Not Remove Non-Closable Arc Popup When Close Button is Pressed

ui/message_center/views/custom_notification_view.h

Index: ui/message_center/views/custom_notification_view.h
diff --git a/ui/message_center/views/custom_notification_view.h b/ui/message_center/views/custom_notification_view.h
index 0700010253ee5b28ea2feac390fe1719ea79e365..0e614ad823e07ecaa7f9fe8612d090906ee1c191 100644
--- a/ui/message_center/views/custom_notification_view.h
+++ b/ui/message_center/views/custom_notification_view.h
@@ -19,6 +19,8 @@ namespace message_center {
 // content of the notification.
 class MESSAGE_CENTER_EXPORT CustomNotificationView : public MessageView {
  public:
+  static const char kViewClassName[];
+
   CustomNotificationView(MessageCenterController* controller,
                          const Notification& notification);
   ~CustomNotificationView() override;
@@ -35,6 +37,7 @@ class MESSAGE_CENTER_EXPORT CustomNotificationView : public MessageView {
   bool IsPinned() const override;
 
   // Overridden from views::View:
+  const char* GetClassName() const override;
   gfx::Size GetPreferredSize() const override;
   void Layout() override;
   bool HasFocus() const override;