Added back onContextMenuClosed

Added back onContextMenuClosed

In https://codereview.chromium.org/2360103002/ onContextMenuClosed shouldn't have been completely removed. This CL adds back the parts that were removed by mistake.

BUG=

[amaralp, 2016-09-28 17:58:45]

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

[commit-bot: I haz the power, 2016-09-28 17:59:18]

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

[amaralp, 2016-09-28 17:59:45]

Description was changed from

==========
Added back onContextMenuClosed


BUG=
==========

to

==========
Added back onContextMenuClosed

In https://codereview.chromium.org/2360103002/ onContextMenuClosed shouldn't
have been completely removed. This CL adds back the parts that were removed by
mistake.

BUG=
==========

[amaralp, 2016-09-28 18:04:32]

amaralp@chromium.org changed reviewers:
+ peconn@chromium.org, tedchoc@chromium.org

[amaralp, 2016-09-28 18:05:09]

PTAL

[commit-bot: I haz the power, 2016-09-28 18:19:21]

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

[commit-bot: I haz the power, 2016-09-28 18:19:21]

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...)

[amaralp, 2016-09-28 18:27:24]

The CQ bit was unchecked by amaralp@chromium.org

[amaralp, 2016-09-28 18:29:19]

On 2016/09/28 at 18:05:09, amaralp wrote:
> PTAL

Looks like this was already fixed in https://codereview.chromium.org/2381473002
so closing this CL.