Fix assignedNodes({flatten:true}) to return fallback content in document tree

third_party/WebKit/Source/core/html/HTMLSlotElement.h

Index: third_party/WebKit/Source/core/html/HTMLSlotElement.h
diff --git a/third_party/WebKit/Source/core/html/HTMLSlotElement.h b/third_party/WebKit/Source/core/html/HTMLSlotElement.h
index dffa5dfc71129c790275aeb7a5c064f444ed8ad9..15034fe29ef4c9bdbd1eed41a500bb0e80ea241a 100644
--- a/third_party/WebKit/Source/core/html/HTMLSlotElement.h
+++ b/third_party/WebKit/Source/core/html/HTMLSlotElement.h
@@ -45,8 +45,7 @@ class CORE_EXPORT HTMLSlotElement final : public HTMLElement {
   DECLARE_NODE_FACTORY(HTMLSlotElement);
 
   const HeapVector<Member<Node>>& AssignedNodes();
-  const HeapVector<Member<Node>>& GetDistributedNodes();
-  const HeapVector<Member<Node>> GetDistributedNodesForBinding();
+  const HeapVector<Member<Node>>& GetDistributedNodesExcludingFallback();
   const HeapVector<Member<Node>> assignedNodesForBinding(
       const AssignedNodesOptions&);
 
@@ -108,6 +107,8 @@ class CORE_EXPORT HTMLSlotElement final : public HTMLElement {
   void RemovedFrom(ContainerNode*) final;
   void WillRecalcStyle(StyleRecalcChange) final;
 
+  const HeapVector<Member<Node>> GetDistributedNodes() const;
+
   void EnqueueSlotChangeEvent();
 
   HeapVector<Member<Node>> assigned_nodes_;