chromium/third_party/blink/web_tests/virtual/fedcm-button-and-other-account/README.md

# FedCmButtonMode and FedCmAddAccount
This suite runs the tests in wpt/credential-management/fedcm-button-and-other-account/ with
`--enable-features=FedCmButtonMode,FedCmAddAccount`.

See crbug.com/40284792.