switch maskfilters to sk_sp

samplecode/SampleTextAlpha.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 "SampleCode.h"
 #include "SkBlurMask.h"
 #include "SkBlurMaskFilter.h"
 #include "SkCanvas.h"
@@ skipping 34 matching lines @@
     void onDrawContent(SkCanvas* canvas) override {
         const char* str = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
         SkPaint paint;
         SkScalar    x = SkIntToScalar(10);
         SkScalar    y = SkIntToScalar(20);
 
         paint.setFlags(0x105);
 
         paint.setARGB(fByte, 0xFF, 0xFF, 0xFF);
 
-        paint.setMaskFilter(SkBlurMaskFilter::Create(kNormal_SkBlurStyle,
-                                    SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(3))));
-        paint.getMaskFilter()->unref();
+        paint.setMaskFilter(SkBlurMaskFilter::Make(kNormal_SkBlurStyle,
+                                                   SkBlurMask::ConvertRadiusToSigma(3)));
 
         SkRandom rand;
 
         for (int ps = 6; ps <= 35; ps++) {
             paint.setColor(rand.nextU() | (0xFF << 24));
             paint.setTextSize(SkIntToScalar(ps));
             paint.setTextSize(SkIntToScalar(24));
             canvas->drawText(str, strlen(str), x, y, paint);
             y += paint.getFontMetrics(nullptr);
         }
@@ skipping 18 matching lines @@
 private:
     int fByte;
 
     typedef SampleView INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 static SkView* MyFactory() { return new TextAlphaView; }
 static SkViewRegister reg(MyFactory);