Refactoring : Move AuthAttempt and Authenticators to chromeos/login

chromeos/login_event_recorder.h

+// Copyright (c) 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.
+
+#ifndef CHROMEOS_LOGIN_EVENT_RECORDER_H_
+#define CHROMEOS_LOGIN_EVENT_RECORDER_H_
+
+#include <string>
+
+#include "base/macros.h"
+#include "chromeos/chromeos_export.h"
+
+namespace chromeos {
+
+// BootTimesLoader loads the bootimes of Chrome OS from the file system.

[Nikita (slow), 2014/07/16 16:57:45]

nit: Comments needs to be updated.

+// Loading is done asynchronously on the file thread. Once loaded,
+// BootTimesLoader calls back to a method of your choice with the boot times.
+// To use BootTimesLoader, do the following:
+//
+// . In your class define a member field of type chromeos::BootTimesLoader and
+//   base::CancelableTaskTracker.
+// . Define the callback method, something like:
+//   void OnBootTimesLoaded(const BootTimesLoader::BootTimes& boot_times);
+// . When you want the version invoke: loader.GetBootTimes(callback, &tracker_);
+class CHROMEOS_EXPORT LoginEventRecorder {
+ public:
+  class Delegate {
+   public:
+    virtual void AddLoginTimeMarker(const std::string& marker_name,
+                                    bool send_to_uma) = 0;
+  };
+  LoginEventRecorder();
+  virtual ~LoginEventRecorder();
+
+  static LoginEventRecorder* Get();
+
+  void SetDelegate(Delegate* delegate);
+
+  // Add a time marker for login. A timeline will be dumped to
+  // /tmp/login-times-sent after login is done. If |send_to_uma| is true
+  // the time between this marker and the last will be sent to UMA with
+  // the identifier BootTime.|marker_name|.
+  void AddLoginTimeMarker(const std::string& marker_name, bool send_to_uma);
+
+ private:
+  Delegate* delegate_;
+
+  DISALLOW_COPY_AND_ASSIGN(LoginEventRecorder);
+};
+
+}  // namespace chromeos
+
+#endif  // CHROMEOS_LOGIN_EVENT_RECORDER_H_