Miscellaneous color space refactors

src/core/SkColorSpaceXform.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 SkColorSpaceXform_DEFINED
 #define SkColorSpaceXform_DEFINED
 
@@ skipping 37 matching lines @@
 private:
     SkFastXform(const sk_sp<SkColorSpace>& srcSpace, const SkMatrix44& srcToDst,
                 const sk_sp<SkColorSpace>& dstSpace);
 
     static constexpr int kDstGammaTableSize = 1024;
 
     // May contain pointers into storage or pointers into precomputed tables.
     const float*         fSrcGammaTables[3];
     float                fSrcGammaTableStorage[3 * 256];
 
-    float                fSrcToDst[12];
+    float                fSrcToDst[16];
 
     // May contain pointers into storage or pointers into precomputed tables.
     const uint8_t*       fDstGammaTables[3];
     uint8_t              fDstGammaTableStorage[3 * kDstGammaTableSize];
 
     friend class SkColorSpaceXform;
 };
 
 /**
  *  Works for any valid src and dst profiles.
@@ skipping 21 matching lines @@
     const SkMatrix44          fSrcToDst;
 
     // May contain pointers into storage or pointers into precomputed tables.
     const uint8_t*            fDstGammaTables[3];
     uint8_t                   fDstGammaTableStorage[3 * kDstGammaTableSize];
 
     friend class SkColorSpaceXform;
 };
 
 #endif