Scale objectBoundingBox units for primitive dimensions w/ -webkit-filter

Source/platform/graphics/filters/Filter.h

Index: Source/platform/graphics/filters/Filter.h
diff --git a/Source/platform/graphics/filters/Filter.h b/Source/platform/graphics/filters/Filter.h
index ab961de09df4bd0fe51cba524c2266a237069203..a89510d7a13cf58d046a2c2cee009965f54e9eb4 100644
--- a/Source/platform/graphics/filters/Filter.h
+++ b/Source/platform/graphics/filters/Filter.h
@@ -40,7 +40,7 @@ public:
         BoundingBox
     };
 
-    static PassRefPtrWillBeRawPtr<Filter> create(const FloatRect& referenceBox, const FloatRect& filterRegion, float scale, UnitScaling = UserSpace);
+    static PassRefPtrWillBeRawPtr<Filter> create(const FloatRect& referenceBox, const FloatRect& filterRegion, float scale, UnitScaling);
     static PassRefPtrWillBeRawPtr<Filter> create(float scale);
 
     ~Filter();