Fix bad cast to XPath::Filter in XPathGrammar.y

Source/core/xml/XPathPath.h

 /*
  * Copyright (C) 2005 Frerich Raabe <raabe@kde.org>
  * Copyright (C) 2006, 2009 Apple 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 19 matching lines @@
 #include "core/xml/XPathExpressionNode.h"
 #include "core/xml/XPathNodeSet.h"
 
 namespace WebCore {
 
     namespace XPath {
 
         class Predicate;
         class Step;
 
-        class Filter : public Expression {
+        class Filter FINAL : public Expression {
         public:
             Filter(PassOwnPtr<Expression>, Vector<OwnPtr<Predicate> >&);
             virtual ~Filter();
 
-            virtual Value evaluate() const;
+            virtual Value evaluate() const OVERRIDE;
 
         private:
-            virtual Value::Type resultType() const { return Value::NodeSetValue; }
+            virtual Value::Type resultType() const OVERRIDE { return Value::NodeSetValue; }
 
             OwnPtr<Expression> m_expr;
             Vector<OwnPtr<Predicate> > m_predicates;
         };
 
-        class LocationPath : public Expression {
+        class LocationPath FINAL : public Expression {
         public:
             LocationPath();
             virtual ~LocationPath();
             void setAbsolute(bool value) { m_absolute = value; setIsContextNodeSensitive(!m_absolute); }
 
-            virtual Value evaluate() const;
+            virtual Value evaluate() const OVERRIDE;
             void evaluate(NodeSet& nodes) const; // nodes is an input/output parameter
 
             void appendStep(Step* step);
             void insertFirstStep(Step* step);
 
         private:
-            virtual Value::Type resultType() const { return Value::NodeSetValue; }
+            virtual Value::Type resultType() const OVERRIDE { return Value::NodeSetValue; }
 
             Vector<Step*> m_steps;
             bool m_absolute;
         };
 
-        class Path : public Expression {
+        class Path FINAL : public Expression {
         public:
-            Path(Filter*, LocationPath*);
+            Path(Expression*, LocationPath*);
             virtual ~Path();
 
-            virtual Value evaluate() const;
+            virtual Value evaluate() const OVERRIDE;
 
         private:
-            virtual Value::Type resultType() const { return Value::NodeSetValue; }
+            virtual Value::Type resultType() const OVERRIDE { return Value::NodeSetValue; }
 
-            Filter* m_filter;
+            Expression* m_filter;
             LocationPath* m_path;
         };
 
     }
 }
 
 #endif // XPath_Path_H