chromium/extensions/test/data/manifest_tests/externally_connectable_ids.json

{
  "name": "unit_tests --gtest_filter=ExternallyConnectableTest.IDs",
  "version": "1",
  "manifest_version": 2,
  "externally_connectable": {
    "ids": [
      "abcdefghijklmnopabcdefghijklmnop",
      "ponmlkjihgfedcbaponmlkjihgfedcba"
    ]
  }
}