(Some) gradients are gamma and gamut correct on GPU

src/effects/gradients/SkTwoPointConicalGradient.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 "SkTwoPointConicalGradient.h"
 #include "SkTwoPointConicalGradient_gpu.h"
 
@@ skipping 342 matching lines @@
 }
 
 #if SK_SUPPORT_GPU
 
 #include "SkGr.h"
 
 sk_sp<GrFragmentProcessor> SkTwoPointConicalGradient::asFragmentProcessor(
         const AsFPArgs& args) const {
     SkASSERT(args.fContext);
     SkASSERT(fPtsToUnit.isIdentity());
+    sk_sp<GrColorSpaceXform> colorSpaceXform = GrColorSpaceXform::Make(fColorSpace.get(),
+                                                                       args.fDstColorSpace);
     sk_sp<GrFragmentProcessor> inner(Gr2PtConicalGradientEffect::Make(
-        GrGradientEffect::CreateArgs(args.fContext, this, args.fLocalMatrix, fTileMode)));
+        GrGradientEffect::CreateArgs(args.fContext, this, args.fLocalMatrix, fTileMode,
+                                     std::move(colorSpaceXform), SkToBool(args.fDstColorSpace))));
     return GrFragmentProcessor::MulOutputByInputAlpha(std::move(inner));
 }
 
 #endif
 
 #ifndef SK_IGNORE_TO_STRING
 void SkTwoPointConicalGradient::toString(SkString* str) const {
     str->append("SkTwoPointConicalGradient: (");
 
     str->append("center1: (");
@@ skipping 10 matching lines @@
     str->appendScalar(fCenter2.fY);
     str->append(") radius2: ");
     str->appendScalar(fRadius2);
     str->append(" ");
 
     this->INHERITED::toString(str);
 
     str->append(")");
 }
 #endif