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

samplecode/SampleSlides.cpp

Index: samplecode/SampleSlides.cpp
diff --git a/samplecode/SampleSlides.cpp b/samplecode/SampleSlides.cpp
index d828ae601f4470e5978231d30b6a2e68719e8496..6bc9a28fd3716615dac573f1c0ee461068de3325 100644
--- a/samplecode/SampleSlides.cpp
+++ b/samplecode/SampleSlides.cpp
@@ -178,32 +178,26 @@ static const GradData gGradData[] = {
 { 5, gColors, gPos2 }
 };
 
-static SkShader* MakeLinear(const SkPoint pts[2], const GradData& data,
-                            SkShader::TileMode tm, SkUnitMapper* mapper) {
-    return SkGradientShader::CreateLinear(pts, data.fColors, data.fPos,
-                                          data.fCount, tm, mapper);
+static SkShader* MakeLinear(const SkPoint pts[2], const GradData& data, SkShader::TileMode tm) {
+    return SkGradientShader::CreateLinear(pts, data.fColors, data.fPos, data.fCount, tm);
 }
 
-static SkShader* MakeRadial(const SkPoint pts[2], const GradData& data,
-                            SkShader::TileMode tm, SkUnitMapper* mapper) {
+static SkShader* MakeRadial(const SkPoint pts[2], const GradData& data, SkShader::TileMode tm) {
     SkPoint center;
     center.set(SkScalarAve(pts[0].fX, pts[1].fX),
                SkScalarAve(pts[0].fY, pts[1].fY));
     return SkGradientShader::CreateRadial(center, center.fX, data.fColors,
-                                          data.fPos, data.fCount, tm, mapper);
+                                          data.fPos, data.fCount, tm);
 }
 
-static SkShader* MakeSweep(const SkPoint pts[2], const GradData& data,
-                           SkShader::TileMode tm, SkUnitMapper* mapper) {
+static SkShader* MakeSweep(const SkPoint pts[2], const GradData& data, SkShader::TileMode tm) {
     SkPoint center;
     center.set(SkScalarAve(pts[0].fX, pts[1].fX),
                SkScalarAve(pts[0].fY, pts[1].fY));
-    return SkGradientShader::CreateSweep(center.fX, center.fY, data.fColors,
-                                         data.fPos, data.fCount, mapper);
+    return SkGradientShader::CreateSweep(center.fX, center.fY, data.fColors, data.fPos, data.fCount);
 }
 
-static SkShader* Make2Radial(const SkPoint pts[2], const GradData& data,
-                             SkShader::TileMode tm, SkUnitMapper* mapper) {
+static SkShader* Make2Radial(const SkPoint pts[2], const GradData& data, SkShader::TileMode tm) {
     SkPoint center0, center1;
     center0.set(SkScalarAve(pts[0].fX, pts[1].fX),
                 SkScalarAve(pts[0].fY, pts[1].fY));
@@ -212,11 +206,10 @@ static SkShader* Make2Radial(const SkPoint pts[2], const GradData& data,
     return SkGradientShader::CreateTwoPointRadial(
                                                   center1, (pts[1].fX - pts[0].fX) / 7,
                                                   center0, (pts[1].fX - pts[0].fX) / 2,
-                                                  data.fColors, data.fPos, data.fCount, tm, mapper);
+                                                  data.fColors, data.fPos, data.fCount, tm);
 }
 
-typedef SkShader* (*GradMaker)(const SkPoint pts[2], const GradData& data,
-                               SkShader::TileMode tm, SkUnitMapper* mapper);
+typedef SkShader* (*GradMaker)(const SkPoint pts[2], const GradData& data, SkShader::TileMode tm);
 static const GradMaker gGradMakers[] = {
     MakeLinear, MakeRadial, MakeSweep, Make2Radial
 };
@@ -236,7 +229,7 @@ static void gradient_slide(SkCanvas* canvas) {
     for (size_t i = 0; i < SK_ARRAY_COUNT(gGradData); i++) {
         canvas->save();
         for (size_t j = 0; j < SK_ARRAY_COUNT(gGradMakers); j++) {
-            SkShader* shader = gGradMakers[j](pts, gGradData[i], tm, NULL);
+            SkShader* shader = gGradMakers[j](pts, gGradData[i], tm);
             paint.setShader(shader);
             canvas->drawRect(r, paint);
             shader->unref();
@@ -335,7 +328,7 @@ static SkShader* make_shader1(const SkIPoint& size) {
                       { SkIntToScalar(size.fX), SkIntToScalar(size.fY) } };
     SkColor colors[] = { SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorRED };
     return SkGradientShader::CreateLinear(pts, colors, NULL,
-                                          SK_ARRAY_COUNT(colors), SkShader::kMirror_TileMode, NULL);
+                                          SK_ARRAY_COUNT(colors), SkShader::kMirror_TileMode);
 }
 
 class Rec {