Oilpan: have xml/ objects on the heap by default.

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 32 matching lines @@
     explicit EvaluationContext(Node&);
 
     RefPtrWillBeMember<Node> node;
     unsigned long size;
     unsigned long position;
     HashMap<String, String> variableBindings;
 
     bool hadTypeConversionError;
 };
 
-class ParseNode : public NoBaseWillBeGarbageCollectedFinalized<ParseNode> {
+class ParseNode : public GarbageCollectedFinalized<ParseNode> {
 public:
     virtual ~ParseNode() { }
     DEFINE_INLINE_VIRTUAL_TRACE() { }
 };
 
 class Expression : public ParseNode {
-    WTF_MAKE_NONCOPYABLE(Expression); WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED(Expression);
+    WTF_MAKE_NONCOPYABLE(Expression);
 public:
     Expression();
     virtual ~Expression();
     DECLARE_VIRTUAL_TRACE();
 
     virtual Value evaluate(EvaluationContext&) const = 0;
 
-    void addSubExpression(PassOwnPtrWillBeRawPtr<Expression> expr)
+    void addSubExpression(Expression* expr)
     {
         m_isContextNodeSensitive |= expr->m_isContextNodeSensitive;
         m_isContextPositionSensitive |= expr->m_isContextPositionSensitive;
         m_isContextSizeSensitive |= expr->m_isContextSizeSensitive;
         m_subExpressions.append(expr);
     }
 
     bool isContextNodeSensitive() const { return m_isContextNodeSensitive; }
     bool isContextPositionSensitive() const { return m_isContextPositionSensitive; }
     bool isContextSizeSensitive() const { return m_isContextSizeSensitive; }
     void setIsContextNodeSensitive(bool value) { m_isContextNodeSensitive = value; }
     void setIsContextPositionSensitive(bool value) { m_isContextPositionSensitive = value; }
     void setIsContextSizeSensitive(bool value) { m_isContextSizeSensitive = value; }
 
     virtual Value::Type resultType() const = 0;
 
 protected:
     unsigned subExprCount() const { return m_subExpressions.size(); }
     Expression* subExpr(unsigned i) { return m_subExpressions[i].get(); }
     const Expression* subExpr(unsigned i) const { return m_subExpressions[i].get(); }
 
 private:
-    WillBeHeapVector<OwnPtrWillBeMember<Expression>> m_subExpressions;
+    HeapVector<Member<Expression>> m_subExpressions;
 
     // Evaluation details that can be used for optimization.
     bool m_isContextNodeSensitive;
     bool m_isContextPositionSensitive;
     bool m_isContextSizeSensitive;
 };
 
-}
+} // namespace XPath
 
-}
+} // namespace blink
 
 #endif // XPathExpressionNode_h