[Extensions] Add metrics for extension initialization

[Extensions] Add metrics for extension initialization

Add a histogram to analyze extension initialization time.

BUG=677299
Review-Url: https://codereview.chromium.org/2607773003
Cr-Commit-Position: refs/heads/master@{#442760}
Committed: https://chromium.googlesource.com/chromium/src/+/c9f9c596f4d35ec6d14ff78f8be7a08bfc989041

[Devlin, 2016-12-28 20:46:00]

rdevlin.cronin@chromium.org changed reviewers:
+ lazyboy@chromium.org, mpearson@chromium.org

[Devlin, 2016-12-28 20:46:01]

Hey folks, mind taking a look?

[lazyboy, 2017-01-05 00:17:02]

extension.cc lgtm.

[Mark P, 2017-01-05 22:51:25]

lgtm with one comment

--mark

https://codereview.chromium.org/2607773003/diff/20001/tools/metrics/histogram...
File tools/metrics/histograms/histograms.xml (right):

https://codereview.chromium.org/2607773003/diff/20001/tools/metrics/histogram...
tools/metrics/histograms/histograms.xml:114088: +  <suffix
name="RendererProcess" label="Renderer Process (non-extension)"/>
Is there such thing as an "extension renderer process" different than a
"extension process"?  If not, I suggest the following change:
(non-extension)
->
(not an extension process)
or remove the parenthetical remark entirely.

[Devlin, 2017-01-10 23:17:14]

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

[Devlin, 2017-01-10 23:17:17]

https://codereview.chromium.org/2607773003/diff/20001/tools/metrics/histogram...
File tools/metrics/histograms/histograms.xml (right):

https://codereview.chromium.org/2607773003/diff/20001/tools/metrics/histogram...
tools/metrics/histograms/histograms.xml:114088: +  <suffix
name="RendererProcess" label="Renderer Process (non-extension)"/>
On 2017/01/05 22:51:24, Mark P wrote:
> Is there such thing as an "extension renderer process" different than a
> "extension process"?  If not, I suggest the following change:
> (non-extension)
> ->
> (not an extension process)
> or remove the parenthetical remark entirely.

I went with the change -> (not an extension process).  I think the distinction
is important, since technically extension processes are all renderer processes.

[commit-bot: I haz the power, 2017-01-10 23:17:47]

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, 2017-01-11 00:49:30]

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

[commit-bot: I haz the power, 2017-01-11 00:49:31]

Dry run: This issue passed the CQ dry run.

[Devlin, 2017-01-11 01:28:54]

The CQ bit was checked by rdevlin.cronin@chromium.org

[Devlin, 2017-01-11 01:28:55]

The patchset sent to the CQ was uploaded after l-g-t-m from
lazyboy@chromium.org, mpearson@chromium.org
Link to the patchset: https://codereview.chromium.org/2607773003/#ps40001
(title: "Mark's")

[commit-bot: I haz the power, 2017-01-11 01:29:29]

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, 2017-01-11 01:35:05]

CQ is committing da patch.

Bot data: {"patchset_id": 40001, "attempt_start_ts": 1484098134982780,
"parent_rev": "44aec8013cedf62952664272b787bbbfd51d4375", "commit_rev":
"c9f9c596f4d35ec6d14ff78f8be7a08bfc989041"}

[commit-bot: I haz the power, 2017-01-11 01:35:35]

Description was changed from

==========
[Extensions] Add metrics for extension initialization

Add a histogram to analyze extension initialization time.

BUG=677299
==========

to

==========
[Extensions] Add metrics for extension initialization

Add a histogram to analyze extension initialization time.

BUG=677299

Review-Url: https://codereview.chromium.org/2607773003
Cr-Commit-Position: refs/heads/master@{#442760}
Committed:
https://chromium.googlesource.com/chromium/src/+/c9f9c596f4d35ec6d14ff78f8be7...
==========

[commit-bot: I haz the power, 2017-01-11 01:35:36]

Committed patchset #3 (id:40001) as
https://chromium.googlesource.com/chromium/src/+/c9f9c596f4d35ec6d14ff78f8be7...