Quit the message loop by default in ShellConnectionLost when ApplicationRunner is used

components/font_service/font_service_app.cc

Index: components/font_service/font_service_app.cc
diff --git a/components/font_service/font_service_app.cc b/components/font_service/font_service_app.cc
index 5942cb12ccce34ed14c139ed7877cce318425b02..6e73b9996236866fa043120d74c8a69638f49cd5 100644
--- a/components/font_service/font_service_app.cc
+++ b/components/font_service/font_service_app.cc
@@ -69,10 +69,6 @@ bool FontServiceApp::AcceptConnection(mojo::Connection* connection) {
   return true;
 }
 
-void FontServiceApp::ShellConnectionLost() {
-  _exit(1);
-}
-
 void FontServiceApp::Create(mojo::Connection* connection,
                             mojo::InterfaceRequest<FontService> request) {
   bindings_.AddBinding(this, std::move(request));