Add destination color space to AsFPArgs. Eliminates last XFORMTODO.

src/core/SkBitmapProcShader.cpp

Index: src/core/SkBitmapProcShader.cpp
diff --git a/src/core/SkBitmapProcShader.cpp b/src/core/SkBitmapProcShader.cpp
index 406cc6f000758099e116f1175297fb60c97cd9c1..006fedf626d64245e08a979afaa691b8a0b1e7ce 100644
--- a/src/core/SkBitmapProcShader.cpp
+++ b/src/core/SkBitmapProcShader.cpp
@@ -457,9 +457,8 @@ sk_sp<GrFragmentProcessor> SkBitmapProcShader::asFragmentProcessor(const AsFPArg
                                     "Couldn't convert bitmap to texture.");
         return nullptr;
     }
-    SkColorSpace* dstColorSpace = nullptr; // XFORMTODO
     sk_sp<GrColorSpaceXform> colorSpaceXform = GrColorSpaceXform::Make(fRawBitmap.colorSpace(),
-                                                                       dstColorSpace);
+                                                                       args.fDstColorSpace);
     sk_sp<GrFragmentProcessor> inner;
     if (doBicubic) {
         inner = GrBicubicEffect::Make(texture, std::move(colorSpaceXform), matrix, tm);