Template methods on Timer classes instead of the classes themselves.

net/disk_cache/blockfile/backend_impl_v3.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.
 
 // See net/disk_cache/disk_cache.h for the public interface of the cache.
 
 #ifndef NET_DISK_CACHE_BLOCKFILE_BACKEND_IMPL_V3_H_
 #define NET_DISK_CACHE_BLOCKFILE_BACKEND_IMPL_V3_H_
 
 #include "base/containers/hash_tables.h"
@@ skipping 253 matching lines @@
   bool restarted_;
   bool read_only_;  // Prevents updates of the rankings data (used by tools).
   bool disabled_;
   bool lru_eviction_;  // What eviction algorithm should be used.
   bool first_timer_;  // True if the timer has not been called.
   bool user_load_;  // True if we see a high load coming from the caller.
 
   net::NetLog* net_log_;
 
   Stats stats_;  // Usage statistics.
-  scoped_ptr<base::RepeatingTimer<BackendImplV3> > timer_;  // Usage timer.
+  scoped_ptr<base::RepeatingTimer> timer_;   // Usage timer.
   scoped_refptr<TraceObject> trace_object_;  // Initializes internal tracing.
   base::WeakPtrFactory<BackendImplV3> ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(BackendImplV3);
 };
 
 }  // namespace disk_cache
 
 #endif  // NET_DISK_CACHE_BLOCKFILE_BACKEND_IMPL_V3_H_