Template methods on Timer classes instead of the classes themselves.

chrome/browser/memory/oom_priority_manager_delegate_chromeos.h

 // Copyright 2015 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_MEMORY_OOM_PRIORITY_MANAGER_DELEGATE_CHROMEOS_H_
 #define CHROME_BROWSER_MEMORY_OOM_PRIORITY_MANAGER_DELEGATE_CHROMEOS_H_
 
 #include <utility>
 #include <vector>
 
@@ skipping 47 matching lines @@
 
   // Posts AdjustFocusedTabScore task to the file thread.
   void OnFocusTabScoreAdjustmentTimeout();
 
   // Sets the score of the focused tab to the least value.
   void AdjustFocusedTabScoreOnFileThread();
 
   // Registrar to receive renderer notifications.
   content::NotificationRegistrar registrar_;
   // Timer to guarantee that the tab is focused for a certain amount of time.
-  base::OneShotTimer<OomPriorityManagerDelegate> focus_tab_score_adjust_timer_;
+  base::OneShotTimer focus_tab_score_adjust_timer_;
   // This lock is for |oom_score_map_| and |focused_tab_process_info_|.
   base::Lock oom_score_lock_;
   // Map maintaining the child process host id - oom_score mapping.
   typedef base::hash_map<int, int> ProcessScoreMap;
   ProcessScoreMap oom_score_map_;
   // Holds the focused tab's child process host id.
   ProcessInfo focused_tab_process_info_;
 
   DISALLOW_COPY_AND_ASSIGN(OomPriorityManagerDelegate);
 };
 
 }  // namespace memory
 
 #endif  // CHROME_BROWSER_MEMORY_OOM_PRIORITY_MANAGER_DELEGATE_CHROMEOS_H_