Fix |g_all_pools_state| data race by using atomics.

Fix |g_all_pools_state| data race by using atomics.

And change a few checks from != NONE_ACTIVE to == WORKER_CREATED
where it's guaranteed (i.e. in code that can only run after a
Worker is created).

BUG=639812
Committed: https://crrev.com/edb053ea0f3192d89926a1f1fa50747ec00fa078
Cr-Commit-Position: refs/heads/master@{#416250}

[gab, 2016-09-01 15:05:43]

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

[commit-bot: I haz the power, 2016-09-01 15:05:56]

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

[gab, 2016-09-01 15:06:51]

gab@chromium.org changed reviewers:
+ danakj@chromium.org

[gab, 2016-09-01 15:06:52]

Dana PTAL (see bug for discussion, specifically comments #8-11).

[commit-bot: I haz the power, 2016-09-01 16:26:39]

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

[commit-bot: I haz the power, 2016-09-01 16:26:39]

Dry run: This issue passed the CQ dry run.

[danakj, 2016-09-02 00:14:11]

LGTM

[gab, 2016-09-02 13:00:23]

The CQ bit was checked by gab@chromium.org

[commit-bot: I haz the power, 2016-09-02 13:00:36]

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, 2016-09-02 13:04:10]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-09-02 13:06:10]

Description was changed from

==========
Fix |g_all_pools_state| data race by using atomics.

And change a few checks from != NONE_ACTIVE to == WORKER_CREATED
where it's guaranteed (i.e. in code that can only run after a
Worker is created).

BUG=639812
==========

to

==========
Fix |g_all_pools_state| data race by using atomics.

And change a few checks from != NONE_ACTIVE to == WORKER_CREATED
where it's guaranteed (i.e. in code that can only run after a
Worker is created).

BUG=639812

Committed: https://crrev.com/edb053ea0f3192d89926a1f1fa50747ec00fa078
Cr-Commit-Position: refs/heads/master@{#416250}
==========

[commit-bot: I haz the power, 2016-09-02 13:06:11]

Patchset 1 (id:??) landed as
https://crrev.com/edb053ea0f3192d89926a1f1fa50747ec00fa078
Cr-Commit-Position: refs/heads/master@{#416250}