Change primordial pipes to ShellClient

components/mus/mus_app.h

Index: components/mus/mus_app.h
diff --git a/components/mus/mus_app.h b/components/mus/mus_app.h
index b6a431f40b695b55da55e1630e6398b6cebf1602..fca8db14fc56a5772b960ef3ead832fc2f425868 100644
--- a/components/mus/mus_app.h
+++ b/components/mus/mus_app.h
@@ -22,6 +22,7 @@
 #include "components/mus/ws/platform_display_init_params.h"
 #include "components/mus/ws/user_id.h"
 #include "mojo/services/tracing/public/cpp/tracing_impl.h"
+#include "mojo/shell/public/cpp/application_runner.h"
 #include "mojo/shell/public/cpp/interface_factory.h"
 #include "mojo/shell/public/cpp/shell_client.h"
 
@@ -74,6 +75,7 @@ class MandolineUIServicesApp
   void Initialize(mojo::Connector* connector, const mojo::Identity& identity,
                   uint32_t id) override;
   bool AcceptConnection(mojo::Connection* connection) override;
+  void ShellConnectionLost() override;
 
   // ConnectionManagerDelegate:
   void OnFirstDisplayReady() override;