Template methods on Timer classes instead of the classes themselves.

chrome/browser/notifications/extension_welcome_notification.cc

Index: chrome/browser/notifications/extension_welcome_notification.cc
diff --git a/chrome/browser/notifications/extension_welcome_notification.cc b/chrome/browser/notifications/extension_welcome_notification.cc
index 7ea0bb7a6ff06d6c6978acafd117208e1af491c4..c23b5d535c375d2c9f207c6671f973dbcfc60d01 100644
--- a/chrome/browser/notifications/extension_welcome_notification.cc
+++ b/chrome/browser/notifications/extension_welcome_notification.cc
@@ -308,8 +308,7 @@ void ExtensionWelcomeNotification::StartExpirationTimer() {
       expiration_timestamp = GetExpirationTimestamp();
       DCHECK(!expiration_timestamp.is_null());
     }
-    expiration_timer_.reset(
-        new base::OneShotTimer<ExtensionWelcomeNotification>());
+    expiration_timer_.reset(new base::OneShotTimer());
     expiration_timer_->Start(
         FROM_HERE,
         expiration_timestamp - delegate_->GetCurrentTime(),