Fix style erros in XPath-related files.

Source/core/xml/XPathParser.h

Index: Source/core/xml/XPathParser.h
diff --git a/Source/core/xml/XPathParser.h b/Source/core/xml/XPathParser.h
index 21f0fe2a2a0878a21d371880c6fee45a16189236..0162f0bc104f26b0daa285d789376ffd7623fdf3 100644
--- a/Source/core/xml/XPathParser.h
+++ b/Source/core/xml/XPathParser.h
@@ -31,13 +31,6 @@
 #include "core/xml/XPathStep.h"
 
 namespace WebCore {
-namespace XPath {
-class Parser;
-}
-}
-int xpathyyparse(WebCore::XPath::Parser*);
-
-namespace WebCore {
 
 class ExceptionState;
 class XPathNSResolver;
@@ -45,7 +38,9 @@ class XPathNSResolver;
 namespace XPath {
 
 class Expression;
+class LocationPath;
 class ParseNode;
+class Parser;
 class Predicate;
 
 struct Token {
@@ -132,8 +127,9 @@ private:
     HashSet<OwnPtr<String> > m_strings;
 };
 
-} // XPath
+} // namespace XPath
 
-} // WebCore
+} // namespace WebCore
 
+int xpathyyparse(WebCore::XPath::Parser*);
 #endif