headless/lib/browser/headless_browser_manifest_overlay.json

{
  "name": "content_browser",
  "interface_provider_specs": {
    "service_manager:connector": {
      "requires": {
        "pdf_compositor": [ "composite" ]
      }
    },
    "navigation:frame": {
      "provides": {
        "renderer": []
      }
    }
  }
}