switch maskfilters to sk_sp

gm/drawlooper.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 64 matching lines @@
         info.fPaintBits = SkLayerDrawLooper::kStyle_Bit | SkLayerDrawLooper::kMaskFilter_Bit;
         info.fColorMode = SkXfermode::kSrc_Mode;
 
         for (size_t i = 0; i < SK_ARRAY_COUNT(gParams); i++) {
             info.fOffset.set(gParams[i].fOffset, gParams[i].fOffset);
             SkPaint* paint = looperBuilder.addLayer(info);
             paint->setColor(gParams[i].fColor);
             paint->setStyle(gParams[i].fStyle);
             paint->setStrokeWidth(gParams[i].fWidth);
             if (gParams[i].fBlur > 0) {
-                SkMaskFilter* mf = SkBlurMaskFilter::Create(kNormal_SkBlurStyle,
-                                         SkBlurMask::ConvertRadiusToSigma(gParams[i].fBlur));
-                paint->setMaskFilter(mf)->unref();
+                paint->setMaskFilter(SkBlurMaskFilter::Make(kNormal_SkBlurStyle,
+                                         SkBlurMask::ConvertRadiusToSigma(gParams[i].fBlur)));
             }
         }
         fLooper = looperBuilder.detach();
     }
 
     typedef GM INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 DEF_GM( return new DrawLooperGM; )