Use an SVGElementProxy in ReferenceClipPathOperation

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

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef SVGElementProxy_h
 #define SVGElementProxy_h
 
 #include "core/fetch/DocumentResource.h"
 #include "platform/heap/Handle.h"
 #include "wtf/text/AtomicString.h"
@@ skipping 97 matching lines @@
   Member<DocumentResource> m_document;
   AtomicString m_id;
   // URL for resolving references to external resource documents. Contains an
   // absolute URL to the resource to load. Cleared when a load has been
   // initiated. Ignored if m_isLocal is true.
   String m_url;
   bool m_isLocal;
 };
 
 // Collection of SVGElementProxys. This is hosted by elements that can be
-// subject to proxies (currently only SVGFilterElement), and is mainly a helper
+// subject to proxies (see SVGElement::elementProxySet), and is mainly a helper
 // for dealing with the many-to-one structure of SVGElementProxy.
 class SVGElementProxySet : public GarbageCollected<SVGElementProxySet> {
  public:
   void add(SVGElementProxy&);
   bool isEmpty() const;
 
   // Notify proxy clients that the (content of the) proxied element has
   // changed.
   void notifyContentChanged(TreeScope&);
 
   DECLARE_TRACE();
 
  private:
   using ProxySet = HeapHashSet<WeakMember<SVGElementProxy>>;
   ProxySet m_elementProxies;
 };
 
 }  // namespace blink
 
 #endif  // SVGElementProxy_h