Use an SVGElementProxy in ReferenceClipPathOperation

third_party/WebKit/Source/core/svg/SVGFilterElement.h

Index: third_party/WebKit/Source/core/svg/SVGFilterElement.h
diff --git a/third_party/WebKit/Source/core/svg/SVGFilterElement.h b/third_party/WebKit/Source/core/svg/SVGFilterElement.h
index fb720d229dcec298452e2906019bfa5f2e80773c..d27b61ef7d8f5ca20549d83f0aec63ee57f009b5 100644
--- a/third_party/WebKit/Source/core/svg/SVGFilterElement.h
+++ b/third_party/WebKit/Source/core/svg/SVGFilterElement.h
@@ -34,8 +34,6 @@
 
 namespace blink {
 
-class SVGElementProxySet;
-
 class CORE_EXPORT SVGFilterElement final : public SVGElement,
                                            public SVGURIReference {
   DEFINE_WRAPPERTYPEINFO();
@@ -47,8 +45,6 @@ class CORE_EXPORT SVGFilterElement final : public SVGElement,
 
   ~SVGFilterElement() override;
 
-  SVGElementProxySet& elementProxySet();
-
   SVGAnimatedLength* x() const { return m_x.get(); }
   SVGAnimatedLength* y() const { return m_y.get(); }
   SVGAnimatedLength* width() const { return m_width.get(); }
@@ -78,8 +74,6 @@ class CORE_EXPORT SVGFilterElement final : public SVGElement,
   Member<SVGAnimatedLength> m_height;
   Member<SVGAnimatedEnumeration<SVGUnitTypes::SVGUnitType>> m_filterUnits;
   Member<SVGAnimatedEnumeration<SVGUnitTypes::SVGUnitType>> m_primitiveUnits;
-
-  Member<SVGElementProxySet> m_elementProxySet;
 };
 
 }  // namespace blink