Template methods on Timer classes instead of the classes themselves.

chrome/browser/extensions/updater/extension_updater.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_EXTENSIONS_UPDATER_EXTENSION_UPDATER_H_
 #define CHROME_BROWSER_EXTENSIONS_UPDATER_EXTENSION_UPDATER_H_
 
 #include <list>
 #include <map>
 #include <set>
@@ skipping 236 matching lines @@
   // Pointer back to the service that owns this ExtensionUpdater.
   ExtensionServiceInterface* service_;
 
   // A closure passed into the ExtensionUpdater to teach it how to construct
   // new ExtensionDownloader instances.
   const ExtensionDownloader::Factory downloader_factory_;
 
   // Fetches the crx files for the extensions that have an available update.
   scoped_ptr<ExtensionDownloader> downloader_;
 
-  base::OneShotTimer<ExtensionUpdater> timer_;
+  base::OneShotTimer timer_;
   int frequency_seconds_;
   bool will_check_soon_;
 
   ExtensionPrefs* extension_prefs_;
   PrefService* prefs_;
   Profile* profile_;
 
   std::map<int, InProgressCheck> requests_in_progress_;
   int next_request_id_;
 
@@ skipping 24 matching lines @@
   std::set<std::string> forced_updates_;
 
   base::WeakPtrFactory<ExtensionUpdater> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionUpdater);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_UPDATER_EXTENSION_UPDATER_H_