Clean up GrGLSLFragmentProcessor-derived classes

src/utils/debugger/SkOverdrawMode.cpp

 /*
  * Copyright 2016 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkColorPriv.h"
 #include "SkOverdrawMode.h"
 #include "SkString.h"
@@ skipping 87 matching lines @@
     fragBuilder->codeAppend("if (dst.r < 0.25) { nextIdx = 1; }");
     // cap 'idx' at 10
     fragBuilder->codeAppend("else if (dst.g < 0.0977) { nextIdx = 10; }");
     fragBuilder->codeAppend("else if (dst.b > 0.08) { nextIdx = 8 - int(6.0 * dst.b + 0.5); }");
     fragBuilder->codeAppend("else { nextIdx = 11 - int(5.7 * dst.g + 0.5); }");
     fragBuilder->codeAppendf("%s = %s(float(nextIdx));", outputColor, colorTableFuncName.c_str());
 }
 
 class GLOverdrawFP : public GrGLSLFragmentProcessor {
 public:
-    GLOverdrawFP(const GrOverdrawFP&) {}
-
-    ~GLOverdrawFP() override {}
-
     void emitCode(EmitArgs& args) override {
         GrGLSLFragmentBuilder* fragBuilder = args.fFragBuilder;
         SkString dstColor("dstColor");
         this->emitChild(0, nullptr, &dstColor, args);
 
         add_overdraw_code(fragBuilder, dstColor.c_str(), args.fOutputColor);
     }
 
     static void GenKey(const GrProcessor&, const GrGLSLCaps&, GrProcessorKeyBuilder*) { }
 
 private:
     typedef GrGLSLFragmentProcessor INHERITED;
 };
 
 ///////////////////////////////////////////////////////////////////////////////
 
 GrGLSLFragmentProcessor* GrOverdrawFP::onCreateGLSLInstance() const {
-    return new GLOverdrawFP(*this);
+    return new GLOverdrawFP;
 }
 
 void GrOverdrawFP::onGetGLSLProcessorKey(const GrGLSLCaps& caps, GrProcessorKeyBuilder* b) const {
     GLOverdrawFP::GenKey(*this, caps, b);
 }
 
 const GrFragmentProcessor* GrOverdrawFP::TestCreate(GrProcessorTestData* d) {
     SkAutoTUnref<const GrFragmentProcessor> dst(GrProcessorUnitTest::CreateChildFP(d));
     return new GrOverdrawFP(dst);
 }
@@ skipping 185 matching lines @@
 
 SkFlattenable* SkOverdrawXfermode::CreateProc(SkReadBuffer& buffer) {
     return Create();
 }
 
 SkXfermode* SkOverdrawMode::Create() { return new SkOverdrawXfermode; }
 
 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_START(SkOverdrawMode)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkOverdrawXfermode)
 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_END