Revert of remove unused (by clients) SkUnitMapper

include/core/SkShader.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 SkShader_DEFINED
 #define SkShader_DEFINED
 
 #include "SkBitmap.h"
 #include "SkFlattenable.h"
 #include "SkMask.h"
 #include "SkMatrix.h"
 #include "SkPaint.h"
 
 class SkPath;
 class SkPicture;
 class SkXfermode;
 class GrContext;
 class GrEffectRef;
 
-#ifdef SK_SUPPORT_LEGACY_DEADUNITMAPPERTYPE
-    class SkDeadUnitMapperType;
-#endif
-
 /** \class SkShader
  *
  *  Shaders specify the source color(s) for what is being drawn. If a paint
  *  has no shader, then the paint's color is used. If the paint has a
  *  shader, then the shader's color(s) are use instead, but they are
  *  modulated by the paint's alpha. This makes it easy to create a shader
  *  once (e.g. bitmap tiling or gradient) and then change its transparency
  *  w/o having to modify the original shader... only the paint's alpha needs
  *  to be modified.
  */
@@ skipping 427 matching lines @@
      */
     virtual Context* onCreateContext(const ContextRec&, void* storage) const;
 
 private:
     SkMatrix fLocalMatrix;
 
     typedef SkFlattenable INHERITED;
 };
 
 #endif