Add SkColorSpace::Equals() API

include/core/SkImageInfo.h

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkImageInfo_DEFINED
 #define SkImageInfo_DEFINED
 
@@ skipping 271 matching lines @@
 
     size_t computeOffset(int x, int y, size_t rowBytes) const {
         SkASSERT((unsigned)x < (unsigned)fWidth);
         SkASSERT((unsigned)y < (unsigned)fHeight);
         return SkColorTypeComputeOffset(fColorType, x, y, rowBytes);
     }
 
     bool operator==(const SkImageInfo& other) const {
         return fWidth == other.fWidth && fHeight == other.fHeight &&
                fColorType == other.fColorType && fAlphaType == other.fAlphaType &&
-               fColorSpace == other.fColorSpace;
+               SkColorSpace::Equals(fColorSpace.get(), other.fColorSpace.get());
     }
     bool operator!=(const SkImageInfo& other) const {
-        return fWidth != other.fWidth || fHeight != other.fHeight ||
-               fColorType != other.fColorType || fAlphaType != other.fAlphaType ||
-               fColorSpace != other.fColorSpace;
+        return !(*this == other);
     }
 
     void unflatten(SkReadBuffer&);
     void flatten(SkWriteBuffer&) const;
 
     int64_t getSafeSize64(size_t rowBytes) const {
         if (0 == fHeight) {
             return 0;
         }
         return sk_64_mul(fHeight - 1, rowBytes) + fWidth * this->bytesPerPixel();
@@ skipping 44 matching lines @@
     // Anything with a color-space attached is gamma-correct, as is F16.
     // To get legacy behavior, you need to ask for non-F16, with a nullptr color space.
     return (cs != nullptr) || kRGBA_F16_SkColorType == ct;
 }
 
 static inline bool SkImageInfoIsGammaCorrect(const SkImageInfo& info) {
     return SkColorAndColorSpaceAreGammaCorrect(info.colorType(), info.colorSpace());
 }
 
 #endif