Reduce usage of FOR_EACH_OBSERVER macro in components/

Reduce usage of FOR_EACH_OBSERVER macro in components/

Observer lists now support range-based for loops.

BUG=655021
Committed: https://crrev.com/42b92c1829a49c1eb82231776b9ef94481da0257
Cr-Commit-Position: refs/heads/master@{#427133}

[Eric Willigers, 2016-10-23 22:59:37]

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

[commit-bot: I haz the power, 2016-10-23 22:59:47]

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

[Eric Willigers, 2016-10-23 23:31:48]

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

[commit-bot: I haz the power, 2016-10-24 00:39:30]

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

[commit-bot: I haz the power, 2016-10-24 00:39:31]

Dry run: This issue passed the CQ dry run.

[blundell, 2016-10-24 16:13:14]

lgtm

[Eric Willigers, 2016-10-24 20:01:09]

The CQ bit was checked by ericwilligers@chromium.org

[commit-bot: I haz the power, 2016-10-24 20:02:56]

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, 2016-10-24 20:21:39]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-10-24 20:25:31]

Description was changed from

==========
Reduce usage of FOR_EACH_OBSERVER macro in components/

Observer lists now support range-based for loops.

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

to

==========
Reduce usage of FOR_EACH_OBSERVER macro in components/

Observer lists now support range-based for loops.

BUG=655021

Committed: https://crrev.com/42b92c1829a49c1eb82231776b9ef94481da0257
Cr-Commit-Position: refs/heads/master@{#427133}
==========

[commit-bot: I haz the power, 2016-10-24 20:25:32]

Patchset 1 (id:??) landed as
https://crrev.com/42b92c1829a49c1eb82231776b9ef94481da0257
Cr-Commit-Position: refs/heads/master@{#427133}