chromium/extensions/test/data/file_util/bad_icon/manifest.json

{
  "name": "My extension with a zero-length icon",
  "version": "1.0",
  "icons": {
    "16": "good-icon.png",
    "32": "missing-icon.png",
    "64": "icon.png"
  },
  "manifest_version": 2
}