MacViews: Fix receiving of mouseexit events.

MacViews: Fix receiving of mouseexit events.

BUG=659959
R=tapted@chromium.org

Committed: https://crrev.com/eb34893a38b1baaef95c1f1d4e17e0c774794f43
Cr-Commit-Position: refs/heads/master@{#429454}

[tapted, 2016-11-02 23:10:46]

lgtm - thanks!

(regarding tests for this - we could try injecting events into the carbon event
tap and see if whether AppKit converts them correctly into enter/exit. But doing
that in a robust way that works on bots isn't worth the effort, IMO. And we're
basically testing AppKit then, not our code).

[snake, 2016-11-02 23:15:42]

The CQ bit was checked by art-snake@yandex-team.ru

[commit-bot: I haz the power, 2016-11-02 23:16:19]

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, 2016-11-02 23:39:11]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-11-02 23:41:22]

Description was changed from

==========
MacViews: Fix receiving of mouseexit events.

BUG=659959
R=tapted@chromium.org
==========

to

==========
MacViews: Fix receiving of mouseexit events.

BUG=659959
R=tapted@chromium.org

Committed: https://crrev.com/eb34893a38b1baaef95c1f1d4e17e0c774794f43
Cr-Commit-Position: refs/heads/master@{#429454}
==========

[commit-bot: I haz the power, 2016-11-02 23:41:23]

Patchset 1 (id:??) landed as
https://crrev.com/eb34893a38b1baaef95c1f1d4e17e0c774794f43
Cr-Commit-Position: refs/heads/master@{#429454}