Revert of remove unused (by clients) SkUnitMapper

gm/colortype.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "gm.h"
 #include "SkCanvas.h"
 #include "SkGradientShader.h"
 #include "../src/fonts/SkGScalerContext.h"
 
 class ColorTypeGM : public skiagm::GM {
 public:
     ColorTypeGM() {
         const SkColor colors[] = {
             SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE,
             SK_ColorMAGENTA, SK_ColorCYAN, SK_ColorYELLOW
         };
         SkMatrix local;
         local.setRotate(180);
         SkShader* s = SkGradientShader::CreateSweep(0,0, colors, NULL,
-                                                    SK_ARRAY_COUNT(colors), 0, &local);
+                                                    SK_ARRAY_COUNT(colors), NULL, 0, &local);
 
         SkPaint paint;
         paint.setAntiAlias(true);
         paint.setShader(s)->unref();
 
         SkTypeface* orig = SkTypeface::CreateFromName("Times",
                                                       SkTypeface::kBold);
         if (NULL == orig) {
             orig = SkTypeface::RefDefault();
         }
@@ skipping 30 matching lines @@
         return kSkipPipe_Flag | kSkipPicture_Flag;
     }
 
 private:
     SkTypeface* fColorType;
 
     typedef skiagm::GM INHERITED;
 };
 
 DEF_GM( return SkNEW(ColorTypeGM); )