Clean up GrGLSLFragmentProcessor-derived classes

src/effects/SkDisplacementMapEffect.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 "SkDisplacementMapEffect.h"
 #include "SkDevice.h"
 #include "SkReadBuffer.h"
@@ skipping 295 matching lines @@
     str->appendf("))");
 }
 #endif
 
 ///////////////////////////////////////////////////////////////////////////////
 
 #if SK_SUPPORT_GPU
 class GrGLDisplacementMapEffect : public GrGLSLFragmentProcessor {
 public:
     GrGLDisplacementMapEffect(const GrProcessor&);
-    virtual ~GrGLDisplacementMapEffect();
 
-    virtual void emitCode(EmitArgs&) override;
+    void emitCode(EmitArgs&) override;
 
     static inline void GenKey(const GrProcessor&, const GrGLSLCaps&, GrProcessorKeyBuilder*);
 
     const GrTextureDomain::GLDomain& glDomain() const { return fGLDomain; }
 
 protected:
     void onSetData(const GrGLSLProgramDataManager&, const GrProcessor&) override;
 
 private:
     SkDisplacementMapEffect::ChannelSelectorType fXChannelSelector;
@@ skipping 212 matching lines @@
                                            d->fTextures[texIdxColor], colorDimensions);
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
 GrGLDisplacementMapEffect::GrGLDisplacementMapEffect(const GrProcessor& proc)
     : fXChannelSelector(proc.cast<GrDisplacementMapEffect>().xChannelSelector())
     , fYChannelSelector(proc.cast<GrDisplacementMapEffect>().yChannelSelector()) {
 }
 
-GrGLDisplacementMapEffect::~GrGLDisplacementMapEffect() {
-}
-
 void GrGLDisplacementMapEffect::emitCode(EmitArgs& args) {
     const GrTextureDomain& domain = args.fFp.cast<GrDisplacementMapEffect>().domain();
 
     fScaleUni = args.fUniformHandler->addUniform(GrGLSLUniformHandler::kFragment_Visibility,
                                                  kVec2f_GrSLType, kDefault_GrSLPrecision, "Scale");
     const char* scaleUni = args.fUniformHandler->getUniformCStr(fScaleUni);
     const char* dColor = "dColor";
     const char* cCoords = "cCoords";
     const char* nearZero = "1e-6"; // Since 6.10352e−5 is the smallest half float, use
                                    // a number smaller than that to approximate 0, but
@@ skipping 76 matching lines @@
                                        const GrGLSLCaps&, GrProcessorKeyBuilder* b) {
     const GrDisplacementMapEffect& displacementMap = proc.cast<GrDisplacementMapEffect>();
 
     uint32_t xKey = displacementMap.xChannelSelector();
     uint32_t yKey = displacementMap.yChannelSelector() << kChannelSelectorKeyBits;
 
     b->add32(xKey | yKey);
 }
 #endif