Fix style erros in XPath-related files.

Source/core/xml/XPathUtil.h

 /*
  * Copyright 2005 Frerich Raabe <raabe@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 14 matching lines @@
  */
 
 #ifndef XPathUtil_h
 #define XPathUtil_h
 
 #include "wtf/Forward.h"
 #include "wtf/Vector.h"
 
 namespace WebCore {
 
-    class Node;
+class Node;
 
-    namespace XPath {
+namespace XPath {
 
-        /* @return whether the given node is the root node */
-        bool isRootDomNode(Node*);
+// @return whether the given node is the root node
+bool isRootDomNode(Node*);
 
-        /* @return the 'string-value' of the given node as specified by http://www.w3.org/TR/xpath */
-        String stringValue(Node*);
+// @return the 'string-value' of the given node as specified by http://www.w3.org/TR/xpath
+String stringValue(Node*);
 
-        /* @return whether the given node is a valid context node */
-        bool isValidContextNode(Node*);
-
-    }
+// @return whether the given node is a valid context node
+bool isValidContextNode(Node*);
 
 }
 
-#endif // XPath_Util_H
+}
+#endif // XPathUtil_h