Added tree structure to GrGLFragmentProcessor, i.e. GL instances

src/gpu/effects/GrDitherEffect.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrDitherEffect.h"
 #include "GrFragmentProcessor.h"
 #include "GrInvariantOutput.h"
 #include "SkRect.h"
 #include "gl/GrGLFragmentProcessor.h"
 #include "gl/builders/GrGLProgramBuilder.h"
 
 //////////////////////////////////////////////////////////////////////////////
 
 class DitherEffect : public GrFragmentProcessor {
 public:
     static GrFragmentProcessor* Create() {
         GR_CREATE_STATIC_PROCESSOR(gDitherEffect, DitherEffect, ())
         return SkRef(gDitherEffect);
     }
 
     virtual ~DitherEffect() {};
 
     const char* name() const override { return "Dither"; }
 
-    GrGLFragmentProcessor* createGLInstance() const override;
-
 private:
     DitherEffect() {
         this->initClassID<DitherEffect>();
         this->setWillReadFragmentPosition();
     }
 
+    GrGLFragmentProcessor* onCreateGLInstance() const override;
+
     void onGetGLProcessorKey(const GrGLSLCaps&, GrProcessorKeyBuilder*) const override;
 
     // All dither effects are equal
     bool onIsEqual(const GrFragmentProcessor&) const override { return true; }
 
     void onComputeInvariantOutput(GrInvariantOutput* inout) const override;
 
     GR_DECLARE_FRAGMENT_PROCESSOR_TEST;
 
     typedef GrFragmentProcessor INHERITED;
@@ skipping 44 matching lines @@
                            args.fOutputColor, GrGLSLExpr4(args.fInputColor).c_str());
 }
 
 //////////////////////////////////////////////////////////////////////////////
 
 void DitherEffect::onGetGLProcessorKey(const GrGLSLCaps& caps,
                                      GrProcessorKeyBuilder* b) const {
     GLDitherEffect::GenKey(*this, caps, b);
 }
 
-GrGLFragmentProcessor* DitherEffect::createGLInstance() const  {
+GrGLFragmentProcessor* DitherEffect::onCreateGLInstance() const  {
     return SkNEW_ARGS(GLDitherEffect, (*this));
 }
 
 GrFragmentProcessor* GrDitherEffect::Create() { return DitherEffect::Create(); }