[graphite] Refactor PrecompileBase and PaintOptions a bit

This CL mainly renames some members of PaintOptions and splits up its computation of the number of combinations.

For PrecompileBase it simply makes some private methods public (The Priv class will still be needed in future CLs).

Bug: b/259547892
Change-Id: I668523524da52b46a9964cbde5efd631ff1f7959
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/611679
Commit-Queue: Robert Phillips <robertphillips@google.com>
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
4 files changed