[cros] Cleanup login auth stack: remove ClientLogin legacy code

* Remove Autheticator::RetryAuth() - was used to retry ClientLogin
* Remove Authenticator::AuthenticateToLogin() login_token, login_captcha parameters
* LoginPerformer - remove all code related to bringing up ScreenLock and dealing with ClientLogin results
* ParallelAuthenticator - make NEED_NEW_PW, HAVE_NEW_PW and ONLINE_FAILED states obsolete (ClientLogin related).
* ParallelAuthenticator unit_test - remove related test cases, always use OAuth code path

BUG=106538, 157246, 260219
NOTRY=true

Review URL: https://chromiumcodereview.appspot.com/18686006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@211779 0039d316-1c4b-4281-b951-d872f2087c98
9 files changed