The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/39c185606b8153fe182be00a7a4987aacf86acd6

commit 39c185606b8153fe182be00a7a4987aacf86acd6
Author: Katie D <katie@chromium.org>
Date: Tue Jun 05 16:44:40 2018

Accessibility fixes for Virtual Keyboard: Use role 'button', fix space label.

With role of 'button', Chromevox and Select-to-Speak will draw a focus rect
around the entire area of a button instead of just around the inlineTextBox
(i.e. the letter 'a' or 'b').

The spacebar was being read as "English", but should be read as "Space", this
hooks up setting the content description as well.

Bug:  846823 , 846822 
Change-Id: I03846b3f823fefd45b3a9fe1bd2feac0c1094ed3
Reviewed-on: https://chromium-review.googlesource.com/1073641
Reviewed-by: David Tseng <dtseng@chromium.org>
Reviewed-by: Shu Chen <shuchen@chromium.org>
Commit-Queue: Katie Dektar <katie@chromium.org>
Cr-Commit-Position: refs/heads/master@{#564538}
[modify] https://crrev.com/39c185606b8153fe182be00a7a4987aacf86acd6/third_party/google_input_tools/src/chrome/os/inputview/elements/content/characterkey.js
[modify] https://crrev.com/39c185606b8153fe182be00a7a4987aacf86acd6/third_party/google_input_tools/src/chrome/os/inputview/elements/content/functionalkey.js
[modify] https://crrev.com/39c185606b8153fe182be00a7a4987aacf86acd6/third_party/google_input_tools/src/chrome/os/inputview/elements/content/material/spacekey.js
[modify] https://crrev.com/39c185606b8153fe182be00a7a4987aacf86acd6/third_party/google_input_tools/src/chrome/os/inputview/elements/content/spacekey.js