Move LayoutObject to satellite NodeLayoutData that hangs from a Node.

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

Index: third_party/WebKit/Source/core/dom/NodeRareData.h
diff --git a/third_party/WebKit/Source/core/dom/NodeRareData.h b/third_party/WebKit/Source/core/dom/NodeRareData.h
index c560075c0b854c1226aadf83189c8162ebf416e1..80cbec54c8c9654cc726272611443cb2b5b2fde7 100644
--- a/third_party/WebKit/Source/core/dom/NodeRareData.h
+++ b/third_party/WebKit/Source/core/dom/NodeRareData.h
@@ -98,8 +98,8 @@ class NodeRareData : public GarbageCollectedFinalized<NodeRareData>,
   WTF_MAKE_NONCOPYABLE(NodeRareData);
 
  public:
-  static NodeRareData* Create(LayoutObject* layout_object) {
-    return new NodeRareData(layout_object);
+  static NodeRareData* Create() {
+    return new NodeRareData();
   }
 
   void ClearNodeLists() { node_lists_.Clear(); }
@@ -163,9 +163,8 @@ class NodeRareData : public GarbageCollectedFinalized<NodeRareData>,
   DECLARE_TRACE_WRAPPERS_AFTER_DISPATCH();
 
  protected:
-  explicit NodeRareData(LayoutObject* layout_object)
-      : NodeRareDataBase(layout_object),
-        connected_frame_count_(0),
+  explicit NodeRareData()
+      : connected_frame_count_(0),
         element_flags_(0),
         restyle_flags_(0),
         is_element_rare_data_(false) {}