group("foo") {
  if (true) {
    if (true) {
      # TODO(crbug.com/123456789): Remove this circular dependency once the
      # following headers get componentized:
      # a/b/custom_handlers/protocol_handler_registry_factory.h
      # a/b/profiles/profile_io_data.h
      # a/b/history/top_sites_factory.h
      # a/b/history_embeddings/history_embeddings_service_factory.h
    }
  }
}