chromium/extensions/test/data/app_view/apitest/no_embed_request_listener/manifest.json

{
  "name": "No embed request listener",
  "description": "An app that does not listen for onEmbedRequested",
  "manifest_version": 2,
  "version": "1.0",
  "app": {
    "background": {
      "scripts": ["background.js"]
    }
  }
}