The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/4c43d568f440a09f116b23cafd8ba065021b0ff2

commit 4c43d568f440a09f116b23cafd8ba065021b0ff2
Author: Sammie Quon <sammiequon@google.com>
Date: Thu Sep 28 00:35:35 2017

a11y: Make actionable_view and tray_item_more use button's accessible
name members.

It seems some subclass of actionable_view which use SetAccessibleName
actually use button's impl of SetAccessibleName which then leaves
|accessible_name_| empty in actionable_view, so ChromeVox will then not
read anything. There is at least one instance which occurs in system
tray, the audio settings button (the other actionable_views are not
affected because they have their own GetAVXNodeData impl's).

This cl removes SetAccessibleName and accessible_name_ from subclasses
of Button. These classes will just use Button::SetAccessibleName and
Button::accessible_name() instead.

Test: manual
Bug:  747469 
Change-Id: I03bde6e90ed3b22321585eccccb4cc2c32e5b5ef
Reviewed-on: https://chromium-review.googlesource.com/678061
Commit-Queue: Sammie Quon <sammiequon@chromium.org>
Reviewed-by: Sadrul Chowdhury <sadrul@chromium.org>
Cr-Commit-Position: refs/heads/master@{#504814}
[modify] https://crrev.com/4c43d568f440a09f116b23cafd8ba065021b0ff2/ash/system/tray/actionable_view.cc
[modify] https://crrev.com/4c43d568f440a09f116b23cafd8ba065021b0ff2/ash/system/tray/actionable_view.h
[modify] https://crrev.com/4c43d568f440a09f116b23cafd8ba065021b0ff2/ash/system/tray/tray_item_more.cc
[modify] https://crrev.com/4c43d568f440a09f116b23cafd8ba065021b0ff2/ash/system/tray/tray_item_more.h
[modify] https://crrev.com/4c43d568f440a09f116b23cafd8ba065021b0ff2/ui/views/controls/button/button.cc
[modify] https://crrev.com/4c43d568f440a09f116b23cafd8ba065021b0ff2/ui/views/controls/button/button.h