Update SkXfermodeImageFilter to sk_sp

tests/SerializationTest.cpp

Index: tests/SerializationTest.cpp
diff --git a/tests/SerializationTest.cpp b/tests/SerializationTest.cpp
index 15b73827ae2780470940a565100f8fe6ecab9380..9bdfe1e0e622e9af6b20f026481af48b3ff8f321 100644
--- a/tests/SerializationTest.cpp
+++ b/tests/SerializationTest.cpp
@@ -248,7 +248,8 @@ static void TestBitmapSerialization(const SkBitmap& validBitmap,
     sk_sp<SkImageFilter> invalidBitmapSource(SkImageSource::Make(std::move(invalidImage)));
     sk_sp<SkImageFilter> xfermodeImageFilter(
         SkXfermodeImageFilter::Make(SkXfermode::Make(SkXfermode::kSrcOver_Mode),
-                                    invalidBitmapSource.get(), validBitmapSource.get(), nullptr));
+                                    std::move(invalidBitmapSource),
+                                    std::move(validBitmapSource), nullptr));
 
     SkAutoTUnref<SkImageFilter> deserializedFilter(
         TestFlattenableSerialization<SkImageFilter>(