I think all the files in c/b/r/chromeos/login which have a md_* version can be removed.

The files in ui/login/ have md_ versions as well, but the non_md_ versions are still being used by md_user_manager.

We should note any remaining examples where both md_ and non md_ versions exist and file a separate issue to clean that up.

Not all of them can be removed.
Many are used in both versions.

I'd start by removing methods that appear to no longer be called.

The login screen is still using some of the md_* files as well. Those should go away when views-login launches.

The files I am suggesting to delete are:
and there corresponding .js and .css files.

header_bar.html - [1] only included by screen_container.html
lock.html
login.html - [4] these two are attached as a resource which is no longer used once switch is gone.
lock_screens.html
login_screens.html - [5] not sure about these two, they are including as [OOBE]_screens.html in *screen_container.html.
login_shared.html - [2] only included by lock.html & login.html
screen_container.html - [3] only included by lock.html & login.html

[1] https://cs.chromium.org/search/?q=%5Cbheader_bar.html&type=cs
[2] https://cs.chromium.org/search/?q=%5Cblogin_shared.html&type=cs
[3] https://cs.chromium.org/search/?q=%5Cbscreen_container.html&type=cs
[4] https://cs.chromium.org/chromium/src/chrome/browser/ui/webui/chromeos/login/oobe_ui.cc?rcl=ecdb1462f5e9e86a0115e145abdbd6ffa442304e&l=148
[5] https://cs.chromium.org/search/?q=_screens.html&type=cs

fwiw, it passes the trybots

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/681287281efc60e4505f92108b3f7fc626744083

commit 681287281efc60e4505f92108b3f7fc626744083
Author: Sammie Quon <sammiequon@google.com>
Date: Tue Feb 13 23:43:25 2018

cros: Remove kShowNonMdLogin switch.

Delete the resources files later.

Test: trybots
Bug:  810170 
Cq-Include-Trybots: master.tryserver.chromium.linux:closure_compilation
Change-Id: I8f956cb00ba2dcbe7f581f96115bef9a601e9fac
Reviewed-on: https://chromium-review.googlesource.com/907690
Commit-Queue: Sammie Quon <sammiequon@chromium.org>
Reviewed-by: Alexander Alekseev <alemate@chromium.org>
Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#536553}
[modify] https://crrev.com/681287281efc60e4505f92108b3f7fc626744083/chrome/browser/browser_resources.grd
[modify] https://crrev.com/681287281efc60e4505f92108b3f7fc626744083/chrome/browser/chromeos/login/chrome_restart_request.cc
[modify] https://crrev.com/681287281efc60e4505f92108b3f7fc626744083/chrome/browser/ui/webui/chromeos/login/oobe_ui.cc
[modify] https://crrev.com/681287281efc60e4505f92108b3f7fc626744083/chromeos/chromeos_switches.cc
[modify] https://crrev.com/681287281efc60e4505f92108b3f7fc626744083/chromeos/chromeos_switches.h