use simpler api for SkMergeImageFilter

third_party/WebKit/Source/platform/graphics/filters/FEMerge.cpp

Index: third_party/WebKit/Source/platform/graphics/filters/FEMerge.cpp
diff --git a/third_party/WebKit/Source/platform/graphics/filters/FEMerge.cpp b/third_party/WebKit/Source/platform/graphics/filters/FEMerge.cpp
index 26c43b46f82ae05c0668dd06abad00f55de93e9a..a02da66131a90aada75e5f9d649cbc0ce1f04c1d 100644
--- a/third_party/WebKit/Source/platform/graphics/filters/FEMerge.cpp
+++ b/third_party/WebKit/Source/platform/graphics/filters/FEMerge.cpp
@@ -46,7 +46,7 @@ sk_sp<SkImageFilter> FEMerge::CreateImageFilter() {
         InputEffect(i), OperatingInterpolationSpace());
   }
   SkImageFilter::CropRect rect = GetCropRect();
-  return SkMergeImageFilter::MakeN(input_refs.get(), size, nullptr, &rect);
+  return SkMergeImageFilter::Make(input_refs.get(), size, &rect);
 }
 
 TextStream& FEMerge::ExternalRepresentation(TextStream& ts, int indent) const {