Oilpan: Remove guardRef and guardDeref from TreeScope.

Source/core/dom/TreeScopeAdopter.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 14 matching lines @@
 #ifndef TreeScopeAdopter_h
 #define TreeScopeAdopter_h
 
 #include "core/dom/Node.h"
 
 namespace WebCore {
 
 class TreeScope;
 
 class TreeScopeAdopter {
+    STACK_ALLOCATED();
 public:
     TreeScopeAdopter(Node& toAdopt, TreeScope& newScope);
 
     void execute() const { moveTreeToNewScope(m_toAdopt); }
     bool needsScopeChange() const { return m_oldScope != m_newScope; }
 
 #ifdef NDEBUG
     static void ensureDidMoveToNewDocumentWasCalled(Document&) { }
 #else
     static void ensureDidMoveToNewDocumentWasCalled(Document&);
@@ skipping 13 matching lines @@
 inline TreeScopeAdopter::TreeScopeAdopter(Node& toAdopt, TreeScope& newScope)
     : m_toAdopt(toAdopt)
     , m_newScope(newScope)
     , m_oldScope(toAdopt.treeScope())
 {
 }
 
 }
 
 #endif