switch maskfilters to sk_sp

samplecode/SampleXfermodesBlur.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 "SkView.h"
 #include "SkBlurMask.h"
@@ skipping 24 matching lines @@
 
 static uint16_t gBG[] = { 0xFFFF, 0xCCCF, 0xCCCF, 0xFFFF };
 
 class XfermodesBlurView : public SampleView {
     SkBitmap    fBG;
     SkBitmap    fSrcB, fDstB;
 
     void draw_mode(SkCanvas* canvas, sk_sp<SkXfermode> mode, int alpha,
                    SkScalar x, SkScalar y) {
         SkPaint p;
-        SkMaskFilter* mf = SkBlurMaskFilter::Create(kNormal_SkBlurStyle,
-                                       SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(5)),
-                                       SkBlurMaskFilter::kNone_BlurFlag);
-        p.setMaskFilter(mf)->unref();
+        p.setMaskFilter(SkBlurMaskFilter::Make(kNormal_SkBlurStyle,
+                                               SkBlurMask::ConvertRadiusToSigma(5),
+                                               SkBlurMaskFilter::kNone_BlurFlag));
 
         SkScalar ww = SkIntToScalar(W);
         SkScalar hh = SkIntToScalar(H);
 
         // draw a circle covering the upper
         // left three quarters of the canvas
         p.setColor(0xFFCC44FF);
         SkRect r;
         r.set(0, 0, ww*3/4, hh*3/4);
         r.offset(x, y);
@@ skipping 135 matching lines @@
     }
 
 private:
     typedef SampleView INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 static SkView* MyFactory() { return new XfermodesBlurView; }
 static SkViewRegister reg(MyFactory);