Template methods on Timer classes instead of the classes themselves.

chrome/browser/chromeos/extensions/install_limiter.h

 // Copyright (c) 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 CHROME_BROWSER_CHROMEOS_EXTENSIONS_INSTALL_LIMITER_H_
 #define CHROME_BROWSER_CHROMEOS_EXTENSIONS_INSTALL_LIMITER_H_
 
 #include <queue>
 #include <set>
 
@@ skipping 60 matching lines @@
   void Observe(int type,
                const content::NotificationSource& source,
                const content::NotificationDetails& details) override;
 
   content::NotificationRegistrar registrar_;
 
   DeferredInstallList deferred_installs_;
   CrxInstallerSet running_installers_;
 
   // A timer to wait before running deferred big app install.
-  base::OneShotTimer<InstallLimiter> wait_timer_;
+  base::OneShotTimer wait_timer_;
 
   bool disabled_for_test_;
 
   DISALLOW_COPY_AND_ASSIGN(InstallLimiter);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_CHROMEOS_EXTENSIONS_INSTALL_LIMITER_H_