Fix Equals and serialization for rare pngs

src/core/SkColorSpace_Base.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_Base_DEFINED
 #define SkColorSpace_Base_DEFINED
 
@@ skipping 156 matching lines @@
     // Objects of this type are created in a custom fashion using sk_malloc_throw
     // and therefore must be sk_freed.
     void* operator new(size_t size) = delete;
     void* operator new(size_t, void* p) { return p; }
     void operator delete(void* p) { sk_free(p); }
 };
 
 class SkColorSpace_Base : public SkColorSpace {
 public:
 
-    static sk_sp<SkColorSpace> NewRGB(float gammas[3], const SkMatrix44& toXYZD50);
+    static sk_sp<SkColorSpace> NewRGB(const float gammas[3], const SkMatrix44& toXYZD50);
 
     const SkGammas* gammas() const { return fGammas.get(); }
 
     const SkColorLookUpTable* colorLUT() const { return fColorLUT.get(); }
 
 private:
 
     /**
      *  FIXME (msarett):
      *  Hiding this function until we can determine if we need it.  Known issues include:
@@ skipping 26 matching lines @@
 
 static inline const SkColorSpace_Base* as_CSB(const SkColorSpace* colorSpace) {
     return static_cast<const SkColorSpace_Base*>(colorSpace);
 }
 
 static inline SkColorSpace_Base* as_CSB(const sk_sp<SkColorSpace>& colorSpace) {
     return static_cast<SkColorSpace_Base*>(colorSpace.get());
 }
 
 #endif