Oilpan: fix build after r183913.

Source/core/dom/FirstLetterPseudoElement.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2007 David Smith (catfish.man@gmail.com)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) Research In Motion Limited 2010. 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
@@ skipping 14 matching lines @@
 #define FirstLetterPseudoElement_h
 
 #include "core/dom/Document.h"
 #include "core/dom/PseudoElement.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
 class Element;
 class RenderObject;
+class RenderTextFragment;
 
 class FirstLetterPseudoElement final : public PseudoElement {
-WTF_MAKE_NONCOPYABLE(FirstLetterPseudoElement);
+    WTF_MAKE_NONCOPYABLE(FirstLetterPseudoElement);
 public:
-    static PassRefPtrWillBeRawPtr<FirstLetterPseudoElement> create(Element* parent);
+    static PassRefPtrWillBeRawPtr<FirstLetterPseudoElement> create(Element* parent)
+    {
+        return adoptRefWillBeNoop(new FirstLetterPseudoElement(parent));
+    }
+
+    virtual ~FirstLetterPseudoElement();
+    virtual void trace(Visitor*) override;
 
     static RenderObject* firstLetterTextRenderer(const Element&);
     static unsigned firstLetterLength(const String&);
 
     void setRemainingTextRenderer(RenderTextFragment* fragment) { m_remainingTextRenderer = fragment; }
     RenderTextFragment* remainingTextRenderer() const { return m_remainingTextRenderer; }
 
     void setNeedsUpdate();
     bool needsUpdate() const { return m_needsUpdate; }
 
     virtual void attach(const AttachContext& = AttachContext()) override;
     virtual void detach(const AttachContext& = AttachContext()) override;
 
 private:
-    FirstLetterPseudoElement(Element*);
+    explicit FirstLetterPseudoElement(Element*);
 
     virtual void didRecalcStyle(StyleRecalcChange) override;
 
     void attachFirstLetterTextRenderers();
     RenderStyle* styleForFirstLetter(RenderObject*);
 
-    RenderTextFragment* m_remainingTextRenderer;
+    RawPtrWillBeMember<RenderTextFragment> m_remainingTextRenderer;
     bool m_needsUpdate;
 };
 
 DEFINE_ELEMENT_TYPE_CASTS(FirstLetterPseudoElement, isFirstLetterPseudoElement());
 
 } // namespace blink
 
 #endif // FirstLetterPseudoElement_h