services/ui/demo/manifest.json

{
  "manifest_version":  1,
  "name": "mojo:mus_demo",
  "display_name": "MUS Demo",
  "capabilities": {
    "required": {
      "mojo:ui": {
        "interfaces": [ "ui::mojom::WindowManagerWindowTreeFactory"],
        "classes": [ "app" ]
      }
    }
  }
}