Fix style erros in XPath-related files.

Source/core/xml/XPathParser.h

 /*
  * Copyright 2005 Maksim Orlovich <maksim@kde.org>
  * Copyright (C) 2006 Apple Computer, Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
@@ skipping 13 matching lines @@
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef XPathParser_h
 #define XPathParser_h
 
 #include "core/xml/XPathPredicate.h"
 #include "core/xml/XPathStep.h"
 
 namespace WebCore {
-namespace XPath {
-class Parser;
-}
-}
-int xpathyyparse(WebCore::XPath::Parser*);
-
-namespace WebCore {
 
 class ExceptionState;
 class XPathNSResolver;
 
 namespace XPath {
 
 class Expression;
+class LocationPath;
 class ParseNode;
+class Parser;
 class Predicate;
 
 struct Token {
     int type;
     String str;
     Step::Axis axis;
     NumericOp::Opcode numop;
     EqTestOp::Opcode eqop;
 
     Token(int t) : type(t) { }
@@ skipping 66 matching lines @@
 
 #if !ENABLE(OILPAN)
     HashSet<ParseNode*> m_parseNodes;
     HashSet<Vector<OwnPtr<Predicate> >*> m_predicateVectors;
     HashSet<Vector<OwnPtr<Expression> >*> m_expressionVectors;
     HashSet<OwnPtr<Step::NodeTest> > m_nodeTests;
 #endif
     HashSet<OwnPtr<String> > m_strings;
 };
 
-} // XPath
+} // namespace XPath
 
-} // WebCore
+} // namespace WebCore
 
+int xpathyyparse(WebCore::XPath::Parser*);
 #endif