chrome/common/extensions/docs/examples/api/fileSystemProvider/basic/manifest.json

{
  "name": "File System Provider API Example",
  "version": "0.1",
  "manifest_version": 2,
  "description":
      "Demonstrate features of the API like mounting, listing directories, etc",
  "permissions": [
    "fileSystemProvider"
  ],
  "app": {
    "background": {
      "scripts": [
        "background.js"
      ]
    }
  }
}