Template methods on Timer classes instead of the classes themselves.

extensions/browser/api/alarms/alarm_manager.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 EXTENSIONS_BROWSER_API_ALARMS_ALARM_MANAGER_H_
 #define EXTENSIONS_BROWSER_API_ALARMS_ALARM_MANAGER_H_
 
 #include <map>
 #include <queue>
 #include <string>
@@ skipping 202 matching lines @@
 
   content::BrowserContext* const browser_context_;
   scoped_ptr<base::Clock> clock_;
   scoped_ptr<Delegate> delegate_;
 
   // Listen to extension load notifications.
   ScopedObserver<ExtensionRegistry, ExtensionRegistryObserver>
       extension_registry_observer_;
 
   // The timer for this alarm manager.
-  base::OneShotTimer<AlarmManager> timer_;
+  base::OneShotTimer timer_;
 
   // A map of our pending alarms, per extension.
   // Invariant: None of the AlarmLists are empty.
   AlarmMap alarms_;
 
   // A map of actions waiting for alarm data to be synced from storage, per
   // extension.
   ReadyMap ready_actions_;
 
   // The previous time that alarms were run.
   base::Time last_poll_time_;
 
   // Next poll's time.
   base::Time next_poll_time_;
 
   DISALLOW_COPY_AND_ASSIGN(AlarmManager);
 };
 
 }  //  namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_API_ALARMS_ALARM_MANAGER_H_