TestAddObserver   282 chrome/browser/notifications/message_center_notifications_browsertest.cc   TestAddObserver observer(message_center());
TestAddObserver   321 chrome/browser/notifications/message_center_notifications_browsertest.cc   TestAddObserver observer(message_center());
TestAddObserver   363 chrome/browser/notifications/message_center_notifications_browsertest.cc   TestAddObserver observer(message_center());
TestAddObserver   404 chrome/browser/notifications/message_center_notifications_browsertest.cc   TestAddObserver observer(message_center());