[LayoutNG] Add out-of-flow descendants and offsets to NGPhysicalFragment

third_party/WebKit/Source/core/layout/ng/ng_physical_fragment.h

Index: third_party/WebKit/Source/core/layout/ng/ng_physical_fragment.h
diff --git a/third_party/WebKit/Source/core/layout/ng/ng_physical_fragment.h b/third_party/WebKit/Source/core/layout/ng/ng_physical_fragment.h
index 1c04df1ff0649381d03749ccf171d47703229492..f602483d50aff8f494a9d5aa782b1de2ed8082b2 100644
--- a/third_party/WebKit/Source/core/layout/ng/ng_physical_fragment.h
+++ b/third_party/WebKit/Source/core/layout/ng/ng_physical_fragment.h
@@ -12,25 +12,39 @@
 
 namespace blink {
 
+class NGBox;
+
 class CORE_EXPORT NGPhysicalFragment final : public NGPhysicalFragmentBase {
  public:
   // This modifies the passed-in children vector.
-  NGPhysicalFragment(NGPhysicalSize size,
-                     NGPhysicalSize overflow,
-                     HeapVector<Member<const NGPhysicalFragmentBase>>& children,
-                     NGMarginStrut margin_strut);
+  NGPhysicalFragment(
+      NGPhysicalSize size,
+      NGPhysicalSize overflow,
+      HeapVector<Member<const NGPhysicalFragmentBase>>& children,
+      HeapLinkedHashSet<WeakMember<NGBox>>& out_of_flow_descendants,
+      Vector<NGLogicalOffset> out_of_flow_offsets,
+      NGMarginStrut margin_strut);
 
   const HeapVector<Member<const NGPhysicalFragmentBase>>& Children() const {
     return children_;
   }
 
+  const HeapLinkedHashSet<WeakMember<NGBox>>& OutOfFlowDescendants() const {
+    return out_of_flow_descendants_;
+  }
+
+  const Vector<NGLogicalOffset>& OutOfFlowOffsets() const {
+    return out_of_flow_offsets_;
+  }
+
   NGMarginStrut MarginStrut() const { return margin_strut_; }
 
   DECLARE_TRACE_AFTER_DISPATCH();
 
  private:
   HeapVector<Member<const NGPhysicalFragmentBase>> children_;
-
+  HeapLinkedHashSet<WeakMember<NGBox>> out_of_flow_descendants_;
+  Vector<NGLogicalOffset> out_of_flow_offsets_;
   NGMarginStrut margin_strut_;
 };