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

src/gpu/effects/GrConvexPolyEffect.h

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrConvexPolyEffect_DEFINED
 #define GrConvexPolyEffect_DEFINED
 
@@ skipping 51 matching lines @@
     virtual ~GrConvexPolyEffect();
 
     const char* name() const override { return "ConvexPoly"; }
 
     GrPrimitiveEdgeType getEdgeType() const { return fEdgeType; }
 
     int getEdgeCount() const { return fEdgeCount; }
 
     const SkScalar* getEdges() const { return fEdges; }
 
-    GrGLFragmentProcessor* createGLInstance() const override;
-
 private:
     GrConvexPolyEffect(GrPrimitiveEdgeType edgeType, int n, const SkScalar edges[]);
 
+    GrGLFragmentProcessor* onCreateGLInstance() const override;
+
     void onGetGLProcessorKey(const GrGLSLCaps&, GrProcessorKeyBuilder*) const override;
 
     bool onIsEqual(const GrFragmentProcessor& other) const override;
 
     void onComputeInvariantOutput(GrInvariantOutput* inout) const override;
 
     GrPrimitiveEdgeType    fEdgeType;
     int                    fEdgeCount;
     SkScalar               fEdges[3 * kMaxEdges];
 
     GR_DECLARE_FRAGMENT_PROCESSOR_TEST;
 
     typedef GrFragmentProcessor INHERITED;
 };
 
 
 #endif