The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/d88add7f5434cbc4da352eaad54424abe7ed7770

commit d88add7f5434cbc4da352eaad54424abe7ed7770
Author: James Cook <jamescook@chromium.org>
Date: Mon Dec 17 23:28:07 2018

chromeos: Add SingleProcessMash warning label to wallpaper view

For consistency with the lock screen version info, and to make things
a little less obvious. Remove the shelf warning button.

See bug for screenshot

Bug:  915812 
Change-Id: I16e3d27ff8dffc6d85fe8372fa795e638a59c2b9
Reviewed-on: https://chromium-review.googlesource.com/c/1380802
Reviewed-by: Michael Wasserman <msw@chromium.org>
Commit-Queue: James Cook <jamescook@chromium.org>
Cr-Commit-Position: refs/heads/master@{#617282}
[modify] https://crrev.com/d88add7f5434cbc4da352eaad54424abe7ed7770/ash/shelf/shelf_view_unittest.cc
[modify] https://crrev.com/d88add7f5434cbc4da352eaad54424abe7ed7770/ash/system/flag_warning/flag_warning_tray.cc
[modify] https://crrev.com/d88add7f5434cbc4da352eaad54424abe7ed7770/ash/system/status_area_widget.cc
[modify] https://crrev.com/d88add7f5434cbc4da352eaad54424abe7ed7770/ash/wallpaper/wallpaper_view.cc