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

Source/core/dom/ProcessingInstruction.h

 /*
  * Copyright (C) 2000 Peter Kelly (pmk@post.com)
  * Copyright (C) 2006 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 25 matching lines @@
 public:
     static PassRefPtr<ProcessingInstruction> create(Document&, const String& target, const String& data);
     virtual ~ProcessingInstruction();
 
     const String& target() const { return m_target; }
 
     void setCreatedByParser(bool createdByParser) { m_createdByParser = createdByParser; }
 
     const String& localHref() const { return m_localHref; }
     StyleSheet* sheet() const { return m_sheet.get(); }
-    void setCSSStyleSheet(PassRefPtr<CSSStyleSheet>);
+    void setCSSStyleSheet(PassRefPtrWillBeRawPtr<CSSStyleSheet>);
 
     bool isCSS() const { return m_isCSS; }
     bool isXSL() const { return m_isXSL; }
 
     bool isLoading() const;
 
 private:
     friend class CharacterData;
     ProcessingInstruction(Document&, const String& target, const String& data);
 
     virtual String nodeName() const OVERRIDE;
     virtual NodeType nodeType() const OVERRIDE;
     virtual PassRefPtr<Node> cloneNode(bool deep = true) OVERRIDE;
 
     virtual InsertionNotificationRequest insertedInto(ContainerNode*) OVERRIDE;
     virtual void removedFrom(ContainerNode*) OVERRIDE;
 
     void checkStyleSheet();
     virtual void setCSSStyleSheet(const String& href, const KURL& baseURL, const String& charset, const CSSStyleSheetResource*) OVERRIDE;
     virtual void setXSLStyleSheet(const String& href, const KURL& baseURL, const String& sheet) OVERRIDE;
 
     virtual bool sheetLoaded() OVERRIDE;
 
     void parseStyleSheet(const String& sheet);
 
     String m_target;
     String m_localHref;
     String m_title;
     String m_media;
-    RefPtr<StyleSheet> m_sheet;
+    RefPtrWillBePersistent<StyleSheet> m_sheet;
     bool m_loading;
     bool m_alternate;
     bool m_createdByParser;
     bool m_isCSS;
     bool m_isXSL;
 };
 
 DEFINE_NODE_TYPE_CASTS(ProcessingInstruction, nodeType() == Node::PROCESSING_INSTRUCTION_NODE);
 
 } // namespace WebCore
 
 #endif