Revert of Add account_type into AccountId

chromeos/cryptohome/cryptohome_parameters.cc

Index: chromeos/cryptohome/cryptohome_parameters.cc
diff --git a/chromeos/cryptohome/cryptohome_parameters.cc b/chromeos/cryptohome/cryptohome_parameters.cc
index 4f6d5579fb955ec3b880d50c8f607183445db253..9ce9c917de6459108320a22d95615be724e16ed0 100644
--- a/chromeos/cryptohome/cryptohome_parameters.cc
+++ b/chromeos/cryptohome/cryptohome_parameters.cc
@@ -19,7 +19,7 @@
 
 const std::string GetCryptohomeId(const AccountId& account_id) {
   // Guest/kiosk/managed/public accounts have empty GaiaId. Default to email.
-  if (account_id.GetAccountType() == AccountType::UNKNOWN)
+  if (account_id.GetGaiaId().empty())
     return account_id.GetUserEmail();  // Migrated
 
   if (GetGaiaIdMigrationStatus(account_id))
@@ -56,7 +56,7 @@
   // A LOT of tests start with --login_user <user>, and not registing this user
   // before. So we might have "known_user" entry without gaia_id.
   for (const AccountId& known_id : known_account_ids) {
-    if (known_id.HasAccountIdKey() && known_id.GetAccountIdKey() == id_) {
+    if (!known_id.GetGaiaId().empty() && known_id.GetAccountIdKey() == id_) {
       return known_id;
     }
   }
@@ -67,8 +67,8 @@
     }
   }
 
-  return user_manager::known_user::GetAccountId(id_, std::string() /* id */,
-                                                AccountType::UNKNOWN);
+  return user_manager::known_user::GetAccountId(id_,
+                                                std::string() /* gaia_id */);
 }
 
 KeyDefinition::AuthorizationData::Secret::Secret() : encrypt(false),