This relands the idea that onMatchFaceStyle is no longer used, but
leaves the baseclass virtual to stage removing it from client
subclasses.
This reverts commit 3c04a65508.
Change-Id: I18570065249c86f7f155c28288dce3ea9d59f619
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/401759
Reviewed-by: Ben Wagner <bungeman@google.com>
Commit-Queue: Mike Reed <reed@google.com>