Revert of [scheduler] Move some task types to suspendable task runner.

Revert of [scheduler] Move some task types to suspendable task runner. (patchset #1 id:1 of https://codereview.chromium.org/2808273003/ )

Reason for revert:
Causing telemetry test failures:
https://bugs.chromium.org/p/chromium/issues/detail?id=717078&can=2&start=0&num=100&q=owner%3Ame&colspec=ID%20Pri%20M%20Stars%20ReleaseBlock%20Component%20Status%20Owner%20Summary%20OS%20Modified&groupby=&sort=&hotlist_id=

Original issue's description:
> [scheduler] Move some task types to suspendable task runner.
> 
> Move several safe-looking task types to suspendable task runner.
> More task types will be moved to suspendable task runner, but
> we'll start with this set and will monitor any problems
> (there were some perfbot failures when all task queues were
> moved to suspendable task runner).
> 
> R=haraken@chromium.org
> CC=skyostil@chromium.org
> BUG=702160
> 
> Review-Url: https://codereview.chromium.org/2808273003
> Cr-Original-Commit-Position: refs/heads/master@{#464025}
> Committed: https://chromium.googlesource.com/chromium/src/+/78a049660074003b8e1e602b0e7783ca7f1f4ee0
> Review-Url: https://codereview.chromium.org/2808273003
> Cr-Commit-Position: refs/heads/master@{#467633}
> Committed: https://chromium.googlesource.com/chromium/src/+/c18764a33a595baab6ba35a1447e51c7c74b6e30

TBR=haraken@chromium.org,skyostil@chromium.org,altimin@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=702160
Review-Url: https://codereview.chromium.org/2850143003
Cr-Commit-Position: refs/heads/master@{#468511}
Committed: https://chromium.googlesource.com/chromium/src/+/0079dbad35b7fb64939a1c5ddc992084cc5001b1

[rnephew (Reviews Here), 2017-05-01 21:06:46]

The CQ bit was checked by rnephew@chromium.org

[rnephew (Reviews Here), 2017-05-01 21:06:46]

Created Revert of [scheduler] Move some task types to suspendable task runner.

[commit-bot: I haz the power, 2017-05-01 21:07:39]

CQ is trying da patch.

Follow status at:
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[haraken, 2017-05-01 22:32:32]

Interesting. LGTM to revert.

[commit-bot: I haz the power, 2017-05-02 00:45:14]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1493672806303240, "parent_rev":
"06d120609d01e63b439496a09945d4025b727c4b", "commit_rev":
"0079dbad35b7fb64939a1c5ddc992084cc5001b1"}

[commit-bot: I haz the power, 2017-05-02 00:45:21]

Description was changed from

==========
Revert of [scheduler] Move some task types to suspendable task runner. (patchset
#1 id:1 of https://codereview.chromium.org/2808273003/ )

Reason for revert:
Causing telemetry test failures:
https://bugs.chromium.org/p/chromium/issues/detail?id=717078&can=2&start=0&nu...

Original issue's description:
> [scheduler] Move some task types to suspendable task runner.
> 
> Move several safe-looking task types to suspendable task runner.
> More task types will be moved to suspendable task runner, but
> we'll start with this set and will monitor any problems
> (there were some perfbot failures when all task queues were
> moved to suspendable task runner).
> 
> R=haraken@chromium.org
> CC=skyostil@chromium.org
> BUG=702160
> 
> Review-Url: https://codereview.chromium.org/2808273003
> Cr-Original-Commit-Position: refs/heads/master@{#464025}
> Committed:
https://chromium.googlesource.com/chromium/src/+/78a049660074003b8e1e602b0e77...
> Review-Url: https://codereview.chromium.org/2808273003
> Cr-Commit-Position: refs/heads/master@{#467633}
> Committed:
https://chromium.googlesource.com/chromium/src/+/c18764a33a595baab6ba35a1447e...

TBR=haraken@chromium.org,skyostil@chromium.org,altimin@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=702160
==========

to

==========
Revert of [scheduler] Move some task types to suspendable task runner. (patchset
#1 id:1 of https://codereview.chromium.org/2808273003/ )

Reason for revert:
Causing telemetry test failures:
https://bugs.chromium.org/p/chromium/issues/detail?id=717078&can=2&start=0&nu...

Original issue's description:
> [scheduler] Move some task types to suspendable task runner.
> 
> Move several safe-looking task types to suspendable task runner.
> More task types will be moved to suspendable task runner, but
> we'll start with this set and will monitor any problems
> (there were some perfbot failures when all task queues were
> moved to suspendable task runner).
> 
> R=haraken@chromium.org
> CC=skyostil@chromium.org
> BUG=702160
> 
> Review-Url: https://codereview.chromium.org/2808273003
> Cr-Original-Commit-Position: refs/heads/master@{#464025}
> Committed:
https://chromium.googlesource.com/chromium/src/+/78a049660074003b8e1e602b0e77...
> Review-Url: https://codereview.chromium.org/2808273003
> Cr-Commit-Position: refs/heads/master@{#467633}
> Committed:
https://chromium.googlesource.com/chromium/src/+/c18764a33a595baab6ba35a1447e...

TBR=haraken@chromium.org,skyostil@chromium.org,altimin@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=702160

Review-Url: https://codereview.chromium.org/2850143003
Cr-Commit-Position: refs/heads/master@{#468511}
Committed:
https://chromium.googlesource.com/chromium/src/+/0079dbad35b7fb64939a1c5ddc99...
==========

[commit-bot: I haz the power, 2017-05-02 00:45:22]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/0079dbad35b7fb64939a1c5ddc99...