add API for Op creation
Introduce three calls on GrOp: Make, MakeWithExtraMemory,
and MakeWithProcessorSet. Instead of returning
unique_ptr<GrOp>, they return a type of GrOp::OpOwner.
GrOp::OpOwner safely deletes the op when it goes out
of scope for either new/delete or GrOpMemoryPool
allocations.
In order to make the code easier to refactor, I
eliminated MakeArg from the helpers.
Change-Id: Icfd697906f3147a8734575d08bd7195e7517383a
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/323778
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
Commit-Queue: Herb Derby <herb@google.com>
92 files changed