chromium/chrome/test/data/extensions/platform_apps/window_api_cross_origin_isolation/manifest.json

{
  "name": "Windows API - alphaEnabled (wrong frame type)",
  "version": "1",
  "manifest_version": 2,
  "app": {
    "background": {
      "scripts": ["background.js"]
    }
  },
  "cross_origin_embedder_policy": {
    "value": "require-corp"
  },
  "cross_origin_opener_policy": {
    "value": "same-origin"
  }
}