Web platform tests are copied from https://github.com/web-platform-tests/wpt at revision `5adfe4e8cd223729aa2942915e8a515c079ed0ef`.

Includes:
- `LICENSE.md`
- `accname/manual/name*` test files
- `accname/manual/description*` test files
- `accname/manual/foo.jpg`
- `accname/name/comp*` test files
- `accname/name/shadowdom/*` test files
- `wai-aria/scripts/manual.css`

Instead of including `wai-aria/scripts/ATTAcomm.js` and `wai-aria/scripts/aria-utils.js`, we provide our own harness.