Update MatrixConvolutionImageFilter to sk_sp

bench/MatrixConvolutionBench.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "Benchmark.h"
 #include "SkCanvas.h"
 #include "SkMatrixConvolutionImageFilter.h"
 #include "SkPaint.h"
 #include "SkRandom.h"
 #include "SkString.h"
 
 class MatrixConvolutionBench : public Benchmark {
 public:
     MatrixConvolutionBench(SkMatrixConvolutionImageFilter::TileMode tileMode, bool convolveAlpha)
         : fName("matrixconvolution") {
         SkISize kernelSize = SkISize::Make(3, 3);
         SkScalar kernel[9] = {
             SkIntToScalar( 1), SkIntToScalar( 1), SkIntToScalar( 1),
             SkIntToScalar( 1), SkIntToScalar(-7), SkIntToScalar( 1),
             SkIntToScalar( 1), SkIntToScalar( 1), SkIntToScalar( 1),
         };
         SkScalar gain = 0.3f, bias = SkIntToScalar(100);
         SkIPoint kernelOffset = SkIPoint::Make(1, 1);
-        fFilter = SkMatrixConvolutionImageFilter::Create(kernelSize, kernel, gain, bias, kernelOffset, tileMode, convolveAlpha);
-    }
-
-    ~MatrixConvolutionBench() {
-        fFilter->unref();
+        fFilter = SkMatrixConvolutionImageFilter::Make(kernelSize, kernel, gain, bias, 
+                                                       kernelOffset, tileMode, convolveAlpha,
+                                                       nullptr);
     }
 
 protected:
     virtual const char* onGetName() {
         return fName.c_str();
     }
 
     virtual void onDraw(int loops, SkCanvas* canvas) {
         SkPaint paint;
         this->setupPaint(&paint);
         paint.setAntiAlias(true);
         SkRandom rand;
         for (int i = 0; i < loops; i++) {
             SkRect r = SkRect::MakeWH(rand.nextUScalar1() * 400,
                                       rand.nextUScalar1() * 400);
             paint.setImageFilter(fFilter);
             canvas->drawOval(r, paint);
         }
     }
 
 private:
+    sk_sp<SkImageFilter> fFilter;
+    SkString fName;
+
     typedef Benchmark INHERITED;
-    SkImageFilter* fFilter;
-    SkString fName;
 };
 
 DEF_BENCH( return new MatrixConvolutionBench(SkMatrixConvolutionImageFilter::kClamp_TileMode, true); )
 DEF_BENCH( return new MatrixConvolutionBench(SkMatrixConvolutionImageFilter::kRepeat_TileMode, true); )
 DEF_BENCH( return new MatrixConvolutionBench(SkMatrixConvolutionImageFilter::kClampToBlack_TileMode, true); )
 DEF_BENCH( return new MatrixConvolutionBench(SkMatrixConvolutionImageFilter::kClampToBlack_TileMode, false); )