GitLab

Also rename factory class.  This is in preparation for subsuming
some of this functionality into a higher level printers manager.

BUG=742487

Change-Id: I4929a4faa6bbdade248c9bdb710a3b53d8ebb262
Reviewed-on: https://chromium-review.googlesource.com/569849Reviewed-by: Gabriel Charette <gab@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
Reviewed-by: Sean Kau <skau@chromium.org>
Reviewed-by: Sky Malice <skym@chromium.org>
Reviewed-by: Steven Bennetts <stevenjb@chromium.org>
Reviewed-by: Anthony Vallee-Dubois <anthonyvd@chromium.org>
Commit-Queue: Justin Carlson <justincarlson@chromium.org>
Cr-Commit-Position: refs/heads/master@{#487292}