Added UMA stat to track migration of profile_ever_initialized attribute.

Added UMA stat to track migration of profile_ever_initialized attribute.

BUG=736760
Review-Url: https://codereview.chromium.org/2959733002
Cr-Commit-Position: refs/heads/master@{#483690}
Committed: https://chromium.googlesource.com/chromium/src/+/1cac7368c762e81a39f70830be585e1b6d688a8f

[Andrew T Wilson (Slow), 2017-06-26 16:03:30]

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

[commit-bot: I haz the power, 2017-06-26 16:03:40]

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, 2017-06-26 17:27:32]

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

[commit-bot: I haz the power, 2017-06-26 17:27:33]

Dry run: This issue passed the CQ dry run.

[Andrew T Wilson (Slow), 2017-06-29 11:52:05]

atwilson@chromium.org changed reviewers:
+ alemate@chromium.org, asvitkine@chromium.org, isherman@chromium.org

[Andrew T Wilson (Slow), 2017-06-29 11:52:06]

alemate: ptal at known_users.cc
asvitkine or isherman: ptal at histograms.xml

[Alexei Svitkine (slow), 2017-06-29 13:48:12]

Description was changed from

==========
Added UMA stat to track migration of profile_ever_initialized attribute.

BUG=736760
==========

to

==========
Added UMA stat to track migration of profile_ever_initialized attribute.

BUG=736760
==========

[Alexei Svitkine (slow), 2017-06-29 13:48:12]

asvitkine@chromium.org changed reviewers:
- asvitkine@chromium.org

[Ilya Sherman, 2017-06-29 17:43:37]

LGTM

[Alexander Alekseev, 2017-06-29 20:29:37]

lgtm

[Andrew T Wilson (Slow), 2017-06-30 12:16:07]

The CQ bit was checked by atwilson@chromium.org

[commit-bot: I haz the power, 2017-06-30 12:16:18]

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, 2017-06-30 13:33:50]

CQ is committing da patch.

Bot data: {"patchset_id": 20001, "attempt_start_ts": 1498824967979750,
"parent_rev": "9ff970bcec5bfc712c1b2d3105039eb7bf20fcaa", "commit_rev":
"1cac7368c762e81a39f70830be585e1b6d688a8f"}

[commit-bot: I haz the power, 2017-06-30 13:34:15]

Description was changed from

==========
Added UMA stat to track migration of profile_ever_initialized attribute.

BUG=736760
==========

to

==========
Added UMA stat to track migration of profile_ever_initialized attribute.

BUG=736760

Review-Url: https://codereview.chromium.org/2959733002
Cr-Commit-Position: refs/heads/master@{#483690}
Committed:
https://chromium.googlesource.com/chromium/src/+/1cac7368c762e81a39f70830be58...
==========

[commit-bot: I haz the power, 2017-06-30 13:34:16]

Committed patchset #2 (id:20001) as
https://chromium.googlesource.com/chromium/src/+/1cac7368c762e81a39f70830be58...