chromium/chrome/test/data/extensions/api_test/webrequest_extensions/extension/manifest.json

{
  "name": "Extension",
  "version": "1",
  "manifest_version": 2,
  "background": {
    "scripts": ["background.js"],
    "persistent": true
  },
  "content_scripts": [{
    "js": ["contentscript.js"],
    "matches": ["*://*/*match_webrequest_test*"]
  }],
  "web_accessible_resources": ["frame.html"],
  "permissions": ["*://*/*"]
}