Add SkColorSpace to SkImageInfo

include/core/SkColorSpace.h

Index: include/core/SkColorSpace.h
diff --git a/include/core/SkColorSpace.h b/include/core/SkColorSpace.h
index 12087f5e336d05b40cce498714d59996883d4554..ba7a4cfde2f5f1b1fdba1d4fab0c7e5d8b9a065e 100644
--- a/include/core/SkColorSpace.h
+++ b/include/core/SkColorSpace.h
@@ -48,6 +48,28 @@ public:
      */
     SkGammas* gammas() const { return fGammas.get(); }
 
+    enum GammaNamed {
+        kLinear_GammaNamed,
+
+        /**
+         *  Gamma curve is a close match to the canonical sRGB gamma curve or another
+         *  similar gamma curve.
+         *
+         *  sRGB gamma curves have a short linear segment followed by an exponential (e = 2.4f).
+         *  This is very similar to another common exponential curve (e = 2.2f).
+         */
+        kSRGBCurve_GammaNamed,
+
+        /**
+         *  Gamma is represented by a look-up table, a parametric curve, or an uncommon
+         *  exponential curve.  Or there is an additional pre-processing step before the
+         *  applying the gamma.
+         */
+        kNonStandard_GammaNamed,
+    };
+
+    GammaNamed gammaNamed() { return fGammaNamed; }
+
     /**
      *  Returns the matrix used to transform src gamut to XYZ D50.
      */
@@ -70,10 +92,13 @@ private:
 
     SkColorSpace(sk_sp<SkGammas> gammas, const SkMatrix44& toXYZ, Named);
 
+    SkColorSpace(sk_sp<SkGammas> gammas, GammaNamed gammaNamed, const SkMatrix44& toXYZ, Named);
+
     SkColorSpace(SkColorLookUpTable* colorLUT, sk_sp<SkGammas> gammas, const SkMatrix44& toXYZ);
 
     SkAutoTDelete<SkColorLookUpTable> fColorLUT;
     sk_sp<SkGammas>                   fGammas;
+    const GammaNamed                  fGammaNamed;
     const SkMatrix44                  fToXYZD50;
     const Named                       fNamed;
 };