Make TreeScope::baseURL pure virtual

Source/core/dom/Document.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
@@ skipping 514 matching lines @@
     void write(const String& text, Document* ownerDocument = 0);
     void writeln(const String& text, Document* ownerDocument = 0);
 
     bool wellFormed() const { return m_wellFormed; }
 
     const KURL& url() const { return m_url; }
     void setURL(const KURL&);
 
     // To understand how these concepts relate to one another, please see the
     // comments surrounding their declaration.
+    virtual const KURL& baseURL() const OVERRIDE FINAL { return m_baseURL; }
     void setBaseURLOverride(const KURL&);
     const KURL& baseURLOverride() const { return m_baseURLOverride; }
     const KURL& baseElementURL() const { return m_baseElementURL; }
     const AtomicString& baseTarget() const { return m_baseTarget; }
     void processBaseElement();
 
     using TreeScope::completeURL; // Disambiguate between ExecutionContext and TreeScope methods.
     KURL completeURLWithOverride(const String&, const KURL& baseURLOverride) const;
 
     virtual String userAgent(const KURL&) const OVERRIDE FINAL;
@@ skipping 566 matching lines @@
 
     RefPtr<ResourceFetcher> m_fetcher;
     RefPtr<DocumentParser> m_parser;
     unsigned m_activeParserCount;
     RefPtr<ContextFeatures> m_contextFeatures;
 
     bool m_wellFormed;
 
     // Document URLs.
     KURL m_url; // Document.URL: The URL from which this document was retrieved.
-    KURL m_baseURLOverride; // An alternative base URL that takes precedence over TreeScope::baseURL() (but not m_baseElementURL).
+    KURL m_baseURL; // Node.baseURI: The URL to use when resolving relative URLs.
+    KURL m_baseURLOverride; // An alternative base URL that takes precedence over m_baseURL (but not m_baseElementURL).
     KURL m_baseElementURL; // The URL set by the <base> element.
     KURL m_cookieURL; // The URL to use for cookie access.
 
     AtomicString m_baseTarget;
 
     RefPtr<DocumentType> m_docType;
     OwnPtr<DOMImplementation> m_implementation;
 
     RefPtr<CSSStyleSheet> m_elemSheet;
 
@@ skipping 212 matching lines @@
 inline bool Node::isDocumentNode() const
 {
     return this == document();
 }
 
 Node* eventTargetNodeForDocument(Document*);
 
 } // namespace WebCore
 
 #endif // Document_h