GitLab

This CL changes sub header separator color of detailed views in
UnifiedSystemTray.

Screenshot: http://screen/t36mz755DuP

TEST=manual
BUG=854146

Change-Id: I77b37bc6e352f427453c5da635c9d6d9dd649f0f
Reviewed-on: https://chromium-review.googlesource.com/1107428Reviewed-by: Yoshiki Iguchi <yoshiki@chromium.org>
Commit-Queue: Tetsui Ohkubo <tetsui@chromium.org>
Cr-Commit-Position: refs/heads/master@{#568753}