switch maskfilters to sk_sp

gm/drawfilter.cpp

 /*
  * Copyright 2015 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 15 matching lines @@
 public:
     bool filter(SkPaint* p, Type) override {
         p->setColor(SK_ColorRED);
         p->setMaskFilter(nullptr);
         return true;
     }
 };
 }
 
 class DrawFilterGM : public skiagm::GM {
-    SkAutoTUnref<SkMaskFilter> fBlur;
+    sk_sp<SkMaskFilter> fBlur;
 
 protected:
     SkISize onISize() override {
         return SkISize::Make(320, 240);
     }
 
     SkString onShortName() override {
         return SkString("drawfilter");
     }
 
     void onOnceBeforeDraw() override {
-        fBlur.reset(SkBlurMaskFilter::Create(kNormal_SkBlurStyle,
+        fBlur = SkBlurMaskFilter::Make(kNormal_SkBlurStyle,
                     SkBlurMask::ConvertRadiusToSigma(10.0f),
-                    kLow_SkBlurQuality));
+                    kLow_SkBlurQuality);
     }
 
     void onDraw(SkCanvas* canvas) override {
         SkPaint p;
         p.setColor(SK_ColorBLUE);
-        p.setMaskFilter(fBlur.get());
+        p.setMaskFilter(fBlur);
         SkRect r = { 20, 20, 100, 100 };
         canvas->setDrawFilter(nullptr);
         canvas->drawRect(r, p);
         TestFilter redNoBlur;
         canvas->setDrawFilter(&redNoBlur);
         canvas->translate(120.0f, 40.0f);
         canvas->drawRect(r, p);
 
         // Must unset if the DrawFilter is from the stack to avoid refcount errors!
         canvas->setDrawFilter(nullptr);
     }
 
 private:
     typedef GM INHERITED;
 };
 
 DEF_GM( return new DrawFilterGM; )
 
 #endif