Refactor parsing and storage of SkGammas

src/core/SkColorSpaceXform.h

Index: src/core/SkColorSpaceXform.h
diff --git a/src/core/SkColorSpaceXform.h b/src/core/SkColorSpaceXform.h
index 16b8cfaa336fb1456bc22a7893454ef2b5b5859f..061bc366fbfca46009e1f6d703aeb00b129ffa45 100644
--- a/src/core/SkColorSpaceXform.h
+++ b/src/core/SkColorSpaceXform.h
@@ -76,12 +76,11 @@ public:
     void applyTo8888(SkPMColor* dst, const RGBA32* src, int len) const override;
     void applyToF16(RGBAF16* dst, const RGBA32* src, int len) const override;
 
+    static constexpr int kDstGammaTableSize = 1024;
 private:
     SkDefaultXform(const sk_sp<SkColorSpace>& srcSpace, const SkMatrix44& srcToDst,
                    const sk_sp<SkColorSpace>& dstSpace);
 
-    static constexpr int      kDstGammaTableSize = 1024;
-
     sk_sp<SkColorLookUpTable> fColorLUT;
 
     // May contain pointers into storage or pointers into precomputed tables.