Revert of Disable COM Initialization on SchedulerWorkers When COM_INIT_CHECK_HOOK_ENABLED()

Revert of Disable COM Initialization on SchedulerWorkers When COM_INIT_CHECK_HOOK_ENABLED() (patchset #1 id:1 of https://codereview.chromium.org/2978253002/ )

Reason for revert:
Causes

base/task_scheduler/scheduler_worker.h(199,40):  error: private field 'backward_compatibility_' is not used [-Werror,-Wunused-private-field]
  const SchedulerBackwardCompatibility backward_compatibility_;

Original issue's description:
> Disable COM Initialization on SchedulerWorkers When COM_INIT_CHECK_HOOK_ENABLED()
> 
> This change will allow for the detection of tasks running in
> TaskScheduler that fail to post their task in a COM STA Task Runner
> instead.
> 
> BUG=706512
> TBR=gab@chromium.org
> Previously Reviewed at https://chromium-review.googlesource.com/c/549223/
> 
> Review-Url: https://codereview.chromium.org/2978253002
> Cr-Commit-Position: refs/heads/master@{#487625}
> Committed: https://chromium.googlesource.com/chromium/src/+/122a24f59d90a1b225e00b3ab6c9fd37fd365b8f

TBR=gab@chromium.org,rnk@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=706512
Review-Url: https://codereview.chromium.org/2983143002
Cr-Commit-Position: refs/heads/master@{#488089}
Committed: https://chromium.googlesource.com/chromium/src/+/9d02b58c2721f40f9b1f89af4fde464b6531360d

[robliao, 2017-07-20 00:30:48]

Created Revert of Disable COM Initialization on SchedulerWorkers When
COM_INIT_CHECK_HOOK_ENABLED()

[robliao, 2017-07-20 00:30:57]

The CQ bit was checked by robliao@chromium.org

[commit-bot: I haz the power, 2017-07-20 00:31:07]

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, 2017-07-20 01:47:43]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1500510657934340, "parent_rev":
"c1df3d4456b27362d65b06c7ee52a88d36af6fb4", "commit_rev":
"6a19241f3c1231d42e72e343b81649d422ba56f2"}

[commit-bot: I haz the power, 2017-07-20 01:48:01]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1500510657934340, "parent_rev":
"c6daaeebc89b1445d744bd1f4a456933d68ce620", "commit_rev":
"9d02b58c2721f40f9b1f89af4fde464b6531360d"}

[commit-bot: I haz the power, 2017-07-20 01:48:16]

Description was changed from

==========
Revert of Disable COM Initialization on SchedulerWorkers When
COM_INIT_CHECK_HOOK_ENABLED() (patchset #1 id:1 of
https://codereview.chromium.org/2978253002/ )

Reason for revert:
Causes

base/task_scheduler/scheduler_worker.h(199,40):  error: private field
'backward_compatibility_' is not used [-Werror,-Wunused-private-field]
  const SchedulerBackwardCompatibility backward_compatibility_;

Original issue's description:
> Disable COM Initialization on SchedulerWorkers When
COM_INIT_CHECK_HOOK_ENABLED()
> 
> This change will allow for the detection of tasks running in
> TaskScheduler that fail to post their task in a COM STA Task Runner
> instead.
> 
> BUG=706512
> TBR=gab@chromium.org
> Previously Reviewed at https://chromium-review.googlesource.com/c/549223/
> 
> Review-Url: https://codereview.chromium.org/2978253002
> Cr-Commit-Position: refs/heads/master@{#487625}
> Committed:
https://chromium.googlesource.com/chromium/src/+/122a24f59d90a1b225e00b3ab6c9...

TBR=gab@chromium.org,rnk@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=706512
==========

to

==========
Revert of Disable COM Initialization on SchedulerWorkers When
COM_INIT_CHECK_HOOK_ENABLED() (patchset #1 id:1 of
https://codereview.chromium.org/2978253002/ )

Reason for revert:
Causes

base/task_scheduler/scheduler_worker.h(199,40):  error: private field
'backward_compatibility_' is not used [-Werror,-Wunused-private-field]
  const SchedulerBackwardCompatibility backward_compatibility_;

Original issue's description:
> Disable COM Initialization on SchedulerWorkers When
COM_INIT_CHECK_HOOK_ENABLED()
> 
> This change will allow for the detection of tasks running in
> TaskScheduler that fail to post their task in a COM STA Task Runner
> instead.
> 
> BUG=706512
> TBR=gab@chromium.org
> Previously Reviewed at https://chromium-review.googlesource.com/c/549223/
> 
> Review-Url: https://codereview.chromium.org/2978253002
> Cr-Commit-Position: refs/heads/master@{#487625}
> Committed:
https://chromium.googlesource.com/chromium/src/+/122a24f59d90a1b225e00b3ab6c9...

TBR=gab@chromium.org,rnk@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=706512

Review-Url: https://codereview.chromium.org/2983143002
Cr-Commit-Position: refs/heads/master@{#488089}
Committed:
https://chromium.googlesource.com/chromium/src/+/9d02b58c2721f40f9b1f89af4fde...
==========

[commit-bot: I haz the power, 2017-07-20 01:48:17]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/9d02b58c2721f40f9b1f89af4fde...