Delete SkColorSpace::kUnknown_Named, remove fNamed field

include/core/SkColorSpace.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 SkColorSpace_DEFINED
 #define SkColorSpace_DEFINED
 
 #include "SkMatrix44.h"
 #include "SkRefCnt.h"
 
 class SkData;
 
 class SK_API SkColorSpace : public SkRefCnt {
 public:
 
     /**
      *  Common, named profiles that we can recognize.
      */
-    enum Named {
-        kUnknown_Named,
+    enum Named : uint8_t {
+        /**
+         *  By far the most common color space.
+         *  This is the default space for images, unmarked content, and monitors.
+         */
         kSRGB_Named,
+
+        /**
+         *  Very common wide gamut color space.
+         *  Often used by images and monitors.
+         */
         kAdobeRGB_Named,
     };
 
-    enum GammaNamed {
+    enum GammaNamed : uint8_t {
         kLinear_GammaNamed,
 
         /**
          *  Gamma curve is a close match to the canonical sRGB curve, which has
          *  a short linear segment followed by a 2.4f exponential.
          */
         kSRGB_GammaNamed,
 
         /**
          *  Gamma curve is a close match to the 2.2f exponential curve.  This is
@@ skipping 70 matching lines @@
 
     static sk_sp<SkColorSpace> Deserialize(const void* data, size_t length);
 
     /**
      *  If both are null, we return true.  If one is null and the other is not, we return false.
      *  If both are non-null, we do a deeper compare.
      */
     static bool Equals(const SkColorSpace* src, const SkColorSpace* dst);
 
 protected:
-    SkColorSpace(GammaNamed gammaNamed, const SkMatrix44& toXYZD50, Named named);
+    SkColorSpace(GammaNamed gammaNamed, const SkMatrix44& toXYZD50);
 
     const GammaNamed fGammaNamed;
     const SkMatrix44 fToXYZD50;
-    const Named      fNamed;
 };
 
 #endif