Make SkColorSpace a public API

src/core/SkColorSpace_Base.h

Index: src/core/SkColorSpace_Base.h
diff --git a/src/core/SkColorSpacePriv.h b/src/core/SkColorSpace_Base.h
similarity index 70%
rename from src/core/SkColorSpacePriv.h
rename to src/core/SkColorSpace_Base.h
index 47fab647ff19ac5b13564cc0e7b8735a043f6cd0..b2a46f193f637e1746b68d902bfdfd66b9e9739e 100644
--- a/src/core/SkColorSpacePriv.h
+++ b/src/core/SkColorSpace_Base.h
@@ -5,8 +5,10 @@
  * found in the LICENSE file.
  */
 
-#ifndef SkColorSpacePriv_DEFINED
-#define SkColorSpacePriv_DEFINED
+#ifndef SkColorSpace_Base_DEFINED
+#define SkColorSpace_Base_DEFINED
+
+#include "SkColorSpace.h"
 
 struct SkGammaCurve {
     bool isValue() const {
@@ -86,4 +88,30 @@ struct SkColorLookUpTable {
     }
 };
 
+class SkColorSpace_Base : public SkColorSpace {
+public:
+
+    SkGammas* gammas() const { return fGammas.get(); }
+
+private:
+
+    SkColorSpace_Base(sk_sp<SkGammas> gammas, const SkMatrix44& toXYZ, Named);
+
+    SkColorSpace_Base(sk_sp<SkGammas> gammas, GammaNamed gammaNamed, const SkMatrix44& toXYZ,
+                      Named);
+
+    SkColorSpace_Base(SkColorLookUpTable* colorLUT, sk_sp<SkGammas> gammas,
+                      const SkMatrix44& toXYZ);
+
+    SkAutoTDelete<SkColorLookUpTable> fColorLUT;
+    sk_sp<SkGammas>                   fGammas;
+
+    friend class SkColorSpace;
+    typedef SkColorSpace INHERITED;
+};
+
+static inline SkColorSpace_Base* as_CSB(SkColorSpace* colorSpace) {
+    return static_cast<SkColorSpace_Base*>(colorSpace);
+}
+
 #endif