Update SkMergeImageFilter to sk_sp

src/effects/SkMatrixConvolutionImageFilter.cpp

Index: src/effects/SkMatrixConvolutionImageFilter.cpp
diff --git a/src/effects/SkMatrixConvolutionImageFilter.cpp b/src/effects/SkMatrixConvolutionImageFilter.cpp
index 7a25f5f7ebc3105cfec7c5e8c39977d40b7db2b5..c8b43bbfd0de8a34b8a232ec8bc5c296c79490f2 100644
--- a/src/effects/SkMatrixConvolutionImageFilter.cpp
+++ b/src/effects/SkMatrixConvolutionImageFilter.cpp
@@ -97,7 +97,7 @@ SkFlattenable* SkMatrixConvolutionImageFilter::CreateProc(SkReadBuffer& buffer)
     TileMode tileMode = (TileMode)buffer.readInt();
     bool convolveAlpha = buffer.readBool();
     return Create(kernelSize, kernel.get(), gain, bias, kernelOffset, tileMode, convolveAlpha,
-                  common.getInput(0), &common.cropRect());
+                  common.getInput(0).get(), &common.cropRect());
 }
 
 void SkMatrixConvolutionImageFilter::flatten(SkWriteBuffer& buffer) const {