Make BoundingBoxShader inherit from GrGeometryProcessor directly

This is not a tessellation shader, and only inherited from
GrPathTessellationShader because it was used by the tessellation path
renderer. Remove its dependence on GrPathTessellationShader.

Bug: skia:10419
Change-Id: Ia97ef68488fae1c90674c5a006a62a3157bb707f
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/430019
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Chris Dalton <csmartdalton@google.com>
1 file changed