partial switch over to sp usage of shaders

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"
@@ skipping 10 matching lines @@
     }
 
 protected:
     void onOnceBeforeDraw() override {
         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, nullptr,
-                                                    SK_ARRAY_COUNT(colors), 0, &local);
-
         SkPaint paint;
         paint.setAntiAlias(true);
-        paint.setShader(s)->unref();
+        paint.setShader(SkGradientShader::MakeSweep(0, 0, colors, nullptr, SK_ARRAY_COUNT(colors),
+                                                    0, &local));
 
-        SkTypeface* orig = sk_tool_utils::create_portable_typeface("serif",
-                                                            SkTypeface::kBold);
+        SkTypeface* orig = sk_tool_utils::create_portable_typeface("serif", SkTypeface::kBold);
         if (nullptr == orig) {
             orig = SkTypeface::RefDefault();
         }
         fColorType = new SkGTypeface(orig, paint);
         orig->unref();
     }
 
     SkString onShortName() override {
         return SkString("colortype");
     }
@@ skipping 14 matching lines @@
         }
     }
 
 private:
     SkTypeface* fColorType;
 
     typedef skiagm::GM INHERITED;
 };
 
 DEF_GM(return new ColorTypeGM;)