Reduce usage of FOR_EACH_OBSERVER macro in components/invalidation

Reduce usage of FOR_EACH_OBSERVER macro in components/invalidation

Observer lists now support range-based for loops.

BUG=655021
Committed: https://crrev.com/7b2ea16259b449afdc068feffcbe6d59df6fb39a
Cr-Commit-Position: refs/heads/master@{#426096}

[Eric Willigers, 2016-10-18 08:50:35]

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

[pavely, 2016-10-18 17:16:51]

lgtm

[Eric Willigers, 2016-10-18 22:43:43]

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

[commit-bot: I haz the power, 2016-10-18 22:44:31]

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

[Eric Willigers, 2016-10-18 23:49:23]

The CQ bit was unchecked by ericwilligers@chromium.org

[Eric Willigers, 2016-10-18 23:49:29]

The CQ bit was checked by ericwilligers@chromium.org

[commit-bot: I haz the power, 2016-10-18 23:49:51]

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, 2016-10-19 00:08:23]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-10-21 13:05:03]

Description was changed from

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

Observer lists now support range-based for loops.

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

to

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

Observer lists now support range-based for loops.

BUG=655021

Committed: https://crrev.com/7b2ea16259b449afdc068feffcbe6d59df6fb39a
Cr-Commit-Position: refs/heads/master@{#426096}
==========

[commit-bot: I haz the power, 2016-10-21 13:05:04]

Patchset 1 (id:??) landed as
https://crrev.com/7b2ea16259b449afdc068feffcbe6d59df6fb39a
Cr-Commit-Position: refs/heads/master@{#426096}