Bug 839103 - part 2 - enable chrome dispatching of nsIDOMEvents in nsAsyncDOMEvent; r=bz

content/events/src/nsAsyncDOMEvent.cpp

@@ -24,10 +24,26 @@ nsAsyncDOMEvent::nsAsyncDOMEvent(nsINode *aEventNode, nsEvent &aEvent)
 NS_IMETHODIMP nsAsyncDOMEvent::Run()
 {
   if (mEvent) {
-    NS_ASSERTION(!mDispatchChromeOnly, "Can't do that");
-    nsCOMPtr<nsIDOMEventTarget> target = do_QueryInterface(mEventNode);
-    bool defaultActionEnabled; // This is not used because the caller is async
-    target->DispatchEvent(mEvent, &defaultActionEnabled);
+    if (mDispatchChromeOnly) {
+      MOZ_ASSERT(mEvent->InternalDOMEvent()->IsTrusted());
+
+      nsCOMPtr<nsIDocument> ownerDoc = mEventNode->OwnerDoc();
+      nsPIDOMWindow* window = ownerDoc->GetWindow();
+      if (!window) {
+        return NS_ERROR_INVALID_ARG;
+      }
+
+      nsCOMPtr<nsIDOMEventTarget> target = window->GetParentTarget();
+      if (!target) {
+        return NS_ERROR_INVALID_ARG;
+      }
+      nsEventDispatcher::DispatchDOMEvent(target, nullptr, mEvent,
+                                          nullptr, nullptr);
+    } else {
+      nsCOMPtr<nsIDOMEventTarget> target = do_QueryInterface(mEventNode);
+      bool defaultActionEnabled; // This is not used because the caller is async
+      target->DispatchEvent(mEvent, &defaultActionEnabled);
+    }
   } else {
     nsIDocument* doc = mEventNode->OwnerDoc();
     if (mDispatchChromeOnly) {