Revert of Remove unused (by clients) SkUnitMapper (https://codereview.chromium.org/283273002/)

src/animator/SkDrawGradient.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 SkDrawGradient_DEFINED
 #define SkDrawGradient_DEFINED
 
 #include "SkDrawColor.h"
 #include "SkDrawShader.h"
 #include "SkIntArray.h"
 
+class SkUnitMapper;
+
 class SkDrawGradient : public SkDrawShader {
     DECLARE_PRIVATE_MEMBER_INFO(DrawGradient);
     SkDrawGradient();
     virtual ~SkDrawGradient();
     virtual bool addChild(SkAnimateMaker& , SkDisplayable* child) SK_OVERRIDE;
 #ifdef SK_DUMP_ENABLED
     virtual void dumpRest(SkAnimateMaker*);
 #endif
     virtual void onEndElement(SkAnimateMaker& );
 protected:
     SkTDScalarArray offsets;
     SkString unitMapper;
     SkTDColorArray fColors;
     SkTDDrawColorArray fDrawColors;
+    SkUnitMapper* fUnitMapper;
     int addPrelude();
 private:
     typedef SkDrawShader INHERITED;
 };
 
 class SkDrawLinearGradient : public SkDrawGradient {
     DECLARE_MEMBER_INFO(DrawLinearGradient);
     SkDrawLinearGradient();
     virtual void onEndElement(SkAnimateMaker& );
 #ifdef SK_DUMP_ENABLED
@@ skipping 14 matching lines @@
 #endif
     virtual SkShader* getShader();
 protected:
     SkPoint center;
     SkScalar radius;
 private:
     typedef SkDrawGradient INHERITED;
 };
 
 #endif // SkDrawGradient_DEFINED