partial switch over to sp usage of shaders

gm/drawbitmaprect.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 "gm.h"
 #include "SkBlurMask.h"
 #include "SkBlurMaskFilter.h"
@@ skipping 52 matching lines @@
                          2 * SK_Scalar1 / 6,
                          3 * SK_Scalar1 / 6,
                          4 * SK_Scalar1 / 6,
                          5 * SK_Scalar1 / 6,
                          SK_Scalar1};
 
     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);
     }
 
     SkImage* image = surface->newImageSnapshot();
 
     SkBitmap tempBM;
 
 #if SK_SUPPORT_GPU
@@ skipping 131 matching lines @@
             canvas->drawBitmapRect(bm, srcRect, dstRect, &paint);
         }
     }
 
 private:
     typedef skiagm::GM INHERITED;
 };
 
 DEF_GM( return new DrawBitmapRectGM(canvasproc, nullptr); )
 DEF_GM( return new DrawBitmapRectGM(imageproc, "-imagerect"); )