Oilpan: Reapply: Remove all the RefPtrs and most of the raw pointers to style

Source/core/dom/StyleElement.cpp

 /*
  * Copyright (C) 2006, 2007 Rob Buis
  * Copyright (C) 2008 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.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 58 matching lines @@
 void StyleElement::removedFromDocument(Document& document, Element* element)
 {
     removedFromDocument(document, element, 0, document);
 }
 
 void StyleElement::removedFromDocument(Document& document, Element* element, ContainerNode* scopingNode, TreeScope& treeScope)
 {
     ASSERT(element);
     document.styleEngine()->removeStyleSheetCandidateNode(element, scopingNode, treeScope);
 
-    RefPtr<StyleSheet> removedSheet = m_sheet;
+    RefPtrWillBeRawPtr<StyleSheet> removedSheet = m_sheet.get();
 
     if (m_sheet)
         clearSheet(element);
 
     document.removedStyleSheet(removedSheet.get(), RecalcStyleDeferred, AnalyzedStyleUpdate);
 }
 
 void StyleElement::clearDocumentData(Document& document, Element* element)
 {
     if (m_sheet)
@@ skipping 83 matching lines @@
     document.styleEngine()->removePendingSheet(m_sheet->ownerNode());
     return true;
 }
 
 void StyleElement::startLoadingDynamicSheet(Document& document)
 {
     document.styleEngine()->addPendingSheet();
 }
 
 }