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

samplecode/SampleLayers.cpp

 
 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "SampleCode.h"
 #include "SkView.h"
 #include "SkCanvas.h"
@@ skipping 13 matching lines @@
 #include "SkTypeface.h"
 #include "SkUtils.h"
 #include "SkKey.h"
 #include "SkXfermode.h"
 #include "SkDrawFilter.h"
 
 static void make_paint(SkPaint* paint, const SkMatrix& localMatrix) {
     SkColor colors[] = { 0, SK_ColorWHITE };
     SkPoint pts[] = { { 0, 0 }, { 0, SK_Scalar1*20 } };
     SkShader* s = SkGradientShader::CreateLinear(pts, colors, NULL, 2, SkShader::kClamp_TileMode,
-                                                 0, &localMatrix);
+                                                 NULL, 0, &localMatrix);
 
     paint->setShader(s)->unref();
     paint->setXfermodeMode(SkXfermode::kDstIn_Mode);
 }
 
 static void dump_layers(const char label[], SkCanvas* canvas) {
     SkDebugf("Dump Layers(%s)\n", label);
 
     SkCanvas::LayerIter iter(canvas, true);
     int index = 0;
@@ skipping 186 matching lines @@
     }
 
 private:
     typedef SkView INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 static SkView* MyFactory() { return new LayersView; }
 static SkViewRegister reg(MyFactory);