Reduce FOR_EACH_OBSERVER usage in ppapi

Reduce FOR_EACH_OBSERVER usage in ppapi

Observer lists now support range-based for loops.

BUG=655021
Committed: https://crrev.com/4fcc0a7a476a0c2adc3e95e8e846d7253b8c38b8
Cr-Commit-Position: refs/heads/master@{#425574}

[Eric Willigers, 2016-10-15 09:49:45]

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

[commit-bot: I haz the power, 2016-10-15 09:49:50]

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 10:50:44]

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

[commit-bot: I haz the power, 2016-10-15 10:50:45]

Dry run: This issue passed the CQ dry run.

[Eric Willigers, 2016-10-15 13:09:11]

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

[bbudge, 2016-10-15 14:18:32]

lgtm

[Eric Willigers, 2016-10-15 21:56:48]

The CQ bit was checked by ericwilligers@chromium.org

[commit-bot: I haz the power, 2016-10-15 21:57:02]

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 22:00:45]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-10-15 22:03:23]

Description was changed from

==========
Reduce FOR_EACH_OBSERVER usage in ppapi

Observer lists now support range-based for loops.


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

to

==========
Reduce FOR_EACH_OBSERVER usage in ppapi

Observer lists now support range-based for loops.

BUG=655021

Committed: https://crrev.com/4fcc0a7a476a0c2adc3e95e8e846d7253b8c38b8
Cr-Commit-Position: refs/heads/master@{#425574}
==========

[commit-bot: I haz the power, 2016-10-15 22:03:24]

Patchset 1 (id:??) landed as
https://crrev.com/4fcc0a7a476a0c2adc3e95e8e846d7253b8c38b8
Cr-Commit-Position: refs/heads/master@{#425574}