Update DropShadowImageFilter to sk_sp

gm/imagefilterstransformed.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 47 matching lines @@
 
     void onOnceBeforeDraw() override {
         fCheckerboard = SkImage::MakeFromBitmap(
             sk_tool_utils::create_checkerboard_bitmap(64, 64, 0xFFA0A0A0, 0xFF404040, 8));
         fGradientCircle = make_gradient_circle(64, 64);
     }
 
     void onDraw(SkCanvas* canvas) override {
         sk_sp<SkImageFilter> gradient(SkImageSource::Make(fGradientCircle));
         sk_sp<SkImageFilter> checkerboard(SkImageSource::Make(fCheckerboard));
-        SkImageFilter* filters[] = {
-            SkBlurImageFilter::Make(12, 0, nullptr).release(),
-            SkDropShadowImageFilter::Create(0, 15, 8, 0, SK_ColorGREEN,
-                SkDropShadowImageFilter::kDrawShadowAndForeground_ShadowMode),
-            SkDisplacementMapEffect::Create(SkDisplacementMapEffect::kR_ChannelSelectorType,
+        sk_sp<SkImageFilter> filters[] = {
+            SkBlurImageFilter::Make(12, 0, nullptr),
+            SkDropShadowImageFilter::Make(0, 15, 8, 0, SK_ColorGREEN,
+                SkDropShadowImageFilter::kDrawShadowAndForeground_ShadowMode, nullptr),
+            sk_sp<SkImageFilter>(SkDisplacementMapEffect::Create(
+                                            SkDisplacementMapEffect::kR_ChannelSelectorType,
                                             SkDisplacementMapEffect::kR_ChannelSelectorType,
                                             12,
                                             gradient.get(),
-                                            checkerboard.get()),
-            SkDilateImageFilter::Make(2, 2, checkerboard).release(),
-            SkErodeImageFilter::Make(2, 2, checkerboard).release(),
+                                            checkerboard.get())),
+            SkDilateImageFilter::Make(2, 2, checkerboard),
+            SkErodeImageFilter::Make(2, 2, checkerboard),
         };
 
         const SkScalar margin = SkIntToScalar(20);
         const SkScalar size = SkIntToScalar(60);
 
         for (size_t j = 0; j < 3; j++) {
             canvas->save();
             canvas->translate(margin, 0);
             for (size_t i = 0; i < SK_ARRAY_COUNT(filters); ++i) {
                 SkPaint paint;
@@ skipping 10 matching lines @@
                 }
                 canvas->translate(-size * SK_ScalarHalf, -size * SK_ScalarHalf);
                 canvas->drawOval(SkRect::MakeXYWH(0, size * SkDoubleToScalar(0.1),
                                                   size, size * SkDoubleToScalar(0.6)), paint);
                 canvas->restore();
                 canvas->translate(size + margin, 0);
             }
             canvas->restore();
             canvas->translate(0, size + margin);
         }
-
-        for (size_t i = 0; i < SK_ARRAY_COUNT(filters); ++i) {
-            SkSafeUnref(filters[i]);
-        }
     }
 
 private:
     sk_sp<SkImage> fCheckerboard;
     sk_sp<SkImage> fGradientCircle;
     typedef GM INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 DEF_GM( return new ImageFiltersTransformedGM; )
 
 }