Update SkMatrixImageFilter to sk_sp

gm/imagefiltersstroked.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 "sk_tool_utils.h"
 #include "SkBlurImageFilter.h"
 #include "SkColor.h"
@@ skipping 39 matching lines @@
     void onDraw(SkCanvas* canvas) override {
         void (*drawProc[])(SkCanvas*, const SkRect&, const SkPaint&) = {
             draw_line, draw_rect, draw_circle,
         };
 
         canvas->clear(SK_ColorBLACK);
 
         SkMatrix resizeMatrix;
         resizeMatrix.setScale(RESIZE_FACTOR_X, RESIZE_FACTOR_Y);
 
-        SkImageFilter* filters[] = {
-            SkBlurImageFilter::Make(5, 5, nullptr).release(),
-            SkDropShadowImageFilter::Create(10, 10, 3, 3, SK_ColorGREEN,
-                SkDropShadowImageFilter::kDrawShadowAndForeground_ShadowMode),
-            SkOffsetImageFilter::Make(-16, 32, nullptr).release(),
-            SkImageFilter::CreateMatrixFilter(resizeMatrix, kNone_SkFilterQuality),
+        sk_sp<SkImageFilter> filters[] = {
+            SkBlurImageFilter::Make(5, 5, nullptr),
+            sk_sp<SkImageFilter>(SkDropShadowImageFilter::Create(10, 10, 3, 3, SK_ColorGREEN,
+                            SkDropShadowImageFilter::kDrawShadowAndForeground_ShadowMode)),
+            SkOffsetImageFilter::Make(-16, 32, nullptr),
+            SkImageFilter::MakeMatrixFilter(resizeMatrix, kNone_SkFilterQuality, nullptr),
         };
 
         SkRect r = SkRect::MakeWH(64, 64);
         SkScalar margin = 32;
         SkPaint paint;
         paint.setColor(SK_ColorWHITE);
         paint.setAntiAlias(true);
         paint.setStrokeWidth(10);
         paint.setStyle(SkPaint::kStroke_Style);
         paint.setTextSize(48);
@@ skipping 12 matching lines @@
                                   SkScalarInvert(RESIZE_FACTOR_Y));
                 }
                 paint.setImageFilter(filters[j]);
                 drawProc[i](canvas, r, paint);
                 canvas->restore();
                 canvas->translate(r.width() + margin, 0);
             }
             canvas->restore();
             canvas->translate(0, r.height());
         }
-
-        for (size_t i = 0; i < SK_ARRAY_COUNT(filters); ++i) {
-            SkSafeUnref(filters[i]);
-        }
     }
 
 private:
     typedef GM INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 DEF_GM(return new ImageFiltersStrokedGM;)
 
 }