Convert SessionLengthLimiter to OneShotTimer

chrome/browser/chromeos/power/session_length_limiter.h

Index: chrome/browser/chromeos/power/session_length_limiter.h
diff --git a/chrome/browser/chromeos/power/session_length_limiter.h b/chrome/browser/chromeos/power/session_length_limiter.h
index 996ea0b60140685dc353aea0340ff03f93770531..6abaea09102d87839a39bb2af99131df6540f091 100644
--- a/chrome/browser/chromeos/power/session_length_limiter.h
+++ b/chrome/browser/chromeos/power/session_length_limiter.h
@@ -38,25 +38,13 @@ class 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);
 };