Clean up GrGLSLFragmentProcessor-derived classes

src/effects/SkLumaColorFilter.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkLumaColorFilter.h"
 
 #include "SkColorPriv.h"
@@ skipping 44 matching lines @@
 class LumaColorFilterEffect : public GrFragmentProcessor {
 public:
     static const GrFragmentProcessor* Create() {
         return new LumaColorFilterEffect;
     }
 
     const char* name() const override { return "Luminance-to-Alpha"; }
 
     class GLSLProcessor : public GrGLSLFragmentProcessor {
     public:
-        GLSLProcessor(const GrProcessor&) {}
-
         static void GenKey(const GrProcessor&, const GrGLSLCaps&, GrProcessorKeyBuilder* b) {}
 
-        virtual void emitCode(EmitArgs& args) override {
+        void emitCode(EmitArgs& args) override {
             if (nullptr == args.fInputColor) {
                 args.fInputColor = "vec4(1)";
             }
 
             GrGLSLFragmentBuilder* fragBuilder = args.fFragBuilder;
             fragBuilder->codeAppendf("\tfloat luma = dot(vec3(%f, %f, %f), %s.rgb);\n",
                                      SK_ITU_BT709_LUM_COEFF_R,
                                      SK_ITU_BT709_LUM_COEFF_G,
                                      SK_ITU_BT709_LUM_COEFF_B,
                                      args.fInputColor);
             fragBuilder->codeAppendf("\t%s = vec4(0, 0, 0, luma);\n",
                                      args.fOutputColor);
 
         }
 
     private:
         typedef GrGLSLFragmentProcessor INHERITED;
     };
 
 private:
     LumaColorFilterEffect() {
         this->initClassID<LumaColorFilterEffect>();
     }
 
     GrGLSLFragmentProcessor* onCreateGLSLInstance() const override {
-        return new GLSLProcessor(*this);
+        return new GLSLProcessor;
     }
 
     virtual void onGetGLSLProcessorKey(const GrGLSLCaps& caps,
                                        GrProcessorKeyBuilder* b) const override {
         GLSLProcessor::GenKey(*this, caps, b);
     }
 
     bool onIsEqual(const GrFragmentProcessor&) const override { return true; }
 
     void onComputeInvariantOutput(GrInvariantOutput* inout) const override {
         // The output is always black. The alpha value for the color passed in is arbitrary.
         inout->setToOther(kRGB_GrColorComponentFlags, GrColorPackRGBA(0, 0, 0, 0),
                           GrInvariantOutput::kWill_ReadInput);
     }
 };
 
 const GrFragmentProcessor* SkLumaColorFilter::asFragmentProcessor(GrContext*) const {
 
     return LumaColorFilterEffect::Create();
 }
 #endif