GitLab

This CL migrates ArcNotificationManager.

BUG=672829
TEST=Ran try. Ran on DUT.

Change-Id: I4b7283246b9d808fe61a97e20061a4b87c8c0321
Reviewed-on: https://chromium-review.googlesource.com/574890Reviewed-by: Paweł Hajdan Jr. <phajdan.jr@chromium.org>
Reviewed-by: Yoshiki Iguchi <yoshiki@chromium.org>
Reviewed-by: Luis Hector Chavez <lhchavez@chromium.org>
Commit-Queue: Hidehiko Abe <hidehiko@chromium.org>
Cr-Commit-Position: refs/heads/master@{#487526}