Remove the notificationProvider extension API

chrome/browser/notifications/message_center_notification_manager.h

Index: chrome/browser/notifications/message_center_notification_manager.h
diff --git a/chrome/browser/notifications/message_center_notification_manager.h b/chrome/browser/notifications/message_center_notification_manager.h
index 3457e8c6f8762ddba1b35620467fc55069e4a791..7e7f24dde421ca1143866eb24264635518228488 100644
--- a/chrome/browser/notifications/message_center_notification_manager.h
+++ b/chrome/browser/notifications/message_center_notification_manager.h
@@ -79,12 +79,6 @@ class MessageCenterNotificationManager
       const std::string& delegate_id, Profile* profile);
 
  private:
-  // Adds |profile_notification| to an alternative provider extension or app.
-  void AddNotificationToAlternateProvider(
-      const Notification& notification,
-      Profile* profile,
-      const std::string& extension_id) const;
-
   FRIEND_TEST_ALL_PREFIXES(message_center::WebNotificationTrayTest,
                            ManuallyCloseMessageCenter);
 
@@ -105,10 +99,6 @@ class MessageCenterNotificationManager
   // notification is found.
   ProfileNotification* FindProfileNotification(const std::string& id) const;
 
-  // Get the extension ID of the extension that the user chose to take over
-  // Chorme Notification Center.
-  std::string GetExtensionTakingOverNotifications(Profile* profile);
-
   std::unique_ptr<message_center::NotifierSettingsProvider> settings_provider_;
 
   // To own the blockers.