Remove usage of FOR_EACH_OBSERVER macro in mojo

Remove usage of FOR_EACH_OBSERVER macro in mojo

Observer lists now support range-based for loops.

BUG=655021
Committed: https://crrev.com/ef4a9037f628f79c406b28e199ffaff192e3f299
Cr-Commit-Position: refs/heads/master@{#425444}

[Eric Willigers, 2016-10-14 05:40:50]

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

[commit-bot: I haz the power, 2016-10-14 05:41:09]

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 06:23:32]

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

[commit-bot: I haz the power, 2016-10-14 06:23:34]

Dry run: This issue passed the CQ dry run.

[Eric Willigers, 2016-10-14 06:49:11]

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

[jam, 2016-10-14 17:34:11]

lgtm

[Eric Willigers, 2016-10-14 19:55:03]

The CQ bit was checked by ericwilligers@chromium.org

[commit-bot: I haz the power, 2016-10-14 19:55:35]

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 20:09:00]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-10-14 20:13:03]

Description was changed from

==========
Remove usage of FOR_EACH_OBSERVER macro in mojo

Observer lists now support range-based for loops.


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

to

==========
Remove usage of FOR_EACH_OBSERVER macro in mojo

Observer lists now support range-based for loops.

BUG=655021

Committed: https://crrev.com/ef4a9037f628f79c406b28e199ffaff192e3f299
Cr-Commit-Position: refs/heads/master@{#425444}
==========

[commit-bot: I haz the power, 2016-10-14 20:13:04]

Patchset 1 (id:??) landed as
https://crrev.com/ef4a9037f628f79c406b28e199ffaff192e3f299
Cr-Commit-Position: refs/heads/master@{#425444}