Fix `loading-view.js` NPE when hooking iframe `DOMContentLoaded` event
Fix loading-view.js
NPE when hooking iframe DOMContentLoaded
event
Closes https://gitlab.com/gitlab-org/gitter/webapp/issues/1949
Fix loading-view.js
NPE when hooking iframe DOMContentLoaded
event
Closes https://gitlab.com/gitlab-org/gitter/webapp/issues/1949