services/test/echo/manifest.json

{
  "name": "echo",
  "display_name": "Echo Service",
  "options" : {
    "instance_sharing" : "shared_instance_across_users"
  },
  "interface_provider_specs": {
    "service_manager:connector": {
      "provides": {
        "echo" : [ "echo.mojom.Echo" ]
      }
    }
  }
}