Allow sync with 2-factor StrongAuth accounts in ChromeOS.

chrome/browser/chromeos/login/google_authenticator.h

Index: chrome/browser/chromeos/login/google_authenticator.h
diff --git a/chrome/browser/chromeos/login/google_authenticator.h b/chrome/browser/chromeos/login/google_authenticator.h
index d0651fa3fc00a373b46a59058ab7a74e7e211f64..06218b4db37799ddc144026461d241794d091ef6 100644
--- a/chrome/browser/chromeos/login/google_authenticator.h
+++ b/chrome/browser/chromeos/login/google_authenticator.h
@@ -100,6 +100,8 @@ class GoogleAuthenticator : public Authenticator, public GaiaAuthConsumer {
                  const std::string& login_token,
                  const std::string& login_captcha);
 
+  const GoogleServiceAuthError& last_error() { return last_error_; }
+
   // Callbacks from GaiaAuthFetcher
   virtual void OnClientLoginFailure(
       const GoogleServiceAuthError& error);
@@ -197,6 +199,8 @@ class GoogleAuthenticator : public Authenticator, public GaiaAuthConsumer {
   bool checked_for_localaccount_;  // needed because empty localaccount_ is ok.
   Lock localaccount_lock_;  // a lock around checked_for_localaccount_.
 
+  GoogleServiceAuthError last_error_;
+
   friend class GoogleAuthenticatorTest;
   FRIEND_TEST_ALL_PREFIXES(GoogleAuthenticatorTest, SaltToAscii);
   FRIEND_TEST_ALL_PREFIXES(GoogleAuthenticatorTest, CheckTwoFactorResponse);