It should be fixed on ToT now - Play ToS should not be displayed.

However, we recently decided to disallow demo mode on devices that do not support ARC++. This bug track that.

michaelpg@ Can you confirm that I remember the decision correctly?   

Yes, Demo Mode won't be supported on devices that don't support ARC++.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/1de54d4ef4f143e74fbae9286ea3f16480b2f4d3

commit 1de54d4ef4f143e74fbae9286ea3f16480b2f4d3
Author: Aga Wronska <agawronska@chromium.org>
Date: Wed Aug 15 02:45:04 2018

Disallow demo mode on devices that do not support ARC++.

Bug:  868105 
Test: DemoSetupTest, DemoSetupArcUnsupportedTest
Change-Id: I5b4616c620dabf11704a02fd9345e22515e5a373
Reviewed-on: https://chromium-review.googlesource.com/1164560
Commit-Queue: Aga Wronska <agawronska@chromium.org>
Reviewed-by: Toni Baržić <tbarzic@chromium.org>
Reviewed-by: Michael Giuffrida <michaelpg@chromium.org>
Reviewed-by: Jacob Dufault <jdufault@chromium.org>
Cr-Commit-Position: refs/heads/master@{#583137}
[modify] https://crrev.com/1de54d4ef4f143e74fbae9286ea3f16480b2f4d3/chrome/browser/chromeos/login/demo_mode/demo_setup_controller.cc
[modify] https://crrev.com/1de54d4ef4f143e74fbae9286ea3f16480b2f4d3/chrome/browser/chromeos/login/demo_mode/demo_setup_controller.h
[modify] https://crrev.com/1de54d4ef4f143e74fbae9286ea3f16480b2f4d3/chrome/browser/chromeos/login/demo_setup_browsertest.cc
[modify] https://crrev.com/1de54d4ef4f143e74fbae9286ea3f16480b2f4d3/chrome/browser/ui/webui/chromeos/login/core_oobe_handler.cc
[modify] https://crrev.com/1de54d4ef4f143e74fbae9286ea3f16480b2f4d3/chrome/browser/ui/webui/chromeos/login/network_screen_handler.cc