Oilpan: move LiveNodeList collections to the heap.

Source/core/dom/LiveNodeListBase.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, 2006, 2007 Apple Inc. All rights reserved.
  * Copyright (C) 2014 Samsung Electronics. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 13 matching lines @@
 
 #ifndef LiveNodeListBase_h
 #define LiveNodeListBase_h
 
 #include "HTMLNames.h"
 #include "core/dom/Document.h"
 #include "core/dom/Element.h"
 #include "core/dom/ElementTraversal.h"
 #include "core/dom/NodeTraversal.h"
 #include "core/html/CollectionType.h"
+#include "platform/heap/Handle.h"
 
 namespace WebCore {
 
 enum NodeListRootType {
     NodeListIsRootedAtNode,
     NodeListIsRootedAtDocument
 };
 
-class LiveNodeListBase {
+class LiveNodeListBase : public WillBeGarbageCollectedMixin {
 public:
     LiveNodeListBase(ContainerNode& ownerNode, NodeListRootType rootType, NodeListInvalidationType invalidationType,
         CollectionType collectionType)
         : m_ownerNode(ownerNode)
         , m_rootType(rootType)
         , m_invalidationType(invalidationType)
         , m_collectionType(collectionType)
     {
         ASSERT(m_rootType == static_cast<unsigned>(rootType));
         ASSERT(m_invalidationType == static_cast<unsigned>(invalidationType));
         ASSERT(m_collectionType == static_cast<unsigned>(collectionType));
 
         document().registerNodeList(this);
     }
 
     virtual ~LiveNodeListBase()
     {
+#if !ENABLE(OILPAN)
         document().unregisterNodeList(this);
+#endif
     }
 
     ContainerNode& rootNode() const;
 
     void didMoveToDocument(Document& oldDocument, Document& newDocument);
     ALWAYS_INLINE bool isRootedAtDocument() const { return m_rootType == NodeListIsRootedAtDocument; }
     ALWAYS_INLINE NodeListInvalidationType invalidationType() const { return static_cast<NodeListInvalidationType>(m_invalidationType); }
     ALWAYS_INLINE CollectionType type() const { return static_cast<CollectionType>(m_collectionType); }
     ContainerNode& ownerNode() const { return *m_ownerNode; }
 
@@ skipping 13 matching lines @@
     static Element* lastMatchingElement(const NodeListType&);
     template <class NodeListType>
     static Element* nextMatchingElement(const NodeListType&, Element& current);
     template <class NodeListType>
     static Element* previousMatchingElement(const NodeListType&, Element& current);
     template <class NodeListType>
     static Element* traverseMatchingElementsForwardToOffset(const NodeListType&, unsigned offset, Element& currentElement, unsigned& currentOffset);
     template <class NodeListType>
     static Element* traverseMatchingElementsBackwardToOffset(const NodeListType&, unsigned offset, Element& currentElement, unsigned& currentOffset);
 
+    void trace(Visitor* visitor) { visitor->trace(m_ownerNode); }
+
 private:
-    RefPtr<ContainerNode> m_ownerNode; // Cannot be null.
+    RefPtrWillBeMember<ContainerNode> m_ownerNode; // Cannot be null.
     const unsigned m_rootType : 1;
     const unsigned m_invalidationType : 4;
     const unsigned m_collectionType : 5;
 };
 
 ALWAYS_INLINE bool LiveNodeListBase::shouldInvalidateTypeOnAttributeChange(NodeListInvalidationType type, const QualifiedName& attrName)
 {
     switch (type) {
     case InvalidateOnClassAttrChange:
         return attrName == HTMLNames::classAttr;
@@ skipping 78 matching lines @@
     while ((previous = previousMatchingElement(nodeList, *previous))) {
         if (--currentOffset == offset)
             return previous;
     }
     return 0;
 }
 
 } // namespace WebCore
 
 #endif // LiveNodeListBase_h