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

gm/alphagradients.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"
@@ skipping 11 matching lines @@
         return SkISize::Make(640, 480);
     }
 
     static void draw_grad(SkCanvas* canvas, const SkRect& r,
                           SkColor c0, SkColor c1, bool doPreMul) {
         SkColor colors[] = { c0, c1 };
         SkPoint pts[] = { { r.fLeft, r.fTop }, { r.fRight, r.fBottom } };
         SkPaint paint;
         uint32_t flags = doPreMul ? SkGradientShader::kInterpolateColorsInPremul_Flag : 0;
         SkShader* s = SkGradientShader::CreateLinear(pts, colors, NULL, 2,
-                                                     SkShader::kClamp_TileMode,
-                                                     NULL, flags);
+                                                     SkShader::kClamp_TileMode, flags, NULL);
         paint.setShader(s)->unref();
         canvas->drawRect(r, paint);
 
         paint.setShader(NULL);
         paint.setStyle(SkPaint::kStroke_Style);
         canvas->drawRect(r, paint);
     }
 
     virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
         static const struct {
@@ skipping 29 matching lines @@
         }
     }
 
     virtual uint32_t onGetFlags() const { return kSkipPipe_Flag | kSkipTiled_Flag; }
 
 private:
     typedef skiagm::GM INHERITED;
 };
 
 DEF_GM( return SkNEW(AlphaGradientsGM); )