third_party/blink/renderer/devtools/scripts/unused_css/package.json

{
  "name": "unused_css",
  "scripts": {
    "start": "node index.js"
  },
  "dependencies": {
    "acorn": "^6.1.1",
    "css": "^2.2.4",
    "css-what": "^2.1.3"
  }
}