Extension alarms now persist in Preferences.

base/timer.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.
 
 // OneShotTimer and RepeatingTimer provide a simple timer API.  As the names
 // suggest, OneShotTimer calls you back once after a time delay expires.
 // RepeatingTimer on the other hand calls you back periodically with the
 // prescribed time interval.
 //
 // OneShotTimer and RepeatingTimer both cancel the timer when they go out of
@@ skipping 90 matching lines @@
 
   // Call this method to stop and cancel the timer.  It is a no-op if the timer
   // is not running.
   void Stop();
 
   // Call this method to reset the timer delay. The user_task_ must be set. If
   // the timer is not running, this will start it by posting a task.
   void Reset();
 
   const base::Closure& user_task() const { return user_task_; }
+  const TimeTicks& desired_run_time() const { return desired_run_time_; }
 
  protected:
   // Used to initiate a new delayed task.  This has the side-effect of disabling
   // scheduled_task_ if it is non-null.
   void SetTaskInfo(const tracked_objects::Location& posted_from,
                    TimeDelta delay,
                    const base::Closure& user_task);
 
  private:
   friend class BaseTimerTaskInternal;
@@ skipping 110 matching lines @@
       : Timer(posted_from, delay,
               base::Bind(method, base::Unretained(receiver)),
               false) {}
 
   void Reset() { Timer::Reset(); }
 };
 
 }  // namespace base
 
 #endif  // BASE_TIMER_H_