--- a/dom/xbl/nsBindingManager.cpp
+++ b/dom/xbl/nsBindingManager.cpp
@@ -240,24 +240,16 @@ nsBindingManager::ResolveTag(nsIContent*
       return base;
     }
   }
 
   *aNameSpaceID = aContent->GetNameSpaceID();
   return aContent->NodeInfo()->NameAtom();
 }
 
-nsresult
-nsBindingManager::GetAnonymousNodesFor(nsIContent* aContent,
-                                       nsIDOMNodeList** aResult)
-{
-  NS_IF_ADDREF(*aResult = GetAnonymousNodesFor(aContent));
-  return NS_OK;
-}
-
 nsINodeList*
 nsBindingManager::GetAnonymousNodesFor(nsIContent* aContent)
 {
   nsXBLBinding* binding = GetBindingWithContent(aContent);
   return binding ? binding->GetAnonymousNodeList() : nullptr;
 }
 
 nsresult

--- a/dom/xbl/nsBindingManager.h
+++ b/dom/xbl/nsBindingManager.h
@@ -21,17 +21,16 @@
 #include "mozilla/MediaFeatureChange.h"
 #include "mozilla/MemoryReporting.h"
 #include "mozilla/StyleSheet.h"
 #include "mozilla/EventStates.h"
 
 struct ElementDependentRuleProcessorData;
 class nsIXPConnectWrappedJS;
 class nsAtom;
-class nsIDOMNodeList;
 class nsIDocument;
 class nsIURI;
 class nsXBLDocumentInfo;
 class nsIStreamListener;
 class nsXBLBinding;
 typedef nsTArray<RefPtr<nsXBLBinding> > nsBindingList;
 class nsIPrincipal;
 class nsITimer;
@@ -85,17 +84,16 @@ public:
   nsAtom* ResolveTag(nsIContent* aContent, int32_t* aNameSpaceID);
 
   /**
    * Return the nodelist of "anonymous" kids for this node.  This might
    * actually include some of the nodes actual DOM kids, if there are
    * <children> tags directly as kids of <content>.  This will only end up
    * returning a non-null list for nodes which have a binding attached.
    */
-  nsresult GetAnonymousNodesFor(nsIContent* aContent, nsIDOMNodeList** aResult);
   nsINodeList* GetAnonymousNodesFor(nsIContent* aContent);
 
   nsresult ClearBinding(mozilla::dom::Element* aElement);
   nsresult LoadBindingDocument(nsIDocument* aBoundDoc, nsIURI* aURL,
                                nsIPrincipal* aOriginPrincipal);
 
   nsresult AddToAttachedQueue(nsXBLBinding* aBinding);
   void RemoveFromAttachedQueue(nsXBLBinding* aBinding);