Fixed-function NVPR codepaths were removed a while ago. Only NVPR API
version 1.3 (PathFragmentInputGen) was left working. Remove
backwards-compatibility code that was left behind.
Remove some NVPR API function typedefs that were left from initial
commits.
Remove PathCoords function pointer from GrGLInterface, it has
never been called and causes problems in the future, since it will
not be implemented in the Chromium pseudo extension.
Committed: https://skia.googlesource.com/skia/+/fb8d6884e0e01d0c2f8596adf5af1efb0d08de7e
Review URL: https://codereview.chromium.org/1177243004
e35b5d99d8