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

gm/convexpolyclip.cpp

 
 /*
  * Copyright 2014 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"
 
@@ skipping 28 matching lines @@
 
     SkPaint paint;
     SkRect rect = SkRect::MakeWH(wScalar, hScalar);
     SkMatrix mat = SkMatrix::I();
     for (int i = 0; i < 4; ++i) {
         paint.setShader(SkGradientShader::CreateRadial(
                         pt, radius,
                         colors, pos,
                         SK_ARRAY_COUNT(colors),
                         SkShader::kRepeat_TileMode,
-                        0, &mat))->unref();
+                        NULL, 0, &mat))->unref();
         canvas.drawRect(rect, paint);
         rect.inset(wScalar / 8, hScalar / 8);
         mat.preTranslate(6 * wScalar, 6 * hScalar);
         mat.postScale(SK_Scalar1 / 3, SK_Scalar1 / 3);
     }
 
     paint.setAntiAlias(true);
     paint.setTextSize(wScalar / 2.2f);
     paint.setShader(0);
     paint.setColor(SK_ColorLTGRAY);
@@ skipping 232 matching lines @@
 
     SkTLList<Clip>   fClips;
     SkBitmap         fBmp;
 
     typedef GM INHERITED;
 };
 
 DEF_GM( return SkNEW(ConvexPolyClip); )
 
 }