Use TaskScheduler instead of blocking pool in external_metrics.cc.

Use TaskScheduler instead of blocking pool in external_metrics.cc.

The blocking pool is being deprecated in favor of TaskScheduler.

BUG=667892
Review-Url: https://codereview.chromium.org/2839973002
Cr-Commit-Position: refs/heads/master@{#467632}
Committed: https://chromium.googlesource.com/chromium/src/+/b4046080f31d65ed2618ecf1a2538ac322e9848a

[fdoray, 2017-04-25 13:43:41]

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

[commit-bot: I haz the power, 2017-04-25 13:43:57]

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, 2017-04-25 13:57:30]

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

[commit-bot: I haz the power, 2017-04-25 13:57:31]

Dry run: Try jobs failed on following builders:
  chromeos_daisy_chromium_compile_only_ng on master.tryserver.chromium.linux
(JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/chromeos_daisy_...)

[fdoray, 2017-04-26 19:05:07]

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

[commit-bot: I haz the power, 2017-04-26 19:06:05]

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, 2017-04-26 19:48:35]

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

[commit-bot: I haz the power, 2017-04-26 19:48:36]

Dry run: This issue passed the CQ dry run.

[fdoray, 2017-04-26 20:26:25]

fdoray@chromium.org changed reviewers:
+ oshima@chromium.org

[fdoray, 2017-04-26 20:26:26]

PTAL

[oshima, 2017-04-26 21:43:15]

lgtm

[fdoray, 2017-04-27 10:16:33]

The CQ bit was checked by fdoray@chromium.org

[commit-bot: I haz the power, 2017-04-27 10:16:44]

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, 2017-04-27 10:21:10]

CQ is committing da patch.

Bot data: {"patchset_id": 20001, "attempt_start_ts": 1493288193975590,
"parent_rev": "55180f5ed3cd7386ef97e044d4084e5fb9afc67a", "commit_rev":
"b4046080f31d65ed2618ecf1a2538ac322e9848a"}

[commit-bot: I haz the power, 2017-04-27 10:21:17]

Description was changed from

==========
Use TaskScheduler instead of blocking pool in external_metrics.cc.

The blocking pool is being deprecated in favor of TaskScheduler.

BUG=667892
==========

to

==========
Use TaskScheduler instead of blocking pool in external_metrics.cc.

The blocking pool is being deprecated in favor of TaskScheduler.

BUG=667892

Review-Url: https://codereview.chromium.org/2839973002
Cr-Commit-Position: refs/heads/master@{#467632}
Committed:
https://chromium.googlesource.com/chromium/src/+/b4046080f31d65ed2618ecf1a253...
==========

[commit-bot: I haz the power, 2017-04-27 10:21:17]

Committed patchset #2 (id:20001) as
https://chromium.googlesource.com/chromium/src/+/b4046080f31d65ed2618ecf1a253...