Delete SkColorSpace::gammaNamed() from public API

tests/ColorSpaceXformTest.cpp

Index: tests/ColorSpaceXformTest.cpp
diff --git a/tests/ColorSpaceXformTest.cpp b/tests/ColorSpaceXformTest.cpp
index 415063d46238797c925e32d6952eacda73f8e24b..3cac160e6c265403510d43a98166531b9546b9f1 100644
--- a/tests/ColorSpaceXformTest.cpp
+++ b/tests/ColorSpaceXformTest.cpp
@@ -18,7 +18,7 @@ public:
     static std::unique_ptr<SkColorSpaceXform> CreateIdentityXform(const sk_sp<SkGammas>& gammas) {
         // Logically we can pass any matrix here.  For simplicty, pass I(), i.e. D50 XYZ gamut.
         sk_sp<SkColorSpace> space(new SkColorSpace_Base(
-                nullptr, SkColorSpace::kNonStandard_GammaNamed, gammas, SkMatrix::I(), nullptr));
+                nullptr, kNonStandard_SkGammaNamed, gammas, SkMatrix::I(), nullptr));
 
         // Use special testing entry point, so we don't skip the xform, even though src == dst.
         return SlowIdentityXform(space);