chromium/extensions/test/data/api_test/usb/get_user_selected_devices/manifest.json

{
  "name": "chrome.usb.getUserSelectedDevices",
  "manifest_version": 2,
  "version": "0.1",
  "description": "browser test for chrome.usb.getUserSelectedDevices",
  "app": {
    "background": {
      "scripts": ["background.js"]
    }
  },
  "permissions": [
    "usb"
  ]
}