Try out new refFoo pattern on GrStyle

Change-Id: Ic7f30e3730a3431adf365d729320fe50f38dcea8
Reviewed-on: https://skia-review.googlesource.com/6907
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
6 files changed