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

Source/platform/graphics/filters/Filter.h

 /*
  * Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 22 matching lines @@
 class SourceGraphic;
 class FilterEffect;
 
 class PLATFORM_EXPORT Filter final : public RefCountedWillBeGarbageCollectedFinalized<Filter> {
 public:
     enum UnitScaling {
         UserSpace,
         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();
     DECLARE_TRACE();
 
     float scale() const { return m_scale; }
     FloatRect mapLocalRectToAbsoluteRect(const FloatRect&) const;
     FloatRect mapAbsoluteRectToLocalRect(const FloatRect&) const;
 
     float applyHorizontalScale(float value) const;
@@ skipping 19 matching lines @@
     float m_scale;
     UnitScaling m_unitScaling;
 
     RefPtrWillBeMember<SourceGraphic> m_sourceGraphic;
     RefPtrWillBeMember<FilterEffect> m_lastEffect;
 };
 
 } // namespace blink
 
 #endif // Filter_h