Oilpan: Prepare to make ExecutionContext GarbageCollectedMixin.

Source/core/dom/Document.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
@@ skipping 1115 matching lines @@
     virtual bool isDocument() const OVERRIDE FINAL { return true; }
 
     virtual void childrenChanged(bool changedByParser = false, Node* beforeChange = 0, Node* afterChange = 0, int childCountDelta = 0) OVERRIDE;
 
     virtual String nodeName() const OVERRIDE FINAL;
     virtual NodeType nodeType() const OVERRIDE FINAL;
     virtual bool childTypeAllowed(NodeType) const OVERRIDE FINAL;
     virtual PassRefPtrWillBeRawPtr<Node> cloneNode(bool deep = true) OVERRIDE FINAL;
     void cloneDataFromDocument(const Document&);
 
+#if !ENABLE(OILPAN)
     virtual void refExecutionContext() OVERRIDE FINAL { ref(); }
     virtual void derefExecutionContext() OVERRIDE FINAL { deref(); }
+#endif
 
     virtual const KURL& virtualURL() const OVERRIDE FINAL; // Same as url(), but needed for ExecutionContext to implement it without a performance loss for direct calls.
     virtual KURL virtualCompleteURL(const String&) const OVERRIDE FINAL; // Same as completeURL() for the same reason as above.
 
     virtual void reportBlockedScriptExecutionToInspector(const String& directiveText) OVERRIDE FINAL;
     virtual void addMessage(MessageSource, MessageLevel, const String& message, const String& sourceURL, unsigned lineNumber, ScriptState*) OVERRIDE FINAL;
     void internalAddMessage(MessageSource, MessageLevel, const String& message, const String& sourceURL, unsigned lineNumber, PassRefPtr<ScriptCallStack>, ScriptState*);
 
     virtual double timerAlignmentInterval() const OVERRIDE FINAL;
 
@@ skipping 308 matching lines @@
 inline bool Node::isDocumentNode() const
 {
     return this == document();
 }
 
 Node* eventTargetNodeForDocument(Document*);
 
 } // namespace WebCore
 
 #endif // Document_h