Update SkXfermodeImageFilter to sk_sp

TBR=reed@google.com

GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1852123002

Committed: https://skia.googlesource.com/skia/+/3bc969264d4720d67f0b137552b3777a03b431a8

Review URL: https://codereview.chromium.org/1852123002
diff --git a/samplecode/SampleFilterFuzz.cpp b/samplecode/SampleFilterFuzz.cpp
index 2be6c31..31cd661 100644
--- a/samplecode/SampleFilterFuzz.cpp
+++ b/samplecode/SampleFilterFuzz.cpp
@@ -588,15 +588,12 @@
     case DOWN_SAMPLE:
         filter = sk_sp<SkImageFilter>(SkDownSampleImageFilter::Create(make_scalar()));
         break;
-    case XFERMODE: {
-        sk_sp<SkImageFilter> subFilter1(make_image_filter());
-        sk_sp<SkImageFilter> subFilter2(make_image_filter());
+    case XFERMODE:
         filter = SkXfermodeImageFilter::Make(SkXfermode::Make(make_xfermode()),
-                                             subFilter1.get(),
-                                             subFilter2.get(),
+                                             make_image_filter(),
+                                             make_image_filter(),
                                              nullptr);
         break;
-    }
     case OFFSET:
         filter = SkOffsetImageFilter::Make(make_scalar(), make_scalar(), make_image_filter());
         break;