Smaller fragment from "Reduce dependence on GrSurface's origin field"

TBR=bsalomon@google.com
Change-Id: I996226ffaf84ca357740a6da9bb80a3b8febb379
Reviewed-on: https://skia-review.googlesource.com/25745
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
12 files changed