Add destination color space to AsFPArgs. Eliminates last XFORMTODO.

src/effects/gradients/SkRadialGradient.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkRadialGradient.h"
 #include "SkNx.h"
 
@@ skipping 296 matching lines @@
     SkScalar radius = d->fRandom->nextUScalar1();
 
     SkColor colors[kMaxRandomGradientColors];
     SkScalar stopsArray[kMaxRandomGradientColors];
     SkScalar* stops = stopsArray;
     SkShader::TileMode tm;
     int colorCount = RandomGradientParams(d->fRandom, colors, &stops, &tm);
     auto shader = SkGradientShader::MakeRadial(center, radius, colors, stops, colorCount, tm);
     SkMatrix viewMatrix = GrTest::TestMatrix(d->fRandom);
     sk_sp<GrFragmentProcessor> fp = shader->asFragmentProcessor(SkShader::AsFPArgs(
-        d->fContext, &viewMatrix, NULL, kNone_SkFilterQuality, SkSourceGammaTreatment::kRespect));
+        d->fContext, &viewMatrix, NULL, kNone_SkFilterQuality, nullptr,
+        SkSourceGammaTreatment::kRespect));
     GrAlwaysAssert(fp);
     return fp;
 }
 
 /////////////////////////////////////////////////////////////////////
 
 void GrGLRadialGradient::emitCode(EmitArgs& args) {
     const GrRadialGradient& ge = args.fFp.cast<GrRadialGradient>();
     this->emitUniforms(args.fUniformHandler, ge);
     SkString t("length(");
@@ skipping 42 matching lines @@
     str->appendScalar(fCenter.fY);
     str->append(") radius: ");
     str->appendScalar(fRadius);
     str->append(" ");
 
     this->INHERITED::toString(str);
 
     str->append(")");
 }
 #endif