cros: Transfer auth cookies for SAML webview sign-in.

chrome/browser/chromeos/login/existing_user_controller.cc

Index: chrome/browser/chromeos/login/existing_user_controller.cc
diff --git a/chrome/browser/chromeos/login/existing_user_controller.cc b/chrome/browser/chromeos/login/existing_user_controller.cc
index aa9615b1e6b1bcb1f88d2ad8ff16260567373635..db71d44015004370c3ea01509f9f0754aec527e8 100644
--- a/chrome/browser/chromeos/login/existing_user_controller.cc
+++ b/chrome/browser/chromeos/login/existing_user_controller.cc
@@ -589,9 +589,15 @@ void ExistingUserController::OnAuthSuccess(const UserContext& user_context) {
 
   StopPublicSessionAutoLoginTimer();
 
+  // Truth table of |has_auth_cookies|:
+  //                          Regular        SAML
+  //  /ServiceLogin              T            T
+  //  /ChromeOsEmbeddedSetup     F            T
+  //  Bootstrap experiment       F            N/A
   const bool has_auth_cookies =
       login_performer_->auth_mode() == LoginPerformer::AUTH_MODE_EXTENSION &&
-      user_context.GetAuthCode().empty() &&
+      (user_context.GetAuthCode().empty() ||
+       user_context.GetAuthFlow() == UserContext::AUTH_FLOW_GAIA_WITH_SAML) &&
       user_context.GetAuthFlow() != UserContext::AUTH_FLOW_EASY_BOOTSTRAP;
 
   // LoginPerformer instance will delete itself in case of successful auth.