Per a11y policy, this is must-have for M66.

New screenshot is attached.

Deleted: Screenshot from 2018-02-28 14:43:52.png 32.0 KB

	Screenshot from 2018-02-28 14:43:52.png 32.0 KB View Download

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/31e8f4d061c3f1d7dd1b3baea9b4be8a1d5f81be

commit 31e8f4d061c3f1d7dd1b3baea9b4be8a1d5f81be
Author: Alexander Alekseev <alemate@chromium.org>
Date: Thu Mar 01 05:18:14 2018

Chrome OS OOBE: Improve a11y in Advanced options screen.

This CL adds native <button> elements to make screen more accessible.


Bug:  805490 
Cq-Include-Trybots: master.tryserver.chromium.linux:closure_compilation
Change-Id: I6ef14545ac7ef6484afe83c3e58166c2c3aea6fc
Reviewed-on: https://chromium-review.googlesource.com/941509
Reviewed-by: Wenzhao (Colin) Zang <wzang@chromium.org>
Commit-Queue: Alexander Alekseev <alemate@chromium.org>
Cr-Commit-Position: refs/heads/master@{#540060}
[modify] https://crrev.com/31e8f4d061c3f1d7dd1b3baea9b4be8a1d5f81be/chrome/browser/resources/chromeos/login/oobe_welcome.css
[modify] https://crrev.com/31e8f4d061c3f1d7dd1b3baea9b4be8a1d5f81be/chrome/browser/resources/chromeos/login/oobe_welcome.html

[Auto-generated comment by a script] We noticed that this issue is targeted for M-66; it appears the fix may have landed after branch point, meaning a merge might be required. Please confirm if a merge is required here - if so add Merge-Request-66 label, otherwise remove Merge-TBD label. Thanks.