Convert SessionLengthLimiter to OneShotTimer

chrome/browser/chromeos/power/session_length_limiter.h

 // Copyright (c) 2012 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 CHROME_BROWSER_CHROMEOS_POWER_SESSION_LENGTH_LIMITER_H_
 #define CHROME_BROWSER_CHROMEOS_POWER_SESSION_LENGTH_LIMITER_H_
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/prefs/public/pref_change_registrar.h"
@@ skipping 20 matching lines @@
 
   // Registers preferences.
   static void RegisterPrefs(PrefRegistrySimple* registry);
 
   SessionLengthLimiter(Delegate* delegate, bool browser_restarted);
   ~SessionLengthLimiter();
 
  private:
   void OnSessionLengthLimitChanged();
 
-  // Starts a timer that periodically checks whether the remaining time has
-  // reached zero.
-  void StartTimer();
-
-  // Stops the timer.
-  void StopTimer();
-
-  // Updates the remaining time, and terminates the session when the time
-  // reaches zero.
-  void UpdateRemainingTime();
-
   base::ThreadChecker thread_checker_;
 
   scoped_ptr<Delegate> delegate_;
   PrefChangeRegistrar pref_change_registrar_;
 
-  scoped_ptr<base::RepeatingTimer<SessionLengthLimiter> > repeating_timer_;
+  scoped_ptr<base::OneShotTimer<SessionLengthLimiter::Delegate> > timer_;
   base::Time session_start_time_;
-  base::TimeDelta session_length_limit_;
 
   DISALLOW_COPY_AND_ASSIGN(SessionLengthLimiter);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_POWER_SESSION_LENGTH_LIMITER_H_