chromium/third_party/blink/web_tests/external/wpt/close-watcher/esc-key/README.md

Tests in this directory are around the interaction of the Esc key specifically,
not the general concept of close requests. Ideally, all other tests would work
as-is if you changed the implementation of `sendCloseRequest()`. These tests
assume that Esc is the close request for the platform being tested.