Add data usage tracking for supervised_user service

Add data usage tracking for supervised_user service

BUG=655749
Review-Url: https://codereview.chromium.org/2644223003
Cr-Commit-Position: refs/heads/master@{#445247}
Committed: https://chromium.googlesource.com/chromium/src/+/937e6ddb752843acbff843c01fabb29518f3aba5

[Raj, 2017-01-20 20:14:59]

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

[commit-bot: I haz the power, 2017-01-20 20:15:23]

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, 2017-01-20 21:26:04]

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

[commit-bot: I haz the power, 2017-01-20 21:26:05]

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

[Raj, 2017-01-20 21:45:21]

rajendrant@chromium.org changed reviewers:
+ holte@chromium.org, sky@chromium.org, tbansal@chromium.org

[Raj, 2017-01-20 21:45:21]

sky: ptal chrome/browser/supervised_user/DEPS

tbansal: ptal data_use_user_data.*

holte: ptal histograms.xml

[Steven Holte, 2017-01-20 22:15:36]

histograms lgtm

[sky, 2017-01-21 00:21:33]

LGTM

[tbansal1, 2017-01-21 00:22:49]

lgtm

[Raj, 2017-01-21 00:26:57]

The CQ bit was checked by rajendrant@chromium.org

[commit-bot: I haz the power, 2017-01-21 00:27:16]

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, 2017-01-21 00:34:31]

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

[commit-bot: I haz the power, 2017-01-21 00:34:32]

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

[Raj, 2017-01-21 00:38:32]

The CQ bit was checked by rajendrant@chromium.org

[Raj, 2017-01-21 00:38:33]

The patchset sent to the CQ was uploaded after l-g-t-m from sky@chromium.org,
holte@chromium.org, tbansal@chromium.org
Link to the patchset: https://codereview.chromium.org/2644223003/#ps20001
(title: "rebased")

[commit-bot: I haz the power, 2017-01-21 00:39:03]

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, 2017-01-21 01:50:39]

CQ is committing da patch.

Bot data: {"patchset_id": 20001, "attempt_start_ts": 1484959112657090,
"parent_rev": "04c128afb8f510dab3690a53c532b924fdf58b6e", "commit_rev":
"937e6ddb752843acbff843c01fabb29518f3aba5"}

[commit-bot: I haz the power, 2017-01-21 01:51:31]

Description was changed from

==========
Add data usage tracking for supervised_user service

BUG=655749
==========

to

==========
Add data usage tracking for supervised_user service

BUG=655749

Review-Url: https://codereview.chromium.org/2644223003
Cr-Commit-Position: refs/heads/master@{#445247}
Committed:
https://chromium.googlesource.com/chromium/src/+/937e6ddb752843acbff843c01fab...
==========

[commit-bot: I haz the power, 2017-01-21 01:51:43]

Committed patchset #2 (id:20001) as
https://chromium.googlesource.com/chromium/src/+/937e6ddb752843acbff843c01fab...