Add SkColorSpaceTransferFn to SkColorSpace

src/core/SkColorSpaceXform.cpp

 /*
  * Copyright 2016 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkColorPriv.h"
 #include "SkColorSpace_Base.h"
 #include "SkColorSpacePriv.h"
@@ skipping 285 matching lines @@
                 } else if (gammas->isValue(i)) {
                     (*fns.fBuildFromValue)(&gammaTableStorage[i * gammaTableSize],
                                            gammas->data(i).fValue);
                     outGammaTables[i] = &gammaTableStorage[i * gammaTableSize];
                 } else if (gammas->isTable(i)) {
                     (*fns.fBuildFromTable)(&gammaTableStorage[i * gammaTableSize], gammas->table(i),
                                            gammas->data(i).fTable.fSize);
                     outGammaTables[i] = &gammaTableStorage[i * gammaTableSize];
                 } else {
                     SkASSERT(gammas->isParametric(i));
-                    const SkGammas::Params& params = gammas->params(i);
+                    const SkColorSpaceTransferFn& params = gammas->params(i);
                     (*fns.fBuildFromParam)(&gammaTableStorage[i * gammaTableSize], params.fG,
                                            params.fA, params.fB, params.fC, params.fD, params.fE,
                                            params.fF);
                     outGammaTables[i] = &gammaTableStorage[i * gammaTableSize];
                 }
             };
 
             if (gammasAreMatching) {
                 build_table(0);
                 outGammaTables[1] = outGammaTables[0];
@@ skipping 1115 matching lines @@
     }
 }
 
 ///////////////////////////////////////////////////////////////////////////////////////////////////
 
 std::unique_ptr<SkColorSpaceXform> SlowIdentityXform(SkColorSpace* space) {
         return std::unique_ptr<SkColorSpaceXform>(new SkColorSpaceXform_Base
                 <kTable_SrcGamma, kTable_DstGamma, kNone_ColorSpaceMatch>
                 (space, SkMatrix::I(), space));
 }