Delete SkColorSpace::gammaNamed() from public API

src/core/SkColorSpaceXform.h

 /*
  * Copyright 2016 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkColorSpaceXform_DEFINED
 #define SkColorSpaceXform_DEFINED
 
@@ skipping 24 matching lines @@
 
     virtual ~SkColorSpaceXform() {}
 };
 
 enum ColorSpaceMatch {
     kNone_ColorSpaceMatch,
     kGamut_ColorSpaceMatch,
     kFull_ColorSpaceMatch,
 };
 
-template <SkColorSpace::GammaNamed kDst, ColorSpaceMatch kCSM>
+template <SkGammaNamed kDst, ColorSpaceMatch kCSM>
 class SkColorSpaceXform_Base : public SkColorSpaceXform {
 public:
 
     void apply(void* dst, const uint32_t* src, int len, SkColorType dstColorType,
                SkAlphaType dstAlphaType) const override;
 
     static constexpr int      kDstGammaTableSize = 1024;
 
 private:
     SkColorSpaceXform_Base(const sk_sp<SkColorSpace>& srcSpace, const SkMatrix44& srcToDst,
@@ skipping 12 matching lines @@
     uint8_t                   fDstGammaTableStorage[3 * kDstGammaTableSize];
 
     friend class SkColorSpaceXform;
     friend std::unique_ptr<SkColorSpaceXform> SlowIdentityXform(const sk_sp<SkColorSpace>& space);
 };
 
 // For testing.  Bypasses opts for when src and dst color spaces are equal.
 std::unique_ptr<SkColorSpaceXform> SlowIdentityXform(const sk_sp<SkColorSpace>& space);
 
 #endif