user_observer.h   21 ash/system/tray/system_tray_notifier.h #include "ash/system/user/user_observer.h"
user_observer.h   11 ash/system/user/tray_user.h #include "ash/system/user/user_observer.h"
user_observer.h   33 chrome/browser/ui/ash/system_tray_delegate_chromeos.cc #include "ash/system/user/user_observer.h"