GitLab

Turn on using pdf compositor service for printing by default. Still keep
the feature flag as a kill switch for now.

BUG=824867

Change-Id: I5b7751c5ce453a7ffcda1bf38b5f141135f850f6
Reviewed-on: https://chromium-review.googlesource.com/1087872Reviewed-by: Lei Zhang <thestig@chromium.org>
Reviewed-by: Charlie Reis <creis@chromium.org>
Commit-Queue: Wei Li <weili@chromium.org>
Cr-Commit-Position: refs/heads/master@{#565018}