Add UseCounters for Event.cancelBubble behavior.

Add UseCounters for Event.cancelBubble behavior.

https://github.com/whatwg/dom/issues/211#issuecomment-209395525
> 1. How often cancelBubble is changed from false to true (likely common) and
>   from true to false (hopefully rare).
> 2. How often the cancelBubble flag actually changes which callbacks are
>   invoked (hopefully rare).

BUG=603377
TBR=isherman@chromium.org

Committed: https://crrev.com/5cc4cd4c058dbcb324ccf18d6e3b7ce1cea532ec
Cr-Commit-Position: refs/heads/master@{#393784}

[tkent, 2016-05-12 05:59:14]

Description was changed from

==========
Add UseCounters for Event.cancelBubble behavior.

https://github.com/whatwg/dom/issues/211#issuecomment-209395525
> 1. How often cancelBubble is changed from false to true (likely common) and
> from true to false (hopefully rare).
> 2. How often the cancelBubble flag actually changes which callbacks are
>  invoked (hopefully rare).

BUG=603377
==========

to

==========
Add UseCounters for Event.cancelBubble behavior.

https://github.com/whatwg/dom/issues/211#issuecomment-209395525
> 1. How often cancelBubble is changed from false to true (likely common) and
>   from true to false (hopefully rare).
> 2. How often the cancelBubble flag actually changes which callbacks are
>   invoked (hopefully rare).

BUG=603377
==========

[tkent, 2016-05-12 08:01:43]

tkent@chromium.org changed reviewers:
+ rbyers@chromium.org

[tkent, 2016-05-12 08:01:44]

Rick, would you review this please?

[Rick Byers, 2016-05-13 18:46:47]

LGTM

[tkent, 2016-05-15 22:57:19]

Description was changed from

==========
Add UseCounters for Event.cancelBubble behavior.

https://github.com/whatwg/dom/issues/211#issuecomment-209395525
> 1. How often cancelBubble is changed from false to true (likely common) and
>   from true to false (hopefully rare).
> 2. How often the cancelBubble flag actually changes which callbacks are
>   invoked (hopefully rare).

BUG=603377
==========

to

==========
Add UseCounters for Event.cancelBubble behavior.

https://github.com/whatwg/dom/issues/211#issuecomment-209395525
> 1. How often cancelBubble is changed from false to true (likely common) and
>   from true to false (hopefully rare).
> 2. How often the cancelBubble flag actually changes which callbacks are
>   invoked (hopefully rare).

BUG=603377
TBR=isherman@chromium.org
==========

[tkent, 2016-05-15 22:57:20]

tkent@chromium.org changed reviewers:
+ isherman@chromium.org

[tkent, 2016-05-15 22:57:33]

TBRing isherman@chromium.org for histogram.xml.

[tkent, 2016-05-15 22:57:37]

The CQ bit was checked by tkent@chromium.org

[commit-bot: I haz the power, 2016-05-15 22:57:47]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1972053002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1972053002/1

[commit-bot: I haz the power, 2016-05-16 02:27:22]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-05-16 02:28:49]

Description was changed from

==========
Add UseCounters for Event.cancelBubble behavior.

https://github.com/whatwg/dom/issues/211#issuecomment-209395525
> 1. How often cancelBubble is changed from false to true (likely common) and
>   from true to false (hopefully rare).
> 2. How often the cancelBubble flag actually changes which callbacks are
>   invoked (hopefully rare).

BUG=603377
TBR=isherman@chromium.org
==========

to

==========
Add UseCounters for Event.cancelBubble behavior.

https://github.com/whatwg/dom/issues/211#issuecomment-209395525
> 1. How often cancelBubble is changed from false to true (likely common) and
>   from true to false (hopefully rare).
> 2. How often the cancelBubble flag actually changes which callbacks are
>   invoked (hopefully rare).

BUG=603377
TBR=isherman@chromium.org

Committed: https://crrev.com/5cc4cd4c058dbcb324ccf18d6e3b7ce1cea532ec
Cr-Commit-Position: refs/heads/master@{#393784}
==========

[commit-bot: I haz the power, 2016-05-16 02:28:50]

Patchset 1 (id:??) landed as
https://crrev.com/5cc4cd4c058dbcb324ccf18d6e3b7ce1cea532ec
Cr-Commit-Position: refs/heads/master@{#393784}

[Ilya Sherman, 2016-05-17 03:17:52]

histograms.xml lgtm