Remove Net.ProxyService.* histograms.

Remove Net.ProxyService.* histograms.

(While nice to have, these are not actively being used to improve the
product.)

BUG=614102
Review-Url: https://codereview.chromium.org/2963943003
Cr-Commit-Position: refs/heads/master@{#483788}
Committed: https://chromium.googlesource.com/chromium/src/+/4493f72260d11f313c747446eb24f6aefb4ad91c

[eroman, 2017-06-29 20:35:52]

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

[commit-bot: I haz the power, 2017-06-29 20:36:31]

Dry run: CQ is trying da patch.

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

[eroman, 2017-06-29 20:37:13]

eroman@chromium.org changed reviewers:
+ mmenke@chromium.org

[mmenke, 2017-06-29 20:41:23]

LGTM!

[eroman, 2017-06-29 20:54:50]

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

[eroman, 2017-06-29 20:54:50]

@rkaplow for histograms.xml approval.

[commit-bot: I haz the power, 2017-06-29 22:37:41]

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

[commit-bot: I haz the power, 2017-06-29 22:37:42]

Dry run: This issue passed the CQ dry run.

[rkaplow, 2017-06-30 13:50:30]

lgtm

[eroman, 2017-06-30 19:19:15]

The CQ bit was checked by eroman@chromium.org

[commit-bot: I haz the power, 2017-06-30 19:19:37]

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 19:25:03]

CQ is committing da patch.

Bot data: {"patchset_id": 20001, "attempt_start_ts": 1498850355039670,
"parent_rev": "3b5152538d133f59aa6709a0811ff6c745973cc6", "commit_rev":
"4493f72260d11f313c747446eb24f6aefb4ad91c"}

[commit-bot: I haz the power, 2017-06-30 19:25:17]

Description was changed from

==========
Remove Net.ProxyService.* histograms.

(While nice to have, these are not actively being used to improve the
product.)

BUG=614102
==========

to

==========
Remove Net.ProxyService.* histograms.

(While nice to have, these are not actively being used to improve the
product.)

BUG=614102

Review-Url: https://codereview.chromium.org/2963943003
Cr-Commit-Position: refs/heads/master@{#483788}
Committed:
https://chromium.googlesource.com/chromium/src/+/4493f72260d11f313c747446eb24...
==========

[commit-bot: I haz the power, 2017-06-30 19:25:20]

Committed patchset #2 (id:20001) as
https://chromium.googlesource.com/chromium/src/+/4493f72260d11f313c747446eb24...