Initial error handling code

include/core/SkUnitMapper.h

 
 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #ifndef SkUnitMapper_DEFINED
 #define SkUnitMapper_DEFINED
 
 #include "SkRefCnt.h"
 #include "SkScalar.h"
 
 #include "SkFlattenable.h"
 
 class SkUnitMapper : public SkFlattenable {
 public:
     SK_DECLARE_INST_COUNT(SkUnitMapper)
 
     SkUnitMapper() {}
 
     /** Given a value in [0..0xFFFF], return a value in the same range.
     */
     virtual uint16_t mapUnit16(uint16_t x) = 0;
 
+    SK_DEFINE_FLATTENABLE_TYPE(SkUnitMapper)
+
 protected:
     SkUnitMapper(SkFlattenableReadBuffer& rb) : SkFlattenable(rb) {}
 
 private:
     typedef SkFlattenable INHERITED;
 };
 
 #endif