switch maskfilters to sk_sp

samplecode/SampleAnimBlur.cpp

 /*
  * Copyright 2012 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 "SkAnimTimer.h"
 #include "SkBlurMaskFilter.h"
@@ skipping 28 matching lines @@
     void onDrawContent(SkCanvas* canvas) override {
         static const SkBlurStyle gStyles[] = {
             kNormal_SkBlurStyle,
             kInner_SkBlurStyle,
             kSolid_SkBlurStyle,
             kOuter_SkBlurStyle,
         };
         SkRandom random;
 
         for (size_t i = 0; i < SK_ARRAY_COUNT(gStyles); ++i) {
-            SkMaskFilter* mf = SkBlurMaskFilter::Create(
-                                       gStyles[i],
-                                       fBlurSigma,
-                                       SkBlurMaskFilter::kHighQuality_BlurFlag);
             SkPaint paint;
-            SkSafeUnref(paint.setMaskFilter(mf));
+            paint.setMaskFilter(SkBlurMaskFilter::Make(gStyles[i],
+                                                       fBlurSigma,
+                                                       SkBlurMaskFilter::kHighQuality_BlurFlag));
             paint.setColor(random.nextU() | 0xff000000);
             canvas->drawCircle(200 * SK_Scalar1 + 400 * (i % 2) * SK_Scalar1,
                                200 * SK_Scalar1 + i / 2 * 400 * SK_Scalar1,
                                fCircleRadius, paint);
         }
     }
 
     bool onAnimate(const SkAnimTimer& timer) override {
         fBlurSigma = get_anim_sin(timer.secs(), 100, 4, 5);
         fCircleRadius = 3 + get_anim_sin(timer.secs(), 150, 25, 3);
         return true;
     }
 
 private:
     SkScalar fBlurSigma, fCircleRadius;
 
     typedef SampleView INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 static SkView* MyFactory() { return new AnimBlurView; }
 static SkViewRegister reg(MyFactory);