Template methods on Timer classes instead of the classes themselves.

chrome/browser/notifications/extension_welcome_notification.cc

 // Copyright 2014 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.
 
 #include "chrome/browser/notifications/extension_welcome_notification.h"
 
 #include "base/guid.h"
 #include "base/lazy_instance.h"
 #include "base/location.h"
 #include "base/prefs/pref_service.h"
@@ skipping 290 matching lines @@
 }
 
 void ExtensionWelcomeNotification::StartExpirationTimer() {
   if (!expiration_timer_ && !IsWelcomeNotificationExpired()) {
     base::Time expiration_timestamp = GetExpirationTimestamp();
     if (expiration_timestamp.is_null()) {
       SetExpirationTimestampFromNow();
       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(),
         this,
         &ExtensionWelcomeNotification::ExpireWelcomeNotification);
   }
 }
 
 void ExtensionWelcomeNotification::StopExpirationTimer() {
   if (expiration_timer_) {
@@ skipping 24 matching lines @@
       prefs::kWelcomeNotificationExpirationTimestamp,
       (delegate_->GetCurrentTime() +
           base::TimeDelta::FromDays(kRequestedShowTimeDays)).ToInternalValue());
 }
 
 bool ExtensionWelcomeNotification::IsWelcomeNotificationExpired() const {
   const base::Time expiration_timestamp = GetExpirationTimestamp();
   return !expiration_timestamp.is_null() &&
          (expiration_timestamp <= delegate_->GetCurrentTime());
 }