Add an api to disable recording task delay histogrames

Add an api to disable recording task delay histograms

There's a small overhead for recording task delay histograms and
it's not needed on every thread.

Originally part of https://codereview.chromium.org/2546423002/

BUG=578176
Review-Url: https://codereview.chromium.org/2640303002
Cr-Commit-Position: refs/heads/master@{#445029}
Committed: https://chromium.googlesource.com/chromium/src/+/1b5ef968a2604c1775483e86a5928c95d8688e68

[alex clarke (OOO till 29th), 2017-01-19 15:32:29]

Description was changed from

==========
Add an api to disable recording task delay histogrames

There's a small overhead for recording task delay histogrames and
it's not needed on every thread.

BUG=578176
==========

to

==========
Add an api to disable recording task delay histograms

There's a small overhead for recording task delay histograms and
it's not needed on every thread.

Originally part of https://codereview.chromium.org/2546423002/

BUG=578176
==========

[alex clarke (OOO till 29th), 2017-01-19 15:32:39]

alexclarke@chromium.org changed reviewers:
+ skyostil@chromium.org

[alex clarke (OOO till 29th), 2017-01-19 15:32:59]

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

[alex clarke (OOO till 29th), 2017-01-19 15:33:07]

PTAL

[commit-bot: I haz the power, 2017-01-19 15:33:22]

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, 2017-01-19 16:11:30]

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

[commit-bot: I haz the power, 2017-01-19 16:11:31]

Dry run: Try jobs failed on following builders:
  linux_android_rel_ng on master.tryserver.chromium.android (JOB_FAILED,
https://build.chromium.org/p/tryserver.chromium.android/builders/linux_androi...)

[Sami, 2017-01-19 17:25:34]

lgtm

[alex clarke (OOO till 29th), 2017-01-20 08:51:06]

The CQ bit was checked by alexclarke@chromium.org

[alex clarke (OOO till 29th), 2017-01-20 08:51:06]

The patchset sent to the CQ was uploaded after l-g-t-m from
skyostil@chromium.org
Link to the patchset: https://codereview.chromium.org/2640303002/#ps20001
(title: "Fix bad merge")

[commit-bot: I haz the power, 2017-01-20 08:51:14]

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, 2017-01-20 10:17:33]

CQ is committing da patch.

Bot data: {"patchset_id": 20001, "attempt_start_ts": 1484902266407870,
"parent_rev": "06f260832ead33668b4fa5a64074fb8a158b127f", "commit_rev":
"1b5ef968a2604c1775483e86a5928c95d8688e68"}

[commit-bot: I haz the power, 2017-01-20 10:18:02]

Description was changed from

==========
Add an api to disable recording task delay histograms

There's a small overhead for recording task delay histograms and
it's not needed on every thread.

Originally part of https://codereview.chromium.org/2546423002/

BUG=578176
==========

to

==========
Add an api to disable recording task delay histograms

There's a small overhead for recording task delay histograms and
it's not needed on every thread.

Originally part of https://codereview.chromium.org/2546423002/

BUG=578176

Review-Url: https://codereview.chromium.org/2640303002
Cr-Commit-Position: refs/heads/master@{#445029}
Committed:
https://chromium.googlesource.com/chromium/src/+/1b5ef968a2604c1775483e86a592...
==========

[commit-bot: I haz the power, 2017-01-20 10:18:03]

Committed patchset #2 (id:20001) as
https://chromium.googlesource.com/chromium/src/+/1b5ef968a2604c1775483e86a592...