Add more specialized fragment builders

src/gpu/effects/GrConstColorProcessor.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/GrConstColorProcessor.h"
 #include "GrInvariantOutput.h"
 #include "glsl/GrGLSLFragmentProcessor.h"
 #include "glsl/GrGLSLFragmentShaderBuilder.h"
 #include "glsl/GrGLSLProgramDataManager.h"
 #include "glsl/GrGLSLUniformHandler.h"
 
 class GLConstColorProcessor : public GrGLSLFragmentProcessor {
 public:
     GLConstColorProcessor() : fPrevColor(GrColor_ILLEGAL) {}
 
     void emitCode(EmitArgs& args) override {
-        GrGLSLFragmentBuilder* fragBuilder = args.fFragBuilder;
+        GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder;
         const char* colorUni;
         fColorUniform = args.fUniformHandler->addUniform(kFragment_GrShaderFlag,
                                                          kVec4f_GrSLType, kMedium_GrSLPrecision,
                                                          "constantColor",
                                                          &colorUni);
         GrConstColorProcessor::InputMode mode = args.fFp.cast<GrConstColorProcessor>().inputMode();
         if (!args.fInputColor) {
             mode = GrConstColorProcessor::kIgnore_InputMode;
         }
         switch (mode) {
@@ skipping 97 matching lines @@
             color = 0;
             break;
         case 2:
             color = d->fRandom->nextULessThan(0x100);
             color = color | (color << 8) | (color << 16) | (color << 24);
             break;
     }
     InputMode mode = static_cast<InputMode>(d->fRandom->nextULessThan(kInputModeCnt));
     return GrConstColorProcessor::Create(color, mode);
 }