GitLab

Also dropped prefix from enum values names as they are not necesary
with enum class.

Change-Id: Iff808da768321a91a8b841db3aa133935ccab477
Reviewed-on: https://chromium-review.googlesource.com/1104789
Commit-Queue: Sergey Ulanov <sergeyu@chromium.org>
Reviewed-by: Scott Violet <sky@chromium.org>
Cr-Commit-Position: refs/heads/master@{#568527}