9a6f6c5a94
TEST=test cases added to `pkg/frontend_server/test/src/resident_frontend_server_test.dart` Change-Id: I6ffb810d38fc4b13326cb828785aaf6eb6de90f2 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/394764 Reviewed-by: Ben Konyi <bkonyi@google.com> Reviewed-by: Johnni Winther <johnniwinther@google.com>