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

TBR=bsalomon@google.com
Change-Id: I585ab16767c2276974763213916f25755c1a8a45
Reviewed-on: https://skia-review.googlesource.com/25743
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
1 file changed