Revert of Refactoring : Move AuthAttempt and Authenticators to chromeos/login

chromeos/login/auth/authenticator.cc

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "chromeos/login/auth/authenticator.h"
-
-namespace chromeos {
-
-class AuthStatusConsumer;
-
-Authenticator::Authenticator(AuthStatusConsumer* consumer)
-    : consumer_(consumer), authentication_profile_(NULL) {
-}
-
-Authenticator::~Authenticator() {
-}
-
-void Authenticator::SetConsumer(AuthStatusConsumer* consumer) {
-  consumer_ = consumer;
-}
-
-}  // namespace chromeos