1 files changed, 1 insertions, 11 deletions
diff --git a/dom/base/nsContentUtils.cpp b/dom/base/nsContentUtils.cpp
index 62be71b4a..502c40977 100644
--- a/dom/base/nsContentUtils.cpp
+++ b/dom/base/nsContentUtils.cpp
@@ -4955,17 +4955,7 @@ nsContentUtils::IsInSameAnonymousTree(const nsINode* aNode,
     return aContent->GetBindingParent() == nullptr;
   }
 
-  const nsIContent* nodeAsContent = static_cast<const nsIContent*>(aNode);
-
-  // For nodes in a shadow tree, it is insufficient to simply compare
-  // the binding parent because a node may host multiple ShadowRoots,
-  // thus nodes in different shadow tree may have the same binding parent.
-  if (aNode->IsInShadowTree()) {
-    return nodeAsContent->GetContainingShadow() ==
-      aContent->GetContainingShadow();
-  }
-
-  return nodeAsContent->GetBindingParent() == aContent->GetBindingParent();
+  return aNode->AsContent()->GetBindingParent() == aContent->GetBindingParent();
 }
 
 class AnonymousContentDestroyer : public Runnable {