Allow empty UKM entries to be recorded.

Allow empty UKM entries to be recorded.

BUG=717793
Review-Url: https://codereview.chromium.org/2855053002
Cr-Commit-Position: refs/heads/master@{#469101}
Committed: https://chromium.googlesource.com/chromium/src/+/60d054d1f297debcae848680eead71f2517003fc

[Steven Holte, 2017-05-03 00:00:35]

holte@chromium.org changed reviewers:
+ rkaplow@chromium.org

[Steven Holte, 2017-05-03 00:07:10]

Description was changed from

==========
Allow empty UKM entries to be recorded.

BUG=
==========

to

==========
Allow empty UKM entries to be recorded.

BUG=717793
==========

[rkaplow, 2017-05-03 13:46:39]

lgtm

[Steven Holte, 2017-05-03 18:29:18]

The CQ bit was checked by holte@chromium.org

[commit-bot: I haz the power, 2017-05-03 18:30:05]

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, 2017-05-03 18:51:29]

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

[commit-bot: I haz the power, 2017-05-03 18:51:30]

Try jobs failed on following builders:
  linux_chromium_tsan_rel_ng on master.tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)

[Steven Holte, 2017-05-03 19:16:02]

The CQ bit was checked by holte@chromium.org

[Steven Holte, 2017-05-03 19:16:02]

The patchset sent to the CQ was uploaded after l-g-t-m from rkaplow@chromium.org
Link to the patchset: https://codereview.chromium.org/2855053002/#ps20001
(title: "Fix test")

[commit-bot: I haz the power, 2017-05-03 19:16:46]

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, 2017-05-03 20:14:22]

CQ is committing da patch.

Bot data: {"patchset_id": 20001, "attempt_start_ts": 1493838962156630,
"parent_rev": "4f4c7be3fa5538960e73ef6879b3d9fa10d6d2e1", "commit_rev":
"60d054d1f297debcae848680eead71f2517003fc"}

[commit-bot: I haz the power, 2017-05-03 20:14:38]

Description was changed from

==========
Allow empty UKM entries to be recorded.

BUG=717793
==========

to

==========
Allow empty UKM entries to be recorded.

BUG=717793

Review-Url: https://codereview.chromium.org/2855053002
Cr-Commit-Position: refs/heads/master@{#469101}
Committed:
https://chromium.googlesource.com/chromium/src/+/60d054d1f297debcae848680eead...
==========

[commit-bot: I haz the power, 2017-05-03 20:14:39]

Committed patchset #2 (id:20001) as
https://chromium.googlesource.com/chromium/src/+/60d054d1f297debcae848680eead...