Update MatrixConvolutionImageFilter to sk_sp

samplecode/SampleFilterFuzz.cpp

Index: samplecode/SampleFilterFuzz.cpp
diff --git a/samplecode/SampleFilterFuzz.cpp b/samplecode/SampleFilterFuzz.cpp
index a7f4163b27fa9fd4ed1a0346ec82d7afd1154859..f09c6a57a015c4f217f5991a768a72fbe81a5693 100644
--- a/samplecode/SampleFilterFuzz.cpp
+++ b/samplecode/SampleFilterFuzz.cpp
@@ -555,7 +555,7 @@ static sk_sp<SkImageFilter> make_image_filter(bool canBeNull) {
         filter = SkAlphaThresholdFilter::Make(make_region(),
                                               make_scalar(),
                                               make_scalar(),
-                                              nullptr);
+                                              make_image_filter());
         break;
     case MERGE:
         filter = SkMergeImageFilter::Make(make_image_filter(),
@@ -614,18 +614,16 @@ static sk_sp<SkImageFilter> make_image_filter(bool canBeNull) {
         }
         SkIPoint kernelOffset = SkIPoint::Make(R(SkIntToScalar(size.width())),
                                                R(SkIntToScalar(size.height())));
-        sk_sp<SkImageFilter> subFilter(make_image_filter());
 
-        filter = sk_sp<SkImageFilter>(SkMatrixConvolutionImageFilter::Create(
-                                                        size,
-                                                        kernel.begin(),
-                                                        make_scalar(),
-                                                        make_scalar(),
-                                                        kernelOffset,
-                                                        (SkMatrixConvolutionImageFilter::TileMode)R(3),
-                                                        R(2) == 1,
-                                                        subFilter.get(),
-                                                        &cropR));
+        filter = SkMatrixConvolutionImageFilter::Make(size,
+                                                      kernel.begin(),
+                                                      make_scalar(),
+                                                      make_scalar(),
+                                                      kernelOffset,
+                                                      (SkMatrixConvolutionImageFilter::TileMode)R(3),
+                                                      R(2) == 1,
+                                                      make_image_filter(),
+                                                      &cropR);
         break;
     }
     case COMPOSE: