GitLab

Hooked up CupsPrintersManager to receive update callbacks whenever the
value of the UserPrintersAllowed pref is changed. If the pref is set to
false then CupsPrintersManager will disallow any changes made to
non-enterprise printers.

R=skau@chromium.org

CQ-DEPEND=CL:972627

Bug: 827016
Change-Id: Id35de08fee33106f0122af07eea572757aae9c5f
Reviewed-on: https://chromium-review.googlesource.com/982273
Commit-Queue: David Valleau <valleau@chromium.org>
Reviewed-by: Drew Wilson <atwilson@chromium.org>
Reviewed-by: Sean Kau <skau@chromium.org>
Cr-Commit-Position: refs/heads/master@{#547243}