Fifth small fragment from "Reduce dependence on GrSurface's origin field"

TBR=bsalomon@google.com
Change-Id: Id59fa3d2cd657e84f1b4db32847bc07e850271f4
Reviewed-on: https://skia-review.googlesource.com/26362
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
1 file changed