Template methods on Timer classes instead of the classes themselves.

chrome/browser/notifications/extension_welcome_notification.h

Index: chrome/browser/notifications/extension_welcome_notification.h
diff --git a/chrome/browser/notifications/extension_welcome_notification.h b/chrome/browser/notifications/extension_welcome_notification.h
index 00bc40cb41b4be2090ca23f27bc0944b179f49db..8fe32f1da027521e6b57507e23e5fd50f5ef69d5 100644
--- a/chrome/browser/notifications/extension_welcome_notification.h
+++ b/chrome/browser/notifications/extension_welcome_notification.h
@@ -151,8 +151,7 @@ class ExtensionWelcomeNotification : public KeyedService,
 
   // If the welcome notification is shown, this timer tracks when to hide the
   // welcome notification.
-  scoped_ptr<base::OneShotTimer<ExtensionWelcomeNotification> >
-      expiration_timer_;
+  scoped_ptr<base::OneShotTimer> expiration_timer_;
 
   // Delegate for Chrome global calls like base::Time::GetTime() for
   // testability.