InlinedVisitor: Migrate xml to use inlined tracing

Source/core/xml/XPathExpressionNode.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 35 matching lines @@
     unsigned long size;
     unsigned long position;
     HashMap<String, String> variableBindings;
 
     bool hadTypeConversionError;
 };
 
 class ParseNode : public NoBaseWillBeGarbageCollectedFinalized<ParseNode> {
 public:
     virtual ~ParseNode() { }
-    virtual void trace(Visitor*) { }
+    DEFINE_INLINE_VIRTUAL_TRACE() { }
 };
 
 class Expression : public ParseNode {
     WTF_MAKE_NONCOPYABLE(Expression); WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED;
 public:
     Expression();
     virtual ~Expression();
-    virtual void trace(Visitor*) override;
+    DECLARE_VIRTUAL_TRACE();
 
     virtual Value evaluate(EvaluationContext&) const = 0;
 
     void addSubExpression(PassOwnPtrWillBeRawPtr<Expression> expr)
     {
         m_isContextNodeSensitive |= expr->m_isContextNodeSensitive;
         m_isContextPositionSensitive |= expr->m_isContextPositionSensitive;
         m_isContextSizeSensitive |= expr->m_isContextSizeSensitive;
         m_subExpressions.append(expr);
     }
@@ skipping 19 matching lines @@
     bool m_isContextNodeSensitive;
     bool m_isContextPositionSensitive;
     bool m_isContextSizeSensitive;
 };
 
 }
 
 }
 
 #endif // XPathExpressionNode_h