Revert of Cleanup legacy NVPR-related definitions

src/gpu/gl/GrGLGpu.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 GrGLGpu_DEFINED
 #define GrGLGpu_DEFINED
 
@@ skipping 36 matching lines @@
     GrGLSLGeneration glslGeneration() const { return fGLContext->glslGeneration(); }
     const GrGLCaps& glCaps() const { return *fGLContext->caps(); }
 
     GrGLPathRendering* glPathRendering() {
         SkASSERT(glCaps().shaderCaps()->pathRenderingSupport());
         return static_cast<GrGLPathRendering*>(pathRendering());
     }
 
     void discard(GrRenderTarget*) override;
 
-    // Used by GrGLProgram to configure OpenGL state.
+    // Used by GrGLProgram and GrGLPathTexGenProgramEffects to configure OpenGL
+    // state.
     void bindTexture(int unitIdx, const GrTextureParams& params, GrGLTexture* texture);
 
     // GrGpu overrides
     GrPixelConfig preferredReadPixelsConfig(GrPixelConfig readConfig,
                                             GrPixelConfig surfaceConfig) const override;
     GrPixelConfig preferredWritePixelsConfig(GrPixelConfig writeConfig,
                                              GrPixelConfig surfaceConfig) const override;
     bool canWriteTexturePixels(const GrTexture*, GrPixelConfig srcConfig) const override;
     bool readPixelsWillPayForYFlip(GrRenderTarget* renderTarget,
                                    int left, int top,
@@ skipping 427 matching lines @@
 
     // we record what stencil format worked last time to hopefully exit early
     // from our loop that tries stencil formats and calls check fb status.
     int fLastSuccessfulStencilFmtIdx;
 
     typedef GrGpu INHERITED;
     friend class GrGLPathRendering; // For accessing setTextureUnit.
 };
 
 #endif