Remove Extensions.EnhancedBookmarksManagerNumEventListeners metric

Remove Extensions.EnhancedBookmarksManagerNumEventListeners metric

This is obsolete since the enhanced bookmarks manager is no longer using
an event page.

BUG=603149
Committed: https://crrev.com/3e9039124071c256c797a0b84ca150b89989f5fe
Cr-Commit-Position: refs/heads/master@{#387802}

[Mike Wittman, 2016-04-13 20:24:07]

wittman@chromium.org changed reviewers:
+ jwd@chromium.org, rdevlin.cronin@chromium.org

[Devlin, 2016-04-13 22:51:50]

lgtm

[jwd, 2016-04-15 14:55:26]

LGTM with small change.

https://codereview.chromium.org/1887783002/diff/1/tools/metrics/histograms/hi...
File tools/metrics/histograms/histograms.xml (right):

https://codereview.chromium.org/1887783002/diff/1/tools/metrics/histograms/hi...
tools/metrics/histograms/histograms.xml:13167: +    page.
Can you add the MM/YYYY for when this is obsoleted (so, 04/2016).

[Mike Wittman, 2016-04-15 15:06:19]

https://codereview.chromium.org/1887783002/diff/1/tools/metrics/histograms/hi...
File tools/metrics/histograms/histograms.xml (right):

https://codereview.chromium.org/1887783002/diff/1/tools/metrics/histograms/hi...
tools/metrics/histograms/histograms.xml:13167: +    page.
On 2016/04/15 14:55:26, Jesse Doherty wrote:
> Can you add the MM/YYYY for when this is obsoleted (so, 04/2016).

Putting an obsolescence date on this isn't useful and is potentially misleading,
as there was only a short window in which the data received was meaningful. I
don't see anyone looking at the historical data regardless.

[Mike Wittman, 2016-04-16 00:40:23]

The CQ bit was checked by wittman@chromium.org

[commit-bot: I haz the power, 2016-04-16 00:40:44]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1887783002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1887783002/1

[commit-bot: I haz the power, 2016-04-16 02:48:09]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-04-16 02:50:42]

Description was changed from

==========
Remove Extensions.EnhancedBookmarksManagerNumEventListeners metric

This is obsolete since the enhanced bookmarks manager is no longer using
an event page.

BUG=603149
==========

to

==========
Remove Extensions.EnhancedBookmarksManagerNumEventListeners metric

This is obsolete since the enhanced bookmarks manager is no longer using
an event page.

BUG=603149

Committed: https://crrev.com/3e9039124071c256c797a0b84ca150b89989f5fe
Cr-Commit-Position: refs/heads/master@{#387802}
==========

[commit-bot: I haz the power, 2016-04-16 02:50:43]

Patchset 1 (id:??) landed as
https://crrev.com/3e9039124071c256c797a0b84ca150b89989f5fe
Cr-Commit-Position: refs/heads/master@{#387802}