chromium/chrome/test/data/extensions/api_test/keybinding/global_media_keys_0/manifest.json

{
  "name": "An extension to test global media keys command",
  "version": "1.0",
  "manifest_version": 2,
  "background": {
    "scripts": ["background.js"]
  },
  "commands": {
    "MediaNextTrack-global": {
      "suggested_key": {
        "default": "MediaNextTrack"
      },
      "description": "Test passes if called.",
      "global": true
    },
    "MediaStop-global": {
      "suggested_key": {
        "default": "MediaStop"
      },
      "description": "Test failed if called (We didn't active this key).",
      "global": true
    }
  }
}