Update DownSampleImageFilter to sk_sp

samplecode/SampleFilterFuzz.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "SampleCode.h"
 #include "Sk1DPathEffect.h"
 #include "Sk2DPathEffect.h"
 #include "SkAlphaThresholdFilter.h"
@@ skipping 568 matching lines @@
     case BLUR:
         filter = SkBlurImageFilter::Make(make_scalar(true),
                                          make_scalar(true),
                                          make_image_filter());
         break;
     case MAGNIFIER:
         filter = sk_sp<SkImageFilter>(SkMagnifierImageFilter::Create(make_rect(), 
                                                                      make_scalar(true)));
         break;
     case DOWN_SAMPLE:
-        filter = sk_sp<SkImageFilter>(SkDownSampleImageFilter::Create(make_scalar()));
+        filter = SkDownSampleImageFilter::Make(make_scalar(), make_image_filter());
         break;
     case XFERMODE:
         filter = SkXfermodeImageFilter::Make(SkXfermode::Make(make_xfermode()),
                                              make_image_filter(),
                                              make_image_filter(),
                                              nullptr);
         break;
     case OFFSET:
         filter = SkOffsetImageFilter::Make(make_scalar(), make_scalar(), make_image_filter());
         break;
@@ skipping 250 matching lines @@
     }
 
 private:
     typedef SkView INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 static SkView* MyFactory() { return new ImageFilterFuzzView; }
 static SkViewRegister reg(MyFactory);