Revert of [Oilpan] Prepare full definition of classes before using Member

third_party/WebKit/Source/core/dom/Node.h

Index: third_party/WebKit/Source/core/dom/Node.h
diff --git a/third_party/WebKit/Source/core/dom/Node.h b/third_party/WebKit/Source/core/dom/Node.h
index 5a83d1bcfb8a1d90fbad5aa70544c78a885aaf50..e7ab471e7bc892deb76006f49abc601c9c3f906a 100644
--- a/third_party/WebKit/Source/core/dom/Node.h
+++ b/third_party/WebKit/Source/core/dom/Node.h
@@ -833,6 +833,12 @@ private:
     } m_data;
 };
 
+inline void Node::setParentOrShadowHostNode(ContainerNode* parent)
+{
+    ASSERT(isMainThread());
+    m_parentOrShadowHostNode = parent;
+}
+
 inline ContainerNode* Node::parentOrShadowHostNode() const
 {
     ASSERT(isMainThread());