Wrap NV_path_rendering API with GrGLPathRendering

include/gpu/gl/GrGLInterface.h

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrGLInterface_DEFINED
 #define GrGLInterface_DEFINED
 
@@ skipping 317 matching lines @@
         GLPtr<GrGLPathStencilFuncProc> fPathStencilFunc;
         GLPtr<GrGLStencilFillPathProc> fStencilFillPath;
         GLPtr<GrGLStencilStrokePathProc> fStencilStrokePath;
         GLPtr<GrGLStencilFillPathInstancedProc> fStencilFillPathInstanced;
         GLPtr<GrGLStencilStrokePathInstancedProc> fStencilStrokePathInstanced;
         GLPtr<GrGLPathTexGenProc> fPathTexGen;
         GLPtr<GrGLCoverFillPathProc> fCoverFillPath;
         GLPtr<GrGLCoverStrokePathProc> fCoverStrokePath;
         GLPtr<GrGLCoverFillPathInstancedProc> fCoverFillPathInstanced;
         GLPtr<GrGLCoverStrokePathInstancedProc> fCoverStrokePathInstanced;
+        // NV_path_rendering v1.3

[Mark Kilgard, 2014/07/31 19:02:18]

again, glStencilThenCover* commands are v1.2

         GLPtr<GrGLStencilThenCoverFillPathProc> fStencilThenCoverFillPath;
         GLPtr<GrGLStencilThenCoverStrokePathProc> fStencilThenCoverStrokePath;
         GLPtr<GrGLStencilThenCoverFillPathInstancedProc> fStencilThenCoverFillPathInstanced;
         GLPtr<GrGLStencilThenCoverStrokePathInstancedProc> fStencilThenCoverStrokePathInstanced;

[Mark Kilgard, 2014/07/31 19:02:18]

glProgramPathFragmentInputGenNV is actually v1.3

         GLPtr<GrGLProgramPathFragmentInputGenProc> fProgramPathFragmentInputGen;
     } fFunctions;
 
     // Per-GL func callback
 #if GR_GL_PER_GL_FUNC_CALLBACK
     GrGLInterfaceCallbackProc fCallback;
     GrGLInterfaceCallbackData fCallbackData;
 #endif
 
     // This exists for internal testing.
     virtual void abandon() const {}
 };
 
 #endif