(Some) gradients are gamma and gamut correct on GPU

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 5691188db7d5522fbcff40b24b52030c2707fa1e..6eaecffedd2c8dd52d17bbba47a3f0c80f126697 100644
--- a/src/effects/gradients/SkRadialGradient.cpp
+++ b/src/effects/gradients/SkRadialGradient.cpp
@@ -355,8 +355,11 @@ sk_sp<GrFragmentProcessor> SkRadialGradient::asFragmentProcessor(const AsFPArgs&
         matrix.postConcat(inv);
     }
     matrix.postConcat(fPtsToUnit);
+    sk_sp<GrColorSpaceXform> colorSpaceXform = GrColorSpaceXform::Make(fColorSpace.get(),
+                                                                       args.fDstColorSpace);
     sk_sp<GrFragmentProcessor> inner(GrRadialGradient::Make(
-        GrGradientEffect::CreateArgs(args.fContext, this, &matrix, fTileMode)));
+        GrGradientEffect::CreateArgs(args.fContext, this, &matrix, fTileMode,
+                                     std::move(colorSpaceXform), SkToBool(args.fDstColorSpace))));
     return GrFragmentProcessor::MulOutputByInputAlpha(std::move(inner));
 }