GitLab

Generate code for types inheriting from Enumeration and use this code in
the extractor and the validator. The extractor will accept any strings
that start with "http[s]://schema.org", while the validator will ensure
the strings match one of the enum options for one of the enum types in
the property config.

Previously these were treated as a nested entity type, but we will only
ever find enum as string values.

Bug: 1065511
Change-Id: I53b7d3cf290c94f44ede7776eb2cb287c21e513c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2128527
Commit-Queue: Sam Bowen <sgbowen@google.com>
Reviewed-by: Becca Hughes <beccahughes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#755189}