Oilpan: fix build after r183913.

Source/core/dom/FirstLetterPseudoElement.cpp

 /*
  * 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 138 matching lines @@
     // No first letter text to display, we're done.
     // FIXME: This black-list of disallowed RenderText subclasses is fragile. crbug.com/422336.
     // Should counter be on this list? What about RenderTextFragment?
     if (!firstLetterTextRenderer || !firstLetterTextRenderer->isText()
         || firstLetterTextRenderer->isBR() || toRenderText(firstLetterTextRenderer)->isWordBreak())
         return nullptr;
 
     return firstLetterTextRenderer;
 }
 
-PassRefPtrWillBeRawPtr<FirstLetterPseudoElement> FirstLetterPseudoElement::create(Element* parent)
-{
-    return adoptRefWillBeNoop(new FirstLetterPseudoElement(parent));
-}
-
 FirstLetterPseudoElement::FirstLetterPseudoElement(Element* parent)
     : PseudoElement(parent, FIRST_LETTER)
     , m_remainingTextRenderer(nullptr)
     , m_needsUpdate(false)
 {
 }
 
+FirstLetterPseudoElement::~FirstLetterPseudoElement()
+{
+}
+
+void FirstLetterPseudoElement::trace(Visitor* visitor)
+{
+    visitor->trace(m_remainingTextRenderer);
+    PseudoElement::trace(visitor);
+}
+
 void FirstLetterPseudoElement::setNeedsUpdate()
 {
     m_needsUpdate = true;
     setNeedsStyleRecalc(LocalStyleChange, StyleChangeReasonForTracing::create(StyleChangeReason::PseudoClass));
 }
 
 void FirstLetterPseudoElement::attach(const AttachContext& context)
 {
     PseudoElement::attach(context);
     attachFirstLetterTextRenderers();
@@ skipping 100 matching lines @@
 
         // We only manage the style for the generated content items.
         if (!child->isText() && !child->isQuote() && !child->isImage())
             continue;
 
         child->setPseudoStyle(renderer->style());
     }
 }
 
 } // namespace blink