Oilpan: move LiveNodeList collections to the heap.

Source/core/dom/Node.cpp

Index: Source/core/dom/Node.cpp
diff --git a/Source/core/dom/Node.cpp b/Source/core/dom/Node.cpp
index 38bd63b700ea8637540eda36d65b350c19312995..408f788a924d64a5a2a2bfb54184c3ae7af89152 100644
--- a/Source/core/dom/Node.cpp
+++ b/Source/core/dom/Node.cpp
@@ -375,7 +375,7 @@ void Node::setNodeValue(const String&)
     // By default, setting nodeValue has no effect.
 }
 
-PassRefPtr<NodeList> Node::childNodes()
+PassRefPtrWillBeRawPtr<NodeList> Node::childNodes()
 {
     if (isContainerNode())
         return ensureRareData().ensureNodeLists().ensureChildNodeList(toContainerNode(*this));
@@ -2449,7 +2449,7 @@ void Node::updateAncestorConnectedSubframeCountForInsertion() const
         node->incrementConnectedSubframeCount(count);
 }
 
-PassRefPtr<NodeList> Node::getDestinationInsertionPoints()
+PassRefPtrWillBeRawPtr<NodeList> Node::getDestinationInsertionPoints()
 {
     document().updateDistributionForNodeIfNeeded(this);
     WillBeHeapVector<RawPtrWillBeMember<InsertionPoint>, 8> insertionPoints;