GitLab

Remove the ServiceWorkerForegroundPriority feature since it has been
successfully launched to 100% in Chrome 74.

Bug: 928904
Change-Id: I64059e14b9eed99763db842fef248b5813b082de
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1633049Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
Commit-Queue: Ben Kelly <wanderview@chromium.org>
Cr-Commit-Position: refs/heads/master@{#664017}