Linux native notifications: Add attribution

ui/message_center/notification.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 UI_MESSAGE_CENTER_NOTIFICATION_H_
 #define UI_MESSAGE_CENTER_NOTIFICATION_H_
 
 #include <stddef.h>
 
 #include <string>
@@ skipping 111 matching lines @@
   const base::string16& title() const { return title_; }
   void set_title(const base::string16& title) { title_ = title; }
 
   const base::string16& message() const { return message_; }
   void set_message(const base::string16& message) { message_ = message; }
 
   // The origin URL of the script which requested the notification.
   // Can be empty if the notification is requested by an extension or
   // Chrome app.
   const GURL& origin_url() const { return origin_url_; }
+  void set_origin_url(const GURL& origin_url) { origin_url_ = origin_url; }
 
   // A display string for the source of the notification.
   const base::string16& display_source() const { return display_source_; }
 
   const NotifierId& notifier_id() const { return notifier_id_; }
 
   void set_profile_id(const std::string& profile_id) {
     notifier_id_.profile_id = profile_id;
   }
 
@@ skipping 167 matching lines @@
   scoped_refptr<NotificationDelegate> delegate_;
 
 #if !defined(OS_IOS)
   friend struct mojo::StructTraits<mojom::NotificationDataView, Notification>;
 #endif
 };
 
 }  // namespace message_center
 
 #endif  // UI_MESSAGE_CENTER_NOTIFICATION_H_