NS_IMPL_ISUPPORTS(nsWebShellEventSinkGetter, nsCOMTypeInfo<nsIEventSinkGetter>::GetIID())
NS_IMPL_ISUPPORTS2(nsChannelListener, nsIStreamObserver, nsIStreamListener);
NS_IMPL_ISUPPORTS(nsWebShellEventSinkGetter, nsCOMTypeInfo<nsIEventSinkGetter>::GetIID())