Add UKM logging of UPI-VPA autocomplete hints.

Add UKM logging of UPI-VPA autocomplete hints.

BUG=702220
Review-Url: https://codereview.chromium.org/2793533003
Cr-Commit-Position: refs/heads/master@{#461171}
Committed: https://chromium.googlesource.com/chromium/src/+/6eea7c4fa2707c1a33899892150af62d14ef9b54

[Roger McFarlane (Chromium), 2017-03-31 15:45:25]

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

[commit-bot: I haz the power, 2017-03-31 15:45:57]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[Roger McFarlane (Chromium), 2017-03-31 15:46:15]

rogerm@chromium.org changed reviewers:
+ csashi@google.com, mathp@chromium.org

[Roger McFarlane (Chromium), 2017-03-31 15:46:16]

PTAL?

[csashi, 2017-03-31 16:25:24]

lgtm

LGTM. Thanks for adding this metric.
-sashi.

[csashi, 2017-03-31 16:25:26]

lgtm

LGTM. Thanks for adding this metric.
-sashi.

[Mathieu, 2017-03-31 16:40:13]

lgtm

[Mathieu, 2017-03-31 16:40:18]

The CQ bit was checked by mathp@chromium.org

[Mathieu, 2017-03-31 16:40:19]

The CQ bit was unchecked by mathp@chromium.org

[Mathieu, 2017-03-31 16:50:01]

The CQ bit was checked by mathp@chromium.org

[commit-bot: I haz the power, 2017-03-31 16:50:49]

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, 2017-03-31 18:11:43]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1490979001110170, "parent_rev":
"5eda1f753751a5c38367cd4f3db8fbf38c180d40", "commit_rev":
"6eea7c4fa2707c1a33899892150af62d14ef9b54"}

[commit-bot: I haz the power, 2017-03-31 18:12:30]

Description was changed from

==========
Add UKM logging of UPI-VPA autocomplete hints.

BUG=702220
==========

to

==========
Add UKM logging of UPI-VPA autocomplete hints.

BUG=702220

Review-Url: https://codereview.chromium.org/2793533003
Cr-Commit-Position: refs/heads/master@{#461171}
Committed:
https://chromium.googlesource.com/chromium/src/+/6eea7c4fa2707c1a33899892150a...
==========

[commit-bot: I haz the power, 2017-03-31 18:12:32]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/6eea7c4fa2707c1a33899892150a...