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

ui/message_center/views/message_view.cc

Index: ui/message_center/views/message_view.cc
diff --git a/ui/message_center/views/message_view.cc b/ui/message_center/views/message_view.cc
index 55502e9449493f2dfff39188336d12298d009c19..7591a5bf9f6de1d0401ebdb6c965e140af000488 100644
--- a/ui/message_center/views/message_view.cc
+++ b/ui/message_center/views/message_view.cc
@@ -212,6 +212,10 @@ void MessageView::OnGestureEvent(ui::GestureEvent* event) {
   event->SetHandled();
 }
 
+void MessageView::OnCloseButtonPressed() {
+  controller_->RemoveNotification(notification_id_, true);  // By user.
+}
+
 void MessageView::OnSlideOut() {
   controller_->RemoveNotification(notification_id_, true);  // By user.
 }