Move LayoutObject to satellite NodeLayoutData that hangs from a Node.

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

Index: third_party/WebKit/Source/core/dom/ElementRareData.h
diff --git a/third_party/WebKit/Source/core/dom/ElementRareData.h b/third_party/WebKit/Source/core/dom/ElementRareData.h
index ad4f572f92bb28ac70611aaab76f7acc1157cd71..beda92dbcd1d990e6c709a419fab924c7717514f 100644
--- a/third_party/WebKit/Source/core/dom/ElementRareData.h
+++ b/third_party/WebKit/Source/core/dom/ElementRareData.h
@@ -44,15 +44,15 @@
 
 namespace blink {
 
-class LayoutObject;
+class NodeLayoutData;
 class CompositorProxiedPropertySet;
 class ResizeObservation;
 class ResizeObserver;
 
 class ElementRareData : public NodeRareData {
  public:
-  static ElementRareData* Create(LayoutObject* layout_object) {
-    return new ElementRareData(layout_object);
+  static ElementRareData* Create() {
+    return new ElementRareData();
   }
 
   ~ElementRareData();
@@ -226,7 +226,7 @@ class ElementRareData : public NodeRareData {
 
   Member<AccessibleNode> accessible_node_;
 
-  explicit ElementRareData(LayoutObject*);
+  explicit ElementRareData();
 };
 
 DEFINE_TRAIT_FOR_TRACE_WRAPPERS(ElementRareData);
@@ -235,8 +235,8 @@ inline LayoutSize DefaultMinimumSizeForResizing() {
   return LayoutSize(LayoutUnit::Max(), LayoutUnit::Max());
 }
 
-inline ElementRareData::ElementRareData(LayoutObject* layout_object)
-    : NodeRareData(layout_object),
+inline ElementRareData::ElementRareData()
+    : NodeRareData(), 
       minimum_size_for_resizing_(DefaultMinimumSizeForResizing()),
       class_list_(nullptr) {
   is_element_rare_data_ = true;