Extend notifications.mojom for expandable notifications.

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 35 matching lines @@
   gfx::Image icon;
   ButtonType type = ButtonType::BUTTON;
   base::string16 placeholder;
 
   explicit ButtonInfo(const base::string16& title);
   ButtonInfo(const ButtonInfo& other);
   ~ButtonInfo();
   ButtonInfo& operator=(const ButtonInfo& other);
 };
 
+enum class NotificationExpandState { FIXED_SIZE, COLLAPSED, EXPANDED };
+
 class MESSAGE_CENTER_EXPORT RichNotificationData {
  public:
   RichNotificationData();
   RichNotificationData(const RichNotificationData& other);
   ~RichNotificationData();
 
   int priority;
   bool never_timeout;
   base::Time timestamp;
   base::string16 context_message;
   gfx::Image image;
   gfx::Image small_image;
   std::vector<NotificationItem> items;
   int progress;
   std::vector<ButtonInfo> buttons;
   bool should_make_spoken_feedback_for_popup_updates;
   bool clickable;
 #if defined(OS_CHROMEOS)
   // Flag if the notification is pinned. If true, the notification is pinned
   // and user can't remove it.
   bool pinned;
+  // For the expand state of the notification
+  NotificationExpandState expand_state;
 #endif  // defined(OS_CHROMEOS)
   std::vector<int> vibration_pattern;
   bool renotify;
   bool silent;
   base::string16 accessible_name;
 };
 
 class MESSAGE_CENTER_EXPORT Notification {
  public:
   // Default constructor needed for generated mojom files
@@ skipping 222 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_