Refactor SkiaImageFilterBuilder into a namespace.

third_party/WebKit/Source/core/paint/SVGFilterPainter.cpp

Index: third_party/WebKit/Source/core/paint/SVGFilterPainter.cpp
diff --git a/third_party/WebKit/Source/core/paint/SVGFilterPainter.cpp b/third_party/WebKit/Source/core/paint/SVGFilterPainter.cpp
index 69fb4725cd7283240b715a5344422b22ee5792ec..c091c74e3a10b81a62848cc2db190bab3ec4b9d0 100644
--- a/third_party/WebKit/Source/core/paint/SVGFilterPainter.cpp
+++ b/third_party/WebKit/Source/core/paint/SVGFilterPainter.cpp
@@ -66,8 +66,7 @@ static void paintFilteredContent(const LayoutObject& object, GraphicsContext& co
 
     filterData->m_state = FilterData::PaintingFilter;
 
-    SkiaImageFilterBuilder builder;
-    sk_sp<SkImageFilter> imageFilter = builder.build(filterData->filter->lastEffect(), ColorSpaceDeviceRGB);
+    sk_sp<SkImageFilter> imageFilter = SkiaImageFilterBuilder::build(filterData->filter->lastEffect(), ColorSpaceDeviceRGB);
     FloatRect boundaries = filterData->filter->filterRegion();
     context.save();
 
@@ -90,7 +89,7 @@ static void paintFilteredContent(const LayoutObject& object, GraphicsContext& co
         AffineTransform shearAndRotate = scaleAndTranslate.inverse();
         shearAndRotate.multiply(ctm);
         context.concatCTM(shearAndRotate.inverse());
-        imageFilter = builder.buildTransform(shearAndRotate, std::move(imageFilter));
+        imageFilter = SkiaImageFilterBuilder::buildTransform(shearAndRotate, std::move(imageFilter));
     }
 #endif