Add UpdateNotificationSize to MessageCenterController.

ui/message_center/views/message_center_controller.h

 // Copyright 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_VIEWS_MESSAGE_CENTER_CONTROLLER_H_
 #define UI_MESSAGE_CENTER_VIEWS_MESSAGE_CENTER_CONTROLLER_H_
 
 #include <memory>
 #include <string>
 
@@ skipping 12 matching lines @@
   virtual void ClickOnNotification(const std::string& notification_id) = 0;
   virtual void RemoveNotification(const std::string& notification_id,
                                   bool by_user) = 0;
   virtual std::unique_ptr<ui::MenuModel> CreateMenuModel(
       const NotifierId& notifier_id,
       const base::string16& display_source) = 0;
   virtual bool HasClickedListener(const std::string& notification_id) = 0;
   virtual void ClickOnNotificationButton(const std::string& notification_id,
                                          int button_index) = 0;
   virtual void ClickOnSettingsButton(const std::string& notification_id) = 0;
+  // For ArcCustomNotificationView, size changes might come after the
+  // notification update over Mojo. Provide a method here to notify when
+  // a notification changed in some way and needs to be laid out again.
+  // See crbug.com/690813.
+  virtual void UpdateNotification(const std::string& notification_id) = 0;

[yoshiki, 2017/02/14 02:41:39]

nit: I think "UpdateNotificationSize" may be better since in ToastContentsView
this methold updates only its size.

[Eliot Courtney, 2017/02/14 03:32:15]

Done.

 };
 
 }  // namespace message_center
 
 #endif  // UI_MESSAGE_CENTER_VIEWS_MESSAGE_CENTER_CONTROLLER_H_