[oilpan] Make the oilpan branch build on Mac.

Source/core/dom/ContainerNode.h

Index: Source/core/dom/ContainerNode.h
diff --git a/Source/core/dom/ContainerNode.h b/Source/core/dom/ContainerNode.h
index cc9cbacaef804decb300f12ba772f90cd2940cb3..7c8a173c1df16303f82ff92b39be8a1cf471b629 100644
--- a/Source/core/dom/ContainerNode.h
+++ b/Source/core/dom/ContainerNode.h
@@ -182,8 +182,6 @@ inline Result<ContainerNode> toContainerNode(const Handle<Node>& node)
 
 inline ContainerNode::ContainerNode(const Handle<Document>& document, ConstructionType type)
     : Node(document, type)
-    , m_firstChild(0)
-    , m_lastChild(0)
 {
 }
 
@@ -286,7 +284,6 @@ inline void getChildNodes(Node* node, NodeVector& nodes)
 
 class ChildNodesLazySnapshot {
     WTF_MAKE_NONCOPYABLE(ChildNodesLazySnapshot);
-    WTF_MAKE_FAST_ALLOCATED;
     DISALLOW_ALLOCATION()
 public:
     explicit ChildNodesLazySnapshot(const Handle<Node>& parentNode)