Reland: Show message center on lock screen

ui/message_center/notification_list.h

 // Copyright (c) 2012 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_LIST_H_
 #define UI_MESSAGE_CENTER_NOTIFICATION_LIST_H_
 
 #include <stddef.h>
 
 #include <list>
@@ skipping 38 matching lines @@
 class MESSAGE_CENTER_EXPORT NotificationList {
  public:
   // Auto-sorted set. Matches the order in which Notifications are shown in
   // Notification Center.
   typedef std::set<Notification*, ComparePriorityTimestampSerial> Notifications;
 
   // Auto-sorted set used to return the Notifications to be shown as popup
   // toasts.
   typedef std::set<Notification*, CompareTimestampSerial> PopupNotifications;
 
-  explicit NotificationList();
+  explicit NotificationList(MessageCenter* message_center);
   virtual ~NotificationList();
 
-  // Affects whether or not a message has been "read". Collects the set of
-  // ids whose state have changed and set to |udpated_ids|. NULL if updated
-  // ids don't matter.
-  void SetMessageCenterVisible(bool visible,
-                               std::set<std::string>* updated_ids);
+  // Makes a message "read". Collects the set of ids whose state have changed
+  // and set to |udpated_ids|. NULL if updated ids don't matter.
+  void SetNotificationsShown(const NotificationBlockers& blockers,
+                             std::set<std::string>* updated_ids);
 
   void AddNotification(std::unique_ptr<Notification> notification);
 
   void UpdateNotificationMessage(
       const std::string& old_id,
       std::unique_ptr<Notification> new_notification);
 
   void RemoveNotification(const std::string& id);
 
   Notifications GetNotificationsByNotifierId(const NotifierId& notifier_id);
@@ skipping 53 matching lines @@
   // NULL. Notification instance is owned by this list.
   Notification* GetNotificationById(const std::string& id);
 
   // Returns all visible notifications, in a (priority-timestamp) order.
   // Suitable for rendering notifications in a MessageCenter.
   Notifications GetVisibleNotifications(
       const NotificationBlockers& blockers) const;
   size_t NotificationCount(const NotificationBlockers& blockers) const;
   size_t UnreadCount(const NotificationBlockers& blockers) const;
 
-  bool is_message_center_visible() const { return message_center_visible_; }
-
  private:
   friend class NotificationListTest;
   FRIEND_TEST_ALL_PREFIXES(NotificationListTest,
                            TestPushingShownNotification);
 
   // Iterates through the list and returns the first notification matching |id|.
   Notifications::iterator GetNotification(const std::string& id);
 
   void EraseNotification(Notifications::iterator iter);
 
   void PushNotification(std::unique_ptr<Notification> notification);
 
+  MessageCenter* message_center_;  // owner
   Notifications notifications_;
-  bool message_center_visible_;
   bool quiet_mode_;
 
   DISALLOW_COPY_AND_ASSIGN(NotificationList);
 };
 
 }  // namespace message_center
 
 #endif // UI_MESSAGE_CENTER_NOTIFICATION_LIST_H_