Enable native notifications on desktop Linux

BUG=676220,773790
R=peter@chromium.org
CC=thestig@chromium.org,owencm@chromium.org

Change-Id: Icc6334e093a72b936c14c963713173231567c63d
Reviewed-on: https://chromium-review.googlesource.com/740123
Reviewed-by: Peter Beverloo <peter@chromium.org>
Commit-Queue: Thomas Anderson <thomasanderson@chromium.org>
Cr-Commit-Position: refs/heads/master@{#512207}
1 file changed