Bug 1309147 - Part 4: Add CEReactions for CustomElementRegistry.

Tag UXP Issue #1344

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;

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);

dom/webidl/CustomElementRegistry.webidl

@@ -5,7 +5,7 @@
 // https://html.spec.whatwg.org/#dom-window-customelements
 [Func="CustomElementRegistry::IsCustomElementEnabled"]
 interface CustomElementRegistry {
-  [Throws]
+  [CEReactions, Throws]
   void define(DOMString name, Function functionConstructor,
               optional ElementDefinitionOptions options);
   any get(DOMString name);