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 1a1cb9079ddfd5fd847b831f674572c88ddaf56e..a4b1d55dcc27defebc98c958a9bf75bece51bd3a 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);
     Vector<InsertionPoint*, 8> insertionPoints;