Pull non-substantive changes out of GrShape mask drawing CL

This is pulled out of:
https://skia-review.googlesource.com/c/skia/+/146767 (Add GPU-side caching of mask-filtered path masks)

Change-Id: I2a80c8c664bb120b048cff47c431a8d595ae2c81
Reviewed-on: https://skia-review.googlesource.com/147809
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
15 files changed