Bug 1639328 - Fix browser_hidden_iframe.js. r=yzen

Differential Revision: https://phabricator.services.mozilla.com/D86591

accessible/tests/browser/fission/browser_hidden_iframe.js

@@ -28,21 +28,20 @@ addAccessibleTask(
     );
 
     const events = [[EVENT_REORDER, contentDocAcc]];
-    if (!gIsRemoteIframe) {
-      // Until this event is fired, IFRAME accessible has no children attached.
-      events.push([
-        EVENT_STATE_CHANGE,
-        event => {
-          const scEvent = event.QueryInterface(nsIAccessibleStateChangeEvent);
-          const id = getAccessibleDOMNodeID(event.accessible);
-          return (
-            id === DEFAULT_IFRAME_DOC_BODY_ID &&
-            scEvent.state === STATE_BUSY &&
-            scEvent.isEnabled === false
-          );
-        },
-      ]);
-    }
+    // Until this event is fired, IFRAME accessible has no children attached.
+    events.push([
+      EVENT_STATE_CHANGE,
+      event => {
+        const scEvent = event.QueryInterface(nsIAccessibleStateChangeEvent);
+        const id = getAccessibleDOMNodeID(event.accessible);
+        return (
+          id === DEFAULT_IFRAME_DOC_BODY_ID &&
+          scEvent.state === STATE_BUSY &&
+          scEvent.isEnabled === false
+        );
+      },
+    ]);
+
     const onEvents = waitForEvents(events);
     await SpecialPowers.spawn(browser, [DEFAULT_IFRAME_ID], contentId => {
       content.document.getElementById(contentId).style.display = "";