Oilpan: fix build after r353261, part 2.

third_party/WebKit/Source/core/html/HTMLAnchorElement.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Simon Hausmann <hausmann@kde.org>
  * Copyright (C) 2007, 2008, 2009, 2010 Apple 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.
@@ skipping 41 matching lines @@
     RelationNoReferrer     = 0x00001000,
 //     RelationPrev        = 0x00002000,
 //     RelationSearch      = 0x00004000,
 //     RelationSidebar     = 0x00008000,
 //     RelationTag         = 0x00010000,
 //     RelationUp          = 0x00020000,
 };
 
 class CORE_EXPORT HTMLAnchorElement : public HTMLElement, public DOMURLUtils, public DOMSettableTokenListObserver {
     DEFINE_WRAPPERTYPEINFO();
+    WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(HTMLAnchorElement);
 public:
-    DECLARE_VIRTUAL_TRACE();
     static PassRefPtrWillBeRawPtr<HTMLAnchorElement> create(Document&);
 
     ~HTMLAnchorElement() override;
 
     KURL href() const;
     void setHref(const AtomicString&);
 
     const AtomicString& name() const;
 
     KURL url() const final;
     void setURL(const KURL&) final;
 
     String input() const final;
     void setInput(const String&) final;
 
     bool isLiveLink() const final;
 
     bool willRespondToMouseClickEvents() final;
 
     bool hasRel(uint32_t relation) const;
     void setRel(const AtomicString&);
 
     LinkHash visitedLinkHash() const;
     void invalidateCachedVisitedLinkHash() { m_cachedVisitedLinkHash = 0; }
 
     void sendPings(const KURL& destinationURL) const;
 
     DOMSettableTokenList* ping();
 
+    DECLARE_VIRTUAL_TRACE();
+
 protected:
     HTMLAnchorElement(const QualifiedName&, Document&);
 
     void attributeWillChange(const QualifiedName&, const AtomicString& oldValue, const AtomicString& newValue) override;
     void parseAttribute(const QualifiedName&, const AtomicString&) override;
     bool supportsFocus() const override;
 
 private:
     bool shouldHaveFocusAppearance() const final;
     void dispatchFocusEvent(Element* oldFocusedElement, WebFocusType, InputDeviceCapabilities* sourceCapabilities) override;
@@ skipping 29 matching lines @@
 }
 
 // Functions shared with the other anchor elements (i.e., SVG).
 
 bool isEnterKeyKeydownEvent(Event*);
 bool isLinkClick(Event*);
 
 } // namespace blink
 
 #endif // HTMLAnchorElement_h