Oilpan: move Node traversal objects to the heap.

Source/core/dom/NodeIteratorBase.cpp

Index: Source/core/dom/NodeIteratorBase.cpp
diff --git a/Source/core/dom/NodeIteratorBase.cpp b/Source/core/dom/NodeIteratorBase.cpp
index db5bf008c23ee9840da69c97da3f4881d99cc33d..8899fc88dce79d403d732b4270ebd5f26c4d274d 100644
--- a/Source/core/dom/NodeIteratorBase.cpp
+++ b/Source/core/dom/NodeIteratorBase.cpp
@@ -31,7 +31,7 @@
 
 namespace WebCore {
 
-NodeIteratorBase::NodeIteratorBase(PassRefPtr<Node> rootNode, unsigned whatToShow, PassRefPtr<NodeFilter> nodeFilter)
+NodeIteratorBase::NodeIteratorBase(PassRefPtrWillBeRawPtr<Node> rootNode, unsigned whatToShow, PassRefPtrWillBeRawPtr<NodeFilter> nodeFilter)
     : m_root(rootNode)
     , m_whatToShow(whatToShow)
     , m_filter(nodeFilter)
@@ -49,4 +49,10 @@ short NodeIteratorBase::acceptNode(Node* node, ExceptionState& exceptionState) c
     return m_filter->acceptNode(node, exceptionState);
 }
 
+void NodeIteratorBase::trace(Visitor* visitor)
+{
+    visitor->trace(m_root);
+    visitor->trace(m_filter);
+}
+
 } // namespace WebCore