Add an UMA histogram for WebUSB function calls.

Add an UMA histogram for WebUSB function calls.

Each WebUSB function (on the USB and USBDevice IDL objects) is given a
histogram value that is recorded when the function is called.

BUG=492204
Committed: https://crrev.com/9882e9ddab06dd2acc556707d0feb8c129a8b3c3
Cr-Commit-Position: refs/heads/master@{#414367}

[Reilly Grant (use Gerrit), 2016-08-23 19:59:41]

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

[commit-bot: I haz the power, 2016-08-23 20:00:10]

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

[Reilly Grant (use Gerrit), 2016-08-23 20:00:33]

reillyg@chromium.org changed reviewers:
+ holte@chromium.org

[Reilly Grant (use Gerrit), 2016-08-23 20:00:34]

Please take a look, this is the first time I've added a histogram in Blink and I
want to be sure I'm doing it correctly.

[commit-bot: I haz the power, 2016-08-23 21:31:04]

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

[commit-bot: I haz the power, 2016-08-23 21:31:05]

Dry run: Try jobs failed on following builders:
  linux_android_rel_ng on master.tryserver.chromium.android (JOB_FAILED,
https://build.chromium.org/p/tryserver.chromium.android/builders/linux_androi...)

[haraken, 2016-08-24 01:13:18]

haraken@chromium.org changed reviewers:
+ haraken@chromium.org

[haraken, 2016-08-24 01:13:19]

https://codereview.chromium.org/2272563003/diff/20001/third_party/WebKit/Sour...
File third_party/WebKit/Source/modules/webusb/USBMetrics.h (right):

https://codereview.chromium.org/2272563003/diff/20001/third_party/WebKit/Sour...
third_party/WebKit/Source/modules/webusb/USBMetrics.h:29: UsbDeviceReset = 15,

I'd prefer centralizing all UMA metrics in UseCounter.h instead of adding
localized metrics to each directory though.

[Steven Holte, 2016-08-24 01:54:09]

histograms lgtm

[Reilly Grant (use Gerrit), 2016-08-24 20:05:13]

Switch to UseCounter.h.

[Reilly Grant (use Gerrit), 2016-08-24 20:05:36]

On 2016/08/24 at 01:13:19, haraken wrote:
> I'd prefer centralizing all UMA metrics in UseCounter.h instead of adding
localized metrics to each directory though.

Done.

[Reilly Grant (use Gerrit), 2016-08-24 20:05:40]

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

[commit-bot: I haz the power, 2016-08-24 20:06:38]

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, 2016-08-24 20:10:34]

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

[commit-bot: I haz the power, 2016-08-24 20:10:35]

Dry run: Try jobs failed on following builders:
  ios-device on master.tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/ios-device/builds...)
  ios-simulator on master.tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/ios-simulator/bui...)
  mac_chromium_compile_dbg_ng on master.tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/mac_chromium_comp...)
  mac_chromium_rel_ng on master.tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/mac_chromium_rel_...)

[Reilly Grant (use Gerrit), 2016-08-24 20:25:26]

Rebased.

[Reilly Grant (use Gerrit), 2016-08-24 20:25:29]

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

[commit-bot: I haz the power, 2016-08-24 20:26:15]

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

[haraken, 2016-08-24 22:54:17]

LGTM

[commit-bot: I haz the power, 2016-08-24 23:27:45]

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

[commit-bot: I haz the power, 2016-08-24 23:27:46]

Dry run: This issue passed the CQ dry run.

[Reilly Grant (use Gerrit), 2016-08-24 23:29:24]

The CQ bit was checked by reillyg@chromium.org

[Reilly Grant (use Gerrit), 2016-08-24 23:29:25]

The patchset sent to the CQ was uploaded after l-g-t-m from holte@chromium.org
Link to the patchset: https://codereview.chromium.org/2272563003/#ps60001
(title: "Rebased.")

[commit-bot: I haz the power, 2016-08-24 23:30:42]

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, 2016-08-24 23:49:52]

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

[commit-bot: I haz the power, 2016-08-24 23:49:53]

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...)

[Reilly Grant (use Gerrit), 2016-08-25 00:33:16]

Rebased.

[Reilly Grant (use Gerrit), 2016-08-25 00:34:40]

The CQ bit was checked by reillyg@chromium.org

[Reilly Grant (use Gerrit), 2016-08-25 00:34:41]

The patchset sent to the CQ was uploaded after l-g-t-m from
haraken@chromium.org, holte@chromium.org
Link to the patchset: https://codereview.chromium.org/2272563003/#ps80001
(title: "Rebased.")

[commit-bot: I haz the power, 2016-08-25 00:35:30]

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, 2016-08-25 04:30:42]

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

[commit-bot: I haz the power, 2016-08-25 04:30:43]

Try jobs failed on following builders:
  win_chromium_rel_ng on master.tryserver.chromium.win (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_rel_...)

[Reilly Grant (use Gerrit), 2016-08-25 04:43:37]

The CQ bit was checked by reillyg@chromium.org

[commit-bot: I haz the power, 2016-08-25 04:43:58]

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, 2016-08-25 09:07:08]

Committed patchset #5 (id:80001)

[commit-bot: I haz the power, 2016-08-25 09:11:41]

Description was changed from

==========
Add an UMA histogram for WebUSB function calls.

Each WebUSB function (on the USB and USBDevice IDL objects) is given a
histogram value that is recorded when the function is called.

BUG=492204
==========

to

==========
Add an UMA histogram for WebUSB function calls.

Each WebUSB function (on the USB and USBDevice IDL objects) is given a
histogram value that is recorded when the function is called.

BUG=492204

Committed: https://crrev.com/9882e9ddab06dd2acc556707d0feb8c129a8b3c3
Cr-Commit-Position: refs/heads/master@{#414367}
==========

[commit-bot: I haz the power, 2016-08-25 09:11:43]

Patchset 5 (id:??) landed as
https://crrev.com/9882e9ddab06dd2acc556707d0feb8c129a8b3c3
Cr-Commit-Position: refs/heads/master@{#414367}