Set the #WebKitCredential of the proposed authentication challenge.
Set the #WebKitCredential of the proposed authentication challenge that was
stored from a previous session. This should only be used by applications handling
their own credential storage. (When using the default WebKit credential storage,
webkit.authentication_request.AuthenticationRequest.getProposedCredential already contains previously-stored
credentials.)
Passing a null credential will clear the proposed credential.
Set the #WebKitCredential of the proposed authentication challenge.
Set the #WebKitCredential of the proposed authentication challenge that was stored from a previous session. This should only be used by applications handling their own credential storage. (When using the default WebKit credential storage, webkit.authentication_request.AuthenticationRequest.getProposedCredential already contains previously-stored credentials.) Passing a null credential will clear the proposed credential.