2 files changed, 1 insertions, 9 deletions
diff --git a/dom/base/CustomElementRegistry.cpp b/dom/base/CustomElementRegistry.cpp
index d8ca7ade2..b50a1345e 100644
--- a/dom/base/CustomElementRegistry.cpp
+++ b/dom/base/CustomElementRegistry.cpp
@@ -547,15 +547,6 @@ CustomElementRegistry::Define(const nsAString& aName,
                               const ElementDefinitionOptions& aOptions,
                               ErrorResult& aRv)
 {
-  // We do this for [CEReaction] temporarily and it will be removed
-  // after webidl supports [CEReaction] annotation in bug 1309147.
-  DocGroup* docGroup = mWindow->GetDocGroup();
-  if (!docGroup) {
-    aRv.Throw(NS_ERROR_UNEXPECTED);
-    return;
-  }
-
-  AutoCEReaction ceReaction(docGroup->CustomElementReactionsStack());
   aRv.MightThrowJSException();
 
   AutoJSAPI jsapi;
diff --git a/dom/base/nsDocument.cpp b/dom/base/nsDocument.cpp
index 3faa39ab3..dc12d8fb1 100644
--- a/dom/base/nsDocument.cpp
+++ b/dom/base/nsDocument.cpp
@@ -5770,6 +5770,7 @@ nsDocument::RegisterElement(JSContext* aCx, const nsAString& aType,
     return;
   }
 
+  AutoCEReaction ceReaction(this->GetDocGroup()->CustomElementReactionsStack());
   // Unconditionally convert TYPE to lowercase.
   nsAutoString lcType;
   nsContentUtils::ASCIIToLower(aType, lcType);