Start disentangling tessellation from pipeline creation in GrTextureOp

The idea/dream here is to be able to (optionally) tessellate in onPrePrepareDraws and then just copy the prePrepared data into the vertex buffer.

Change -Id: I899eebce36dc9516bfc4b0fce5e657458167c772

Change-Id: I899eebce36dc9516bfc4b0fce5e657458167c772
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/248804
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
9 files changed