switch maskfilters to sk_sp

samplecode/SampleStrokePath.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 147 matching lines @@
             paint.setColor(SK_ColorWHITE);
             canvas->translate(10, 30);
 
             static const SkBlurStyle gStyle[] = {
                 kNormal_SkBlurStyle,
                 kInner_SkBlurStyle,
                 kOuter_SkBlurStyle,
                 kSolid_SkBlurStyle,
             };
             for (int x = 0; x < 5; x++) {
-                SkMaskFilter* mf;
                 SkScalar sigma = SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(4));
                 for (int y = 0; y < 10; y++) {
                     if (x) {
-                        mf = SkBlurMaskFilter::Create(gStyle[x - 1], sigma);
-                        paint.setMaskFilter(mf)->unref();
+                        paint.setMaskFilter(SkBlurMaskFilter::Make(gStyle[x - 1], sigma));
                     }
                     canvas->drawText("Title Bar", 9, x*SkIntToScalar(100), y*SkIntToScalar(30), paint);
                     sigma *= 0.75f;
                 }
 
             }
             return;
         }
 
         paint.setColor(SK_ColorBLUE);
@@ skipping 29 matching lines @@
         return this->INHERITED::onFindClickHandler(x, y, modi);
     }
 private:
     typedef SampleView INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 static SkView* MyFactory() { return new StrokePathView; }
 static SkViewRegister reg(MyFactory);