Template methods on Timer classes instead of the classes themselves.

ash/system/tray/system_tray_bubble.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 ASH_SYSTEM_TRAY_SYSTEM_TRAY_BUBBLE_H_
 #define ASH_SYSTEM_TRAY_SYSTEM_TRAY_BUBBLE_H_
 
 #include "ash/system/user/login_status.h"
 #include "base/base_export.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 50 matching lines @@
 
  private:
   void CreateItemViews(user::LoginStatus login_status);
 
   ash::SystemTray* tray_;
   views::TrayBubbleView* bubble_view_;
   std::vector<ash::SystemTrayItem*> items_;
   BubbleType bubble_type_;
 
   int autoclose_delay_;
-  base::OneShotTimer<SystemTrayBubble> autoclose_;
+  base::OneShotTimer autoclose_;
 
   DISALLOW_COPY_AND_ASSIGN(SystemTrayBubble);
 };
 
 }  // namespace ash
 
 #endif  // ASH_SYSTEM_TRAY_SYSTEM_TRAY_BUBBLE_H_