services/test/echo/manifest.json

{
  "name": "echo",
  "display_name": "Echo Service",
  "interface_provider_specs": {
    "service_manager:connector": {
      "provides": {
        "echo" : [ "echo.mojom.Echo" ]
      },
      "requires": {
        "service_manager": [ "service_manager:all_users" ]
      }
    }
  }
}