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

src/gpu/effects/GrSimpleTextureEffect.h

Index: src/gpu/effects/GrSimpleTextureEffect.h
diff --git a/src/gpu/effects/GrSimpleTextureEffect.h b/src/gpu/effects/GrSimpleTextureEffect.h
index c86b1365e7771e326cab8fc08e7c46200f0633a3..ab10ecf82444ba247d28ef265ca5b826462926f2 100644
--- a/src/gpu/effects/GrSimpleTextureEffect.h
+++ b/src/gpu/effects/GrSimpleTextureEffect.h
@@ -53,8 +53,6 @@ public:
 
     const char* name() const override { return "SimpleTexture"; }
 
-    GrGLFragmentProcessor* createGLInstance() const override;
-
 private:
     GrSimpleTextureEffect(GrProcessorDataManager* procDataManager,
                           GrTexture* texture,
@@ -74,6 +72,8 @@ private:
         this->initClassID<GrSimpleTextureEffect>();
     }
 
+    GrGLFragmentProcessor* onCreateGLInstance() const override;
+
     void onGetGLProcessorKey(const GrGLSLCaps&, GrProcessorKeyBuilder*) const override;
 
     bool onIsEqual(const GrFragmentProcessor& other) const override { return true; }