Rename files, macros, types, and functions related to GrDrawOp testing.

Make the test factories use sk_sp.

Change-Id: Idba630b84deb2848f2203a80fd72e1efa5fc6acf
Reviewed-on: https://skia-review.googlesource.com/6342
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
27 files changed