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

src/gpu/effects/GrTextureDomain.h

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrTextureDomainEffect_DEFINED
 #define GrTextureDomainEffect_DEFINED
 
@@ skipping 151 matching lines @@
                                        const SkMatrix&,
                                        const SkRect& domain,
                                        GrTextureDomain::Mode,
                                        GrTextureParams::FilterMode filterMode,
                                        GrCoordSet = kLocal_GrCoordSet);
 
     virtual ~GrTextureDomainEffect();
 
     const char* name() const override { return "TextureDomain"; }
 
-    GrGLFragmentProcessor* createGLInstance() const override;
-
     const GrTextureDomain& textureDomain() const { return fTextureDomain; }
 
 protected:
     GrTextureDomain fTextureDomain;
 
 private:
     GrTextureDomainEffect(GrProcessorDataManager*,
                           GrTexture*,
                           const SkMatrix&,
                           const SkRect& domain,
                           GrTextureDomain::Mode,
                           GrTextureParams::FilterMode,
                           GrCoordSet);
 
+    GrGLFragmentProcessor* onCreateGLInstance() const override;
+
     void onGetGLProcessorKey(const GrGLSLCaps&, GrProcessorKeyBuilder*) const override;
 
     bool onIsEqual(const GrFragmentProcessor&) const override;
 
     void onComputeInvariantOutput(GrInvariantOutput* inout) const override;
 
     GR_DECLARE_FRAGMENT_PROCESSOR_TEST;
 
     typedef GrSingleTextureEffect INHERITED;
 };
 
 #endif