Add navigation hint ServiceWorkerMetrics.EventType enums in histograms.xml

Add navigation hint ServiceWorkerMetrics.EventType enums in histograms.xml

I had to add them in https://codereview.chromium.org/2052613003

BUG=616502
Committed: https://crrev.com/a7e7439065dd32570ac2aabaf5557470294a43c0
Cr-Commit-Position: refs/heads/master@{#414363}

[horo, 2016-08-24 06:44:07]

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

[horo, 2016-08-24 06:44:15]

horo@chromium.org changed reviewers:
+ mpearson@chromium.org

[horo, 2016-08-24 06:44:16]

mpearson@
Please review this.

[commit-bot: I haz the power, 2016-08-24 06:44:29]

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 09:36:55]

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

[commit-bot: I haz the power, 2016-08-24 09:36:56]

Dry run: 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_...)

[Mark P, 2016-08-24 20:56:57]

lgtm

[horo, 2016-08-24 22:18:44]

The CQ bit was checked by horo@chromium.org

[commit-bot: I haz the power, 2016-08-24 22:20:33]

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 01:12:05]

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

[commit-bot: I haz the power, 2016-08-25 01:12:06]

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_...)

[horo, 2016-08-25 05:07:55]

The CQ bit was checked by horo@chromium.org

[commit-bot: I haz the power, 2016-08-25 05:08:14]

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 08:36:38]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-08-25 08:37:49]

Description was changed from

==========
Add navigation hint ServiceWorkerMetrics.EventType enums in histograms.xml

I had to add them in https://codereview.chromium.org/2052613003

BUG=616502
==========

to

==========
Add navigation hint ServiceWorkerMetrics.EventType enums in histograms.xml

I had to add them in https://codereview.chromium.org/2052613003

BUG=616502

Committed: https://crrev.com/a7e7439065dd32570ac2aabaf5557470294a43c0
Cr-Commit-Position: refs/heads/master@{#414363}
==========

[commit-bot: I haz the power, 2016-08-25 08:37:50]

Patchset 1 (id:??) landed as
https://crrev.com/a7e7439065dd32570ac2aabaf5557470294a43c0
Cr-Commit-Position: refs/heads/master@{#414363}