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

chrome/browser/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 "chrome/browser/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