GitLab

Added ability for metadata to return a finite list of valid values for a given member, such as enums and bool.

Bug: 938501
Change-Id: I1ca2d37b08122df832adff0c153c038a291f260d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2065428
Commit-Queue: Allen Bauer <kylixrd@chromium.org>
Reviewed-by: Wei Li <weili@chromium.org>
Auto-Submit: Allen Bauer <kylixrd@chromium.org>
Cr-Commit-Position: refs/heads/master@{#842562}