partial switch over to sp usage of shaders

gm/drawminibitmaprect.cpp

 /*
  * Copyright 2015 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 "SkColorPriv.h"
 #include "SkGradientShader.h"
@@ skipping 28 matching lines @@
                                       3 * SK_Scalar1 / 6,
                                       4 * SK_Scalar1 / 6,
                                       5 * SK_Scalar1 / 6,
                                       SK_Scalar1};
 
     SkASSERT(SK_ARRAY_COUNT(colors) == SK_ARRAY_COUNT(pos));
     SkPaint     paint;
     SkRect rect = SkRect::MakeWH(wScalar, hScalar);
     SkMatrix mat = SkMatrix::I();
     for (int i = 0; i < 4; ++i) {
-        paint.setShader(SkGradientShader::CreateRadial(
+        paint.setShader(SkGradientShader::MakeRadial(
                         pt, radius,
                         colors, pos,
                         SK_ARRAY_COUNT(colors),
                         SkShader::kRepeat_TileMode,
-                        0, &mat))->unref();
+                        0, &mat));
         canvas->drawRect(rect, paint);
         rect.inset(wScalar / 8, hScalar / 8);
         mat.postScale(SK_Scalar1 / 4, SK_Scalar1 / 4);
     }
     return surface->newImageSnapshot();
 }
 
 static const int gSize = 1024;
 static const int gSurfaceSize = 2048;
 
@@ skipping 69 matching lines @@
     bool                  fAA;
     SkAutoTUnref<SkImage> fImage;
     SkString              fName;
 
     typedef skiagm::GM INHERITED;
 };
 
 DEF_GM( return new DrawMiniBitmapRectGM(true); )
 DEF_GM( return new DrawMiniBitmapRectGM(false); )