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

src/gpu/effects/GrConfigConversionEffect.h

Index: src/gpu/effects/GrConfigConversionEffect.h
diff --git a/src/gpu/effects/GrConfigConversionEffect.h b/src/gpu/effects/GrConfigConversionEffect.h
index ba21c160c195e05934d7c35a4fd5e0959c27b5ca..fc92a0425791375303c7980da00d0a32f6689d30 100644
--- a/src/gpu/effects/GrConfigConversionEffect.h
+++ b/src/gpu/effects/GrConfigConversionEffect.h
@@ -38,8 +38,6 @@ public:
 
     const char* name() const override { return "Config Conversion"; }
 
-    GrGLFragmentProcessor* createGLInstance() const override;
-
     bool swapsRedAndBlue() const { return fSwapRedAndBlue; }
     PMConversion  pmConversion() const { return fPMConversion; }
 
@@ -59,6 +57,8 @@ private:
                              PMConversion pmConversion,
                              const SkMatrix& matrix);
 
+    GrGLFragmentProcessor* onCreateGLInstance() const override;
+
     void onGetGLProcessorKey(const GrGLSLCaps&, GrProcessorKeyBuilder*) const override;
 
     bool onIsEqual(const GrFragmentProcessor&) const override;