Fix accessibility of buttons inside Chrome menu

Fix accessibility of buttons inside Chrome menu

The Cut, Copy, Paste, Zoom In/Out, and Fullscreen
buttons inside the Chrome menu aren't working with
some Windows screen readers.

Fix them by firing the same event (AX_EVENT_SELECTION
internally) and using the same role (AX_ROLE_MENU_ITEM)
for these buttons as for any other items within the
menus.

Internally we consider them to be "buttons", but since
the keyboard behavior is to just linearize them,
from an accessibility perspective it makes more sense
to consider them to just be menu items.

BUG=593392
Committed: https://crrev.com/19211b57d72c9f80763494278659f0b2322a8e75
Cr-Commit-Position: refs/heads/master@{#393956}

[dmazzoni, 2016-05-16 20:57:13]

dmazzoni@chromium.org changed reviewers:
+ sky@chromium.org

[sky, 2016-05-16 21:15:55]

LGTM

[dmazzoni, 2016-05-16 21:23:08]

The CQ bit was checked by dmazzoni@chromium.org

[commit-bot: I haz the power, 2016-05-16 21:23:40]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1982073002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1982073002/1

[commit-bot: I haz the power, 2016-05-16 22:41:11]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-05-16 22:42:59]

Description was changed from

==========
Fix accessibility of buttons inside Chrome menu

The Cut, Copy, Paste, Zoom In/Out, and Fullscreen
buttons inside the Chrome menu aren't working with
some Windows screen readers.

Fix them by firing the same event (AX_EVENT_SELECTION
internally) and using the same role (AX_ROLE_MENU_ITEM)
for these buttons as for any other items within the
menus.

Internally we consider them to be "buttons", but since
the keyboard behavior is to just linearize them,
from an accessibility perspective it makes more sense
to consider them to just be menu items.

BUG=593392
==========

to

==========
Fix accessibility of buttons inside Chrome menu

The Cut, Copy, Paste, Zoom In/Out, and Fullscreen
buttons inside the Chrome menu aren't working with
some Windows screen readers.

Fix them by firing the same event (AX_EVENT_SELECTION
internally) and using the same role (AX_ROLE_MENU_ITEM)
for these buttons as for any other items within the
menus.

Internally we consider them to be "buttons", but since
the keyboard behavior is to just linearize them,
from an accessibility perspective it makes more sense
to consider them to just be menu items.

BUG=593392

Committed: https://crrev.com/19211b57d72c9f80763494278659f0b2322a8e75
Cr-Commit-Position: refs/heads/master@{#393956}
==========

[commit-bot: I haz the power, 2016-05-16 22:43:00]

Patchset 1 (id:??) landed as
https://crrev.com/19211b57d72c9f80763494278659f0b2322a8e75
Cr-Commit-Position: refs/heads/master@{#393956}