Oilpan: move RenderObjects off heap.

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 152 matching lines @@
 FirstLetterPseudoElement::FirstLetterPseudoElement(Element* parent)
     : PseudoElement(parent, FIRST_LETTER)
     , m_remainingTextRenderer(nullptr)
 {
 }
 
 FirstLetterPseudoElement::~FirstLetterPseudoElement()
 {
 }
 
-void FirstLetterPseudoElement::trace(Visitor* visitor)
-{
-    visitor->trace(m_remainingTextRenderer);
-    PseudoElement::trace(visitor);
-}
-
 void FirstLetterPseudoElement::updateTextFragments()
 {
     String oldText =  m_remainingTextRenderer->completeText();
     ASSERT(oldText.impl());
 
     unsigned length = FirstLetterPseudoElement::firstLetterLength(oldText);
     m_remainingTextRenderer->setTextFragment(oldText.impl()->substring(length, oldText.length()), length, oldText.length() - length);
     m_remainingTextRenderer->dirtyLineBoxes();
 
     for (auto child = renderer()->slowFirstChild(); child; child = child->nextSibling()) {
@@ skipping 121 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