Have CharacterData constructor take a Document reference in argument

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 15 matching lines @@
 #include "core/fetch/ResourcePtr.h"
 #include "core/fetch/StyleSheetResourceClient.h"
 
 namespace WebCore {
 
 class StyleSheet;
 class CSSStyleSheet;
 
 class ProcessingInstruction FINAL : public CharacterData, private StyleSheetResourceClient {
 public:
-    static PassRefPtr<ProcessingInstruction> create(Document*, const String& target, const String& data);
+    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; }
 
     virtual void finishParsingChildren();
 
     const String& localHref() const { return m_localHref; }
     StyleSheet* sheet() const { return m_sheet.get(); }
     void setCSSStyleSheet(PassRefPtr<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);
+    ProcessingInstruction(Document&, const String& target, const String& data);
 
     virtual String nodeName() const;
     virtual NodeType nodeType() const;
     virtual PassRefPtr<Node> cloneNode(bool deep = true);
 
     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*);
@@ skipping 20 matching lines @@
 
 inline ProcessingInstruction* toProcessingInstruction(Node* node)
 {
     ASSERT_WITH_SECURITY_IMPLICATION(!node || node->nodeType() == Node::PROCESSING_INSTRUCTION_NODE);
     return static_cast<ProcessingInstruction*>(node);
 }
 
 } //namespace
 
 #endif