Bundle SkShader::asFragmentProcessor arguments in a struct

src/effects/gradients/SkRadialGradient.cpp

Index: src/effects/gradients/SkRadialGradient.cpp
diff --git a/src/effects/gradients/SkRadialGradient.cpp b/src/effects/gradients/SkRadialGradient.cpp
index c7e665654992cec0642634143b930877b2dbc8ba..bcedb7f2e8862faa4a2a17bfa0d9bec4339e3d8e 100644
--- a/src/effects/gradients/SkRadialGradient.cpp
+++ b/src/effects/gradients/SkRadialGradient.cpp
@@ -312,9 +312,9 @@ sk_sp<GrFragmentProcessor> GrRadialGradient::TestCreate(GrProcessorTestData* d)
     SkShader::TileMode tm;
     int colorCount = RandomGradientParams(d->fRandom, colors, &stops, &tm);
     auto shader = SkGradientShader::MakeRadial(center, radius, colors, stops, colorCount, tm);
-    sk_sp<GrFragmentProcessor> fp = shader->asFragmentProcessor(d->fContext,
-        GrTest::TestMatrix(d->fRandom), NULL, kNone_SkFilterQuality,
-        SkSourceGammaTreatment::kRespect);
+    SkMatrix viewMatrix = GrTest::TestMatrix(d->fRandom);
+    sk_sp<GrFragmentProcessor> fp = shader->asFragmentProcessor(SkShader::AsFPArgs(
+        d->fContext, &viewMatrix, NULL, kNone_SkFilterQuality, SkSourceGammaTreatment::kRespect));
     GrAlwaysAssert(fp);
     return fp;
 }
@@ -338,27 +338,23 @@ void GrGLRadialGradient::emitCode(EmitArgs& args) {
 
 /////////////////////////////////////////////////////////////////////
 
-sk_sp<GrFragmentProcessor> SkRadialGradient::asFragmentProcessor(
-                                                 GrContext* context,
-                                                 const SkMatrix& viewM,
-                                                 const SkMatrix* localMatrix,
-                                                 SkFilterQuality,
-                                                 SkSourceGammaTreatment) const {
-    SkASSERT(context);
+sk_sp<GrFragmentProcessor> SkRadialGradient::asFragmentProcessor(const AsFPArgs& args) const {
+    SkASSERT(args.fContext);
 
     SkMatrix matrix;
     if (!this->getLocalMatrix().invert(&matrix)) {
         return nullptr;
     }
-    if (localMatrix) {
+    if (args.fLocalMatrix) {
         SkMatrix inv;
-        if (!localMatrix->invert(&inv)) {
+        if (!args.fLocalMatrix->invert(&inv)) {
             return nullptr;
         }
         matrix.postConcat(inv);
     }
     matrix.postConcat(fPtsToUnit);
-    sk_sp<GrFragmentProcessor> inner(GrRadialGradient::Make(context, *this, matrix, fTileMode));
+    sk_sp<GrFragmentProcessor> inner(
+        GrRadialGradient::Make(args.fContext, *this, matrix, fTileMode));
     return GrFragmentProcessor::MulOutputByInputAlpha(std::move(inner));
 }