Remove SkLerpXfermode

src/core/SkValue.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 SkValue_DEFINED
 #define SkValue_DEFINED
 
@@ skipping 11 matching lines @@
         Bytes, S16s, U16s, S32s, U32s, S64s, U64s, F32s, F64s,
         Array,
 
         kMaxBuiltin = 0xFF,
         // 256-2147483647 may be used by Skia for public Object types.
 
         Matrix,
 
         ArithmeticXfermode,
         DefaultXfermode,
-        LerpXfermode,
         PixelXorXfermode,
         ProcCoeffXfermode,
 
         kMaxPublicObject = 0x7FFFFFFF,
         // 2147483648+ won't be used by Skia.  They're open for
         // client-specific use, testing, etc.
     };
 
     // Each Object type may define its own namespace of Key values,
     // so there are no pre-defined Keys here.
@@ skipping 65 matching lines @@
             || U16s == fType
             || U32s == fType
             || F32s == fType;
     }
     template <typename T> static SkValue FromT(SkValue::Type, T SkValue::*, T);
     template <typename T> static SkValue FromTs(SkValue::Type, SkData*);
     template <typename T> const T* asTs(SkValue::Type, int*) const;
 };
 
 #endif  // SkValue_DEFINED