Add clipShader with perspective GM

Bug: skia:10206
Change-Id: Iad24cb1134e8f501bce6434ea8511b21039abea2
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/293565
Commit-Queue: Mike Reed <reed@google.com>
Reviewed-by: Mike Reed <reed@google.com>
Auto-Submit: Michael Ludwig <michaelludwig@google.com>
1 file changed