Use inheritance to define TextureGeometryProcesor vertex structs

Change-Id: Ibddc994e6b5599ab20a6f3d81dfe9c6644fb1f69
Reviewed-on: https://skia-review.googlesource.com/129183
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
1 file changed