SKC group improvements

NOTREECHECKS=true
NOTRY=true
NOPRESUBMIT=true
Bug: skia:
Change-Id: Ia1a3762b8b7537f4e672896aea7b4988410a71ef
Reviewed-on: https://skia-review.googlesource.com/158320
Reviewed-by: Allan MacKinnon <allanmac@google.com>
Commit-Queue: Allan MacKinnon <allanmac@google.com>
Auto-Submit: Allan MacKinnon <allanmac@google.com>
7 files changed