVER macro in ash/common

Observer lists now support range-based for loops.

BUG=655021
Committed: https://crrev.com/5c5793146c75f6f720e1ff5bcd01752ae7cb05b1
Cr-Commit-Position: refs/heads/master@{#425443}

[Eric Willigers, 2016-10-14 05:37:53]

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

[commit-bot: I haz the power, 2016-10-14 05:38:08]

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, 2016-10-14 06:03:47]

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

[commit-bot: I haz the power, 2016-10-14 06:03:48]

Dry run: This issue passed the CQ dry run.

[Eric Willigers, 2016-10-14 06:50:06]

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

[Daniel Erat, 2016-10-14 15:21:49]

lgtm

[Eric Willigers, 2016-10-14 19:55:06]

The CQ bit was checked by ericwilligers@chromium.org

[commit-bot: I haz the power, 2016-10-14 19:55:33]

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, 2016-10-14 20:08:04]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-10-14 20:10:24]

Description was changed from

==========
Remove usage of FOR_EACH_OBSERVER macro in ash/common

Observer lists now support range-based for loops.


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

to

==========
Remove usage of FOR_EACH_OBSERVER macro in ash/common

Observer lists now support range-based for loops.

BUG=655021

Committed: https://crrev.com/5c5793146c75f6f720e1ff5bcd01752ae7cb05b1
Cr-Commit-Position: refs/heads/master@{#425443}
==========

[commit-bot: I haz the power, 2016-10-14 20:10:25]

Patchset 1 (id:??) landed as
https://crrev.com/5c5793146c75f6f720e1ff5bcd01752ae7cb05b1
Cr-Commit-Position: refs/heads/master@{#425443}