Remove many delegates, let's see what breaks

content/test/mock_platform_notification_service.cc

Index: content/test/mock_platform_notification_service.cc
diff --git a/content/test/mock_platform_notification_service.cc b/content/test/mock_platform_notification_service.cc
index 58db6968fe6370e92f3b5b40d25727755656d135..df3a32e783b7feebd3ebc6715d06b4850c7010da 100644
--- a/content/test/mock_platform_notification_service.cc
+++ b/content/test/mock_platform_notification_service.cc
@@ -166,11 +166,9 @@ void MockPlatformNotificationService::Close(
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   const auto non_persistent_iter =
       non_persistent_notifications_.find(notification_id);
-  if (non_persistent_iter == non_persistent_notifications_.end()) {
-    NotificationEventDispatcher::GetInstance()->DispatchNonPersistentCloseEvent(
-        notification_id);
-    non_persistent_notifications_.erase(non_persistent_iter);
-  }
+  content::NotificationEventDispatcher::GetInstance()
+      ->DispatchNonPersistentCloseEvent(notification_id);
+  non_persistent_notifications_.erase(non_persistent_iter);
 }
 
 void MockPlatformNotificationService::ReplaceNotificationIfNeeded(