This change renames CredentialsContainer.requireUserMediation to CredentialsContainer.preventSilentAccess in the Credential Management API.
Docs: https://developers.google.com/web/updates/2017/06/credential-management-updates https://developer.mozilla.org/en-US/docs/Web/API/CredentialsContainer https://developer.mozilla.org/en-US/docs/Web/API/CredentialsContainer/preventSilentAccess