Template methods on Timer classes instead of the classes themselves.

storage/browser/quota/quota_manager.h

 // Copyright 2013 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 STORAGE_BROWSER_QUOTA_QUOTA_MANAGER_H_
 #define STORAGE_BROWSER_QUOTA_QUOTA_MANAGER_H_
 
 #include <deque>
 #include <list>
 #include <map>
@@ skipping 434 matching lines @@
 
   int64 desired_available_space_;
 
   // Map from origin to count.
   std::map<GURL, int> origins_in_use_;
   // Map from origin to error count.
   std::map<GURL, int> origins_in_error_;
 
   scoped_refptr<SpecialStoragePolicy> special_storage_policy_;
 
-  base::RepeatingTimer<QuotaManager> histogram_timer_;
+  base::RepeatingTimer histogram_timer_;
 
   // Pointer to the function used to get the available disk space. This is
   // overwritten by QuotaManagerTest in order to attain a deterministic reported
   // value. The default value points to base::SysInfo::AmountOfFreeDiskSpace.
   GetAvailableDiskSpaceFn get_disk_space_fn_;
 
   scoped_ptr<StorageMonitor> storage_monitor_;
 
   base::WeakPtrFactory<QuotaManager> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(QuotaManager);
 };
 
 struct QuotaManagerDeleter {
   static void Destruct(const QuotaManager* manager) {
     manager->DeleteOnCorrectThread();
   }
 };
 
 }  // namespace storage
 
 #endif  // STORAGE_BROWSER_QUOTA_QUOTA_MANAGER_H_