[Athena] Extract Chrome OS authentication stack

chrome/browser/chromeos/login/users/supervised_user_manager_impl.cc

Index: chrome/browser/chromeos/login/users/supervised_user_manager_impl.cc
diff --git a/chrome/browser/chromeos/login/users/supervised_user_manager_impl.cc b/chrome/browser/chromeos/login/users/supervised_user_manager_impl.cc
index 6f04d9455571784d799e70e616f66d423c3d0af9..a892ad8de8d235df605ff42567bf3cc6925a48d2 100644
--- a/chrome/browser/chromeos/login/users/supervised_user_manager_impl.cc
+++ b/chrome/browser/chromeos/login/users/supervised_user_manager_impl.cc
@@ -21,6 +21,7 @@
 #include "chrome/browser/chromeos/profiles/profile_helper.h"
 #include "chrome/browser/supervised_user/supervised_user_service.h"
 #include "chrome/browser/supervised_user/supervised_user_service_factory.h"
+#include "chromeos/login/user_names.h"
 #include "chromeos/settings/cros_settings_names.h"
 #include "components/user_manager/user_type.h"
 #include "content/public/browser/browser_thread.h"
@@ -149,8 +150,8 @@ std::string SupervisedUserManagerImpl::GenerateUserId() {
   std::string id;
   bool user_exists;
   do {
-    id = base::StringPrintf("%d@%s", counter,
-        UserManager::kLocallyManagedUserDomain);
+    id = base::StringPrintf(
+        "%d@%s", counter, chromeos::login::kLocallyManagedUserDomain);
     counter++;
     user_exists = (NULL != owner_->FindUser(id));
     DCHECK(!user_exists);
@@ -430,7 +431,7 @@ void SupervisedUserManagerImpl::RollbackUserCreationTransaction() {
   }
 
   if (gaia::ExtractDomainName(user_id) !=
-          UserManager::kLocallyManagedUserDomain) {
+      chromeos::login::kLocallyManagedUserDomain) {
     LOG(WARNING) << "Clean up transaction for  non-locally managed user found :"
                  << user_id << ", will not remove data";
     prefs->ClearPref(kLocallyManagedUserCreationTransactionDisplayName);