Enable flattening and unflattening of SkColorSpace

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,
         kSRGB_Named,
         kAdobeRGB_Named,
@@ skipping 44 matching lines @@
      */
     const SkMatrix44& xyz() const { return fToXYZD50; }
 
     /**
      *  Returns true if the color space gamma is near enough to be approximated as sRGB.
      */
     bool gammaCloseToSRGB() const {
         return kSRGB_GammaNamed == fGammaNamed || k2Dot2Curve_GammaNamed == fGammaNamed;
     }
 
+    /**
+     *  Returns nullptr on failure.  Fails when we fallback to serializing ICC data and
+     *  the data is too large to serialize.
+     */
+    sk_sp<SkData> serialize() const;
+
+    static sk_sp<SkColorSpace> Deserialize(const void* data, size_t length);
+
 protected:
     SkColorSpace(GammaNamed gammaNamed, const SkMatrix44& toXYZD50, Named named);
 
-    friend Named sk_deduce_named_from_colorspace(SkColorSpace*);
-
     const GammaNamed fGammaNamed;
     const SkMatrix44 fToXYZD50;
     const Named      fNamed;
 };
 
 #endif