Revert of Cleanup legacy NVPR-related definitions

Revert of Cleanup legacy NVPR-related definitions (patchset #3 id:40001 of https://codereview.chromium.org/1177243004/)

Reason for revert:
Broke the GPU SAN bots: https://build.chromium.org/p/client.skia/builders/Test-Ubuntu-GCC-Golo-GPU-GT610-x86_64-Debug-ASAN/builds/779/steps/dm/logs/stdio

Original issue's description:
> Cleanup legacy NVPR-related definitions
> 
> 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

TBR=joshualitt@google.com,cdalton@nvidia.com,bsalomon@google.com,kkinnunen@nvidia.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Committed: https://skia.googlesource.com/skia/+/538bacb4bb3ceac7786108cd68b04ed58b1c29c7

[f(malita), 2015-06-25 15:42:05]

Created Revert of Cleanup legacy NVPR-related definitions

[commit-bot: I haz the power, 2015-06-25 15:42:18]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1206333003/1

[commit-bot: I haz the power, 2015-06-25 15:42:28]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/538bacb4bb3ceac7786108cd68b04ed58b1c29c7