Make webrtc_perf_tests run serially on swarming.

Make webrtc_perf_tests run serially on swarming.

BUG=chromium:755660
NOTRY=True

Review-Url: https://codereview.webrtc.org/3012973002
Cr-Commit-Position: refs/heads/master@{#19783}
Committed: https://chromium.googlesource.com/external/webrtc/+/a827c087fad1278c3c613ddff97458af8923b52e

[ehmaldonado_webrtc, 2017-09-11 14:28:21]

The CQ bit was checked by ehmaldonado@webrtc.org to run a CQ dry run

[commit-bot: I haz the power, 2017-09-11 14:28:24]

Dry run: CQ is trying da patch.

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

[ehmaldonado_webrtc, 2017-09-11 14:28:32]

ehmaldonado@webrtc.org changed reviewers:
+ kjellander@webrtc.org

[commit-bot: I haz the power, 2017-09-11 15:16:34]

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

[commit-bot: I haz the power, 2017-09-11 15:16:35]

Dry run: This issue passed the CQ dry run.

[kjellander_webrtc, 2017-09-11 18:58:19]

Ouch, that's certainly necessary to avoid weird results.

lgtm

[ehmaldonado_webrtc, 2017-09-11 19:12:09]

Description was changed from

==========
Make webrtc_perf_tests run serially on swarming.

BUG=chromium:755660
==========

to

==========
Make webrtc_perf_tests run serially on swarming.

BUG=chromium:755660
NOTRY=True
==========

[ehmaldonado_webrtc, 2017-09-11 19:12:13]

The CQ bit was checked by ehmaldonado@webrtc.org

[commit-bot: I haz the power, 2017-09-11 19:12:21]

CQ is trying da patch.

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

[commit-bot: I haz the power, 2017-09-11 19:14:59]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1505157133691310, "parent_rev":
"063f0c0d3ac62f9110d54c7fea8aed7722264600", "commit_rev":
"a827c087fad1278c3c613ddff97458af8923b52e"}

[commit-bot: I haz the power, 2017-09-11 19:15:05]

Description was changed from

==========
Make webrtc_perf_tests run serially on swarming.

BUG=chromium:755660
NOTRY=True
==========

to

==========
Make webrtc_perf_tests run serially on swarming.

BUG=chromium:755660
NOTRY=True

Review-Url: https://codereview.webrtc.org/3012973002
Cr-Commit-Position: refs/heads/master@{#19783}
Committed:
https://chromium.googlesource.com/external/webrtc/+/a827c087fad1278c3c613ddff...
==========

[commit-bot: I haz the power, 2017-09-11 19:15:06]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/external/webrtc/+/a827c087fad1278c3c613ddff...