Made notification center notifications collapsed and expandable.

ui/message_center/message_center.cc

 // 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.
 
 #include "ui/message_center/message_center.h"
 
 #include "base/logging.h"
 #include "base/memory/singleton.h"
 #include "base/observer_list.h"
 #include "ui/message_center/notification.h"
@@ skipping 85 matching lines @@
 
 void MessageCenter::SetNotificationButtonIcon(
     const std::string& notification_id, int button_index,
     const gfx::ImageSkia& image) {
   if (notification_list_->SetNotificationButtonIcon(notification_id,
                                                     button_index, image))
     NotifyMessageCenterChanged(true);
 }
 
 //------------------------------------------------------------------------------
-// Overridden from NotificationList::Delegate.
+// Overridden from NotificationList::Delegate:
 
 void MessageCenter::SendRemoveNotification(const std::string& id,
                                            bool by_user) {
   if (delegate_)
     delegate_->NotificationRemoved(id, by_user);
 }
 
 void MessageCenter::SendRemoveAllNotifications(bool by_user) {
   if (delegate_) {
     const NotificationList::Notifications& notifications =
@@ skipping 36 matching lines @@
 
 void MessageCenter::OnNotificationClicked(const std::string& id) {
   if (delegate_)
     delegate_->OnClicked(id);
   if (HasPopupNotifications()) {
     notification_list_->MarkSinglePopupAsShown(id, true);
     NotifyMessageCenterChanged(false);
   }
 }
 
-void MessageCenter::OnQuietModeChanged(bool quiet_mode) {
-  NotifyMessageCenterChanged(true);
-}
-
 void MessageCenter::OnButtonClicked(const std::string& id, int button_index) {
   if (delegate_)
     delegate_->OnButtonClicked(id, button_index);
   if (HasPopupNotifications()) {
     notification_list_->MarkSinglePopupAsShown(id, true);
     NotifyMessageCenterChanged(false);
   }
 }
 
-NotificationList* MessageCenter::GetNotificationList() {
-  return notification_list_.get();
+void MessageCenter::OnExpand(const std::string& id) {
+  notification_list_->MarkNotificationAsExpanded(id);
+}
+
+void MessageCenter::OnQuietModeChanged(bool quiet_mode) {
+  NotifyMessageCenterChanged(true);
 }
 
 void MessageCenter::Delegate::OnButtonClicked(const std::string& id,
                                               int button_index) {
 }
 
 //------------------------------------------------------------------------------
 // Private.
 
 void MessageCenter::NotifyMessageCenterChanged(bool new_notification) {
   FOR_EACH_OBSERVER(Observer,
                     observer_list_,
                     OnMessageCenterChanged(new_notification));
 }
 
 
 }  // namespace message_center