switch maskfilters to sk_sp

include/effects/SkBlurDrawLooper.h

 /*
  * Copyright 2008 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #ifndef SkBlurDrawLooper_DEFINED
 #define SkBlurDrawLooper_DEFINED
@@ skipping 28 matching lines @@
                                     uint32_t flags = kNone_BlurFlag) {
         return sk_sp<SkDrawLooper>(new SkBlurDrawLooper(color, sigma, dx, dy, flags));
     }
 #ifdef SK_SUPPORT_LEGACY_MINOR_EFFECT_PTR
     static SkDrawLooper* Create(SkColor color, SkScalar sigma, SkScalar dx, SkScalar dy,
                                 uint32_t flags = kNone_BlurFlag) {
         return Make(color, sigma, dx, dy, flags).release();
     }
 #endif
 
-    virtual ~SkBlurDrawLooper();
-
     SkDrawLooper::Context* createContext(SkCanvas*, void* storage) const override;
 
     size_t contextSize() const override { return sizeof(BlurDrawLooperContext); }
 
     SK_TO_STRING_OVERRIDE()
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkBlurDrawLooper)
 
 protected:
     SkBlurDrawLooper(SkColor color, SkScalar sigma, SkScalar dx, SkScalar dy,
                      uint32_t flags);
 
     void flatten(SkWriteBuffer&) const override;
 
     bool asABlurShadow(BlurShadowRec*) const override;
 
 private:
-    SkMaskFilter*   fBlur;
+    sk_sp<SkMaskFilter>  fBlur;
     sk_sp<SkColorFilter> fColorFilter;
     SkScalar        fDx, fDy, fSigma;
     SkColor         fBlurColor;
     uint32_t        fBlurFlags;
 
     enum State {
         kBeforeEdge,
         kAfterEdge,
         kDone
     };
 
     class BlurDrawLooperContext : public SkDrawLooper::Context {
     public:
         explicit BlurDrawLooperContext(const SkBlurDrawLooper* looper);
 
         bool next(SkCanvas* canvas, SkPaint* paint) override;
 
     private:
         const SkBlurDrawLooper* fLooper;
         State fState;
     };
 
     void init(SkScalar sigma, SkScalar dx, SkScalar dy, SkColor color, uint32_t flags);
     void initEffects();
 
     typedef SkDrawLooper INHERITED;
 };
 
 #endif