Support for auth code based authentication flow for both app and web UI driven flow.

chrome/browser/chromeos/login/online_attempt.cc

Index: chrome/browser/chromeos/login/online_attempt.cc
diff --git a/chrome/browser/chromeos/login/online_attempt.cc b/chrome/browser/chromeos/login/online_attempt.cc
index 9d086f43bbd09592decba458fdf28ae099069a40..74d7550b7a1940fa8ade83c6a8dc9911962b975a 100644
--- a/chrome/browser/chromeos/login/online_attempt.cc
+++ b/chrome/browser/chromeos/login/online_attempt.cc
@@ -138,8 +138,8 @@ void OnlineAttempt::TryClientLogin() {
       base::TimeDelta::FromMilliseconds(kClientLoginTimeoutMs));
 
   client_fetcher_->StartClientLogin(
-      attempt_->username,
-      attempt_->password,
+      attempt_->credentials.username,
+      attempt_->credentials.password,
       GaiaConstants::kSyncService,
       attempt_->login_token,
       attempt_->login_captcha,