use new skia imagefilter-ctm handling

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

Index: third_party/WebKit/Source/platform/graphics/filters/SkiaImageFilterBuilder.cpp
diff --git a/third_party/WebKit/Source/platform/graphics/filters/SkiaImageFilterBuilder.cpp b/third_party/WebKit/Source/platform/graphics/filters/SkiaImageFilterBuilder.cpp
index ace6f896383c0d169b0e43f44c6b30ee09387352..5776e8ef8e06c20e9626c15a366925f30437b14d 100644
--- a/third_party/WebKit/Source/platform/graphics/filters/SkiaImageFilterBuilder.cpp
+++ b/third_party/WebKit/Source/platform/graphics/filters/SkiaImageFilterBuilder.cpp
@@ -177,11 +177,6 @@ void buildFilterOperations(const FilterOperations& operations, CompositorFilterO
     }
 }
 
-sk_sp<SkImageFilter> buildTransform(const AffineTransform& transform, sk_sp<SkImageFilter> input)
-{
-    return SkImageFilter::MakeMatrixFilter(affineTransformToSkMatrix(transform), kHigh_SkFilterQuality, std::move(input));
-}
-
 sk_sp<SkImageFilter> buildBoxReflectFilter(const BoxReflection& reflection, sk_sp<SkImageFilter> input)
 {
     sk_sp<SkImageFilter> maskedInput;