Initial CL to create dummy GrShaderDataManager and thread it through

src/effects/gradients/SkSweepGradient.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 SkSweepGradient_DEFINED
 #define SkSweepGradient_DEFINED
@@ skipping 15 matching lines @@
 
     private:
         typedef SkGradientShaderBase::GradientShaderBaseContext INHERITED;
     };
 
     BitmapType asABitmap(SkBitmap* bitmap, SkMatrix* matrix, TileMode* xy) const override;
 
     GradientType asAGradient(GradientInfo* info) const override;
 
     bool asFragmentProcessor(GrContext*, const SkPaint&, const SkMatrix& viewM,
-                             const SkMatrix*, GrColor*,
+                             const SkMatrix*, GrColor*, GrShaderDataManager*,
                              GrFragmentProcessor**) const override;
 
     SK_TO_STRING_OVERRIDE()
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkSweepGradient)
 
 protected:
     void flatten(SkWriteBuffer& buffer) const override;
     Context* onCreateContext(const ContextRec&, void* storage) const override;
 
 private:
     const SkPoint fCenter;
 
     friend class SkGradientShader;
     typedef SkGradientShaderBase INHERITED;
 };
 
 #endif