Hide SkPixelXorXfermode from Chrome

src/effects/SkToFromValue.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 "SkArithmeticMode.h"
 #include "SkMatrix.h"
 #include "SkPixelXorXfermode.h"
@@ skipping 70 matching lines @@
     REQUIRE(getT(val, kK1, &k[1]));
     REQUIRE(getT(val, kK2, &k[2]));
     REQUIRE(getT(val, kK3, &k[3]));
     int32_t enforce = true;
     getT(val, kEnforcePMColor, &enforce);
     dst->reset(SkArithmeticMode::Create(
                        k[0], k[1], k[2], k[3], SkToBool(enforce)));
     return true;
 }
 
+#if SK_INCLUDE_DEPRECATED_XFERMODES
+
 static bool from_value_PixelXorXfermode(const SkValue& val,
                                         SkAutoTUnref<SkXfermode>* dst) {
     uint32_t opColor;
     REQUIRE(getT(val, SkValueKeys::PixelXorXfermode::kOpColor, &opColor));
     dst->reset(SkPixelXorXfermode::Create(opColor));
     return true;
 }
 
+#endif
+
 static bool from_value_ProcCoeffXfermode(const SkValue& val,
                                          SkAutoTUnref<SkXfermode>* dst) {
     uint32_t mode;
     REQUIRE(getT(val, SkValueKeys::ProcCoeffXfermode::kMode, &mode));
     dst->reset(SkXfermode::Create((SkXfermode::Mode)mode));
     return true;
 }
 
 template<> bool SkFromValue< SkAutoTUnref<SkXfermode> >(
         const SkValue& val, SkAutoTUnref<SkXfermode>* dst) {
     switch (val.type()) {
         case SkValue::DefaultXfermode:    return from_value_DefaultXfermode(val, dst);
         case SkValue::ArithmeticXfermode: return from_value_ArithmeticXfermode(val, dst);
+#if SK_INCLUDE_DEPRECATED_XFERMODES
         case SkValue::PixelXorXfermode:   return from_value_PixelXorXfermode(val, dst);
+#endif
         case SkValue::ProcCoeffXfermode:  return from_value_ProcCoeffXfermode(val, dst);
         default:                          REQUIRE(false);
     }
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 
 #undef REQUIRE