Fix style erros in XPath-related files.

Source/core/xml/XPathVariableReference.h

 /*
  * Copyright 2005 Frerich Raabe <raabe@kde.org>
  *
  * 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.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 12 matching lines @@
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef XPathVariableReference_h
 #define XPathVariableReference_h
 
 #include "core/xml/XPathExpressionNode.h"
 
 namespace WebCore {
 
-    namespace XPath {
+namespace XPath {
 
-        // Variable references are not used with XPathEvaluator.
-        class VariableReference FINAL : public Expression {
-        public:
-            explicit VariableReference(const String& name);
-        private:
-            virtual Value evaluate() const OVERRIDE;
-            virtual Value::Type resultType() const OVERRIDE { ASSERT_NOT_REACHED(); return Value::NumberValue; }
-            String m_name;
-        };
+// Variable references are not used with XPathEvaluator.
+class VariableReference FINAL : public Expression {
+public:
+    explicit VariableReference(const String& name);
 
-    }
+private:
+    virtual Value evaluate() const OVERRIDE;
+    virtual Value::Type resultType() const OVERRIDE { ASSERT_NOT_REACHED(); return Value::NumberValue; }
+
+    String m_name;
+};
+
 }
 
-#endif // XPath_VariableReference_H
+}
+#endif // XPathVariableReference_h