Copy channel name in lambda

shell/common/shell.cc

@@ -1333,7 +1333,7 @@ void Shell::OnEngineChannelUpdate(const std::string& name, bool listening) {
   FML_DCHECK(task_runners_.GetUITaskRunner()->RunsTasksOnCurrentThread());
 
   task_runners_.GetPlatformTaskRunner()->PostTask(
-      [view = platform_view_->GetWeakPtr(), name, listening] {
+      [view = platform_view_->GetWeakPtr(), name = std::move(name), listening] {
         if (view) {
           view->SendChannelUpdate(name, listening);
         }