Make progress notifications an alert.

chrome/browser/notifications/non_persistent_notification_handler.cc

 // Copyright 2016 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/non_persistent_notification_handler.h"
 
 #include "base/strings/nullable_string16.h"
 #include "chrome/browser/notifications/notification_delegate.h"
 #include "chrome/browser/notifications/platform_notification_service_impl.h"
 
@@ skipping 24 matching lines @@
   }
 }
 
 void NonPersistentNotificationHandler::OpenSettings(Profile* profile) {
   NotificationCommon::OpenNotificationSettings(profile);
 }
 
 void NonPersistentNotificationHandler::RegisterNotification(
     const std::string& notification_id,
     NotificationDelegate* delegate) {
-  DCHECK_EQ(notifications_.count(notification_id), 0u);

[Peter Beverloo, 2017/04/13 14:14:14]

ohhh I guess this is invalid for replacements, right?

[Miguel Garcia, 2017/04/13 16:36:19]

Acknowledged.

   notifications_[notification_id] =
       scoped_refptr<NotificationDelegate>(delegate);
 }