Make GrGLSLProgramBuilder base class for ProgramBuilder

src/gpu/effects/GrCustomXfermode.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "effects/GrCustomXfermode.h"
 
 #include "GrCoordTransform.h"
@@ skipping 142 matching lines @@
         // Apply coverage by multiplying it into the src color before blending. Mixed samples will
         // "just work" automatically. (See onGetOptimizations())
         if (xp.readsCoverage()) {
             fsBuilder->codeAppendf("%s = %s * %s;",
                                    args.fOutputPrimary, args.fInputCoverage, args.fInputColor);
         } else {
             fsBuilder->codeAppendf("%s = %s;", args.fOutputPrimary, args.fInputColor);
         }
     }
 
-    void emitBlendCodeForDstRead(GrGLXPBuilder* pb, const char* srcColor, const char* dstColor,
+    void emitBlendCodeForDstRead(GrGLSLXPBuilder* pb, const char* srcColor, const char* dstColor,
                                  const char* outColor, const GrXferProcessor& proc) override {
         const CustomXP& xp = proc.cast<CustomXP>();
         SkASSERT(!xp.hasHWBlendEquation());
 
         GrGLXPFragmentBuilder* fsBuilder = pb->getFragmentShaderBuilder();
         GrGLSLBlend::AppendMode(fsBuilder, srcColor, dstColor, outColor, xp.mode());
     }
 
     void onSetData(const GrGLSLProgramDataManager&, const GrXferProcessor&) override {}
 
@@ skipping 219 matching lines @@
 
 ///////////////////////////////////////////////////////////////////////////////
 
 GrXPFactory* GrCustomXfermode::CreateXPFactory(SkXfermode::Mode mode) {
     if (!GrCustomXfermode::IsSupportedMode(mode)) {
         return nullptr;
     } else {
         return new CustomXPFactory(mode);
     }
 }