GitLab

Add automated test to verify that there are 2 buttons in the print
header and they are in the correct order for all platforms. Split off
parent CL, which contains a fix for the bug linked.

Bug: 880562
Change-Id: I3472561dd1af7e75a86bf4821fb4ae42e82a0d5f
Reviewed-on: https://chromium-review.googlesource.com/1205717Reviewed-by: Scott Chen <scottchen@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Rebekah Potter <rbpotter@chromium.org>
Cr-Commit-Position: refs/heads/master@{#588746}