The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/c2a98867e5af54126384d4809c42638e6494f918

commit c2a98867e5af54126384d4809c42638e6494f918
Author: Zach Helfinstein <zhelfins@chromium.org>
Date: Wed May 23 00:46:46 2018

Make switch access settings button behave properly

Also modify it to look like buttons for ChromeVox / Select to Speak

Bug:  842242 
Cq-Include-Trybots: master.tryserver.chromium.linux:closure_compilation
Change-Id: I1dfa42917ac35d13f300090e92672f8f62e3d798
Reviewed-on: https://chromium-review.googlesource.com/1055770
Commit-Queue: Zach Helfinstein <zhelfins@chromium.org>
Reviewed-by: David Tseng <dtseng@chromium.org>
Reviewed-by: Steven Bennetts <stevenjb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#560860}
[modify] https://crrev.com/c2a98867e5af54126384d4809c42638e6494f918/chrome/browser/resources/chromeos/switch_access/manifest.json.jinja2
[modify] https://crrev.com/c2a98867e5af54126384d4809c42638e6494f918/chrome/browser/resources/settings/a11y_page/manage_a11y_page.html