GitLab

Get NotificationDisplayService lazily so that browser
tests can use NotificationDisplayServiceTester.

Bug: 1020582
Change-Id: Ifc85c2e63e6ca1c17eb29fdbfa91624802220ecd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1899847Reviewed-by: Richard Knoll <knollr@chromium.org>
Commit-Queue: Michael van Ouwerkerk <mvanouwerkerk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#712610}