Bundle SkShader::asFragmentProcessor arguments in a struct

src/core/SkNormalSource.h

 /*
  * Copyright 2016 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkNormalSource_DEFINED
 #define SkNormalSource_DEFINED
 
 #include "SkFlattenable.h"
 
 /** Abstract class that generates or reads in normals for use by SkLightingShader.
 */
 class SK_API SkNormalSource : public SkFlattenable {
 public:
     virtual ~SkNormalSource() override;
 
 #if SK_SUPPORT_GPU
     /** Returns a fragment processor that takes no input and outputs a normal (already rotated)
         as its output color. To be used as a child fragment processor.
     */
-    virtual sk_sp<GrFragmentProcessor> asFragmentProcessor(
-            GrContext* context,
-            const SkMatrix& viewM,
-            const SkMatrix* localMatrix,
-            SkFilterQuality filterQuality,
-            SkSourceGammaTreatment gammaTreatment) const = 0;
+    virtual sk_sp<GrFragmentProcessor> asFragmentProcessor(const SkShader::AsFPArgs&) const = 0;
 #endif
 
     class Provider {
     public:
         virtual ~Provider() {};
 
         /** Called for each span of the object being drawn on the CPU. Your subclass should set
             the appropriate normals that correspond to the specified device coordinates.
         */
         virtual void fillScanLine(int x, int y, SkPoint3 output[], int count) const = 0;
@@ skipping 28 matching lines @@
 
     /** Returns a normal source that provides straight-up normals only (0, 0, 1).
     */
     static sk_sp<SkNormalSource> MakeFlat();
 
     SK_DEFINE_FLATTENABLE_TYPE(SkNormalSource)
     SK_DECLARE_FLATTENABLE_REGISTRAR_GROUP()
 };
 
 #endif