Template methods on Timer classes instead of the classes themselves.

chrome/browser/chromeos/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_SESSION_LENGTH_LIMITER_H_
 #define CHROME_BROWSER_CHROMEOS_SESSION_LENGTH_LIMITER_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 45 matching lines @@
   // any time, switching between the two behaviors.
   void UpdateSessionStartTime();
 
   void UpdateLimit();
 
   base::ThreadChecker thread_checker_;
 
   scoped_ptr<Delegate> delegate_;
   PrefChangeRegistrar pref_change_registrar_;
 
-  scoped_ptr<base::OneShotTimer<SessionLengthLimiter::Delegate> > timer_;
+  scoped_ptr<base::OneShotTimer> timer_;
   base::TimeTicks session_start_time_;
   bool user_activity_seen_;
 
   DISALLOW_COPY_AND_ASSIGN(SessionLengthLimiter);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_SESSION_LENGTH_LIMITER_H_