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 78cdbee10653864d1e7ab36ae19c59ee6502aada..319bf1b5d42761703f8216a39bb96a57dce607ff 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;
@@ -36,6 +38,7 @@ class MESSAGE_CENTER_EXPORT CustomNotificationView : public MessageView {
   void UpdateControlButtonsVisibility() override;
 
   // Overridden from views::View:
+  const char* GetClassName() const override;
   gfx::Size GetPreferredSize() const override;
   void Layout() override;
   bool HasFocus() const override;