Demo different sampling options

Requested by blink team

Change-Id: I5b93c330341e8582bfc479bd830bb6dfa3489847
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/396198
Commit-Queue: Mike Reed <reed@google.com>
Reviewed-by: Kevin Lubick <kjlubick@google.com>
1 file changed