[sync] Add constexpr to EnumSet

components/sync/driver/data_type_manager_impl.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/sync/driver/data_type_manager_impl.h"
 
 #include <algorithm>
 #include <functional>
 #include <utility>
 
@@ skipping 187 matching lines @@
 
 DataTypeManagerImpl::DataTypeConfigStateMap
 DataTypeManagerImpl::BuildDataTypeConfigStateMap(
     const ModelTypeSet& types_being_configured) const {
   // 1. Get the failed types (due to fatal, crypto, and unready errors).
   // 2. Add the difference between last_requested_types_ and the failed types
   //    as CONFIGURE_INACTIVE.
   // 3. Flip |types_being_configured| to CONFIGURE_ACTIVE.
   // 4. Set non-enabled user types as DISABLED.
   // 5. Set the fatal, crypto, and unready types to their respective states.
-  ModelTypeSet error_types = data_type_status_table_.GetFailedTypes();
   ModelTypeSet fatal_types = data_type_status_table_.GetFatalErrorTypes();
   ModelTypeSet crypto_types = data_type_status_table_.GetCryptoErrorTypes();
   ModelTypeSet unready_types = data_type_status_table_.GetUnreadyErrorTypes();
 
   // Types with persistence errors are only purged/resynced when they're
   // actively being configured.
   ModelTypeSet clean_types = data_type_status_table_.GetPersistenceErrorTypes();
   clean_types.RetainAll(types_being_configured);
 
   // Types with unready errors do not count as unready if they've been disabled.
@@ skipping 641 matching lines @@
 
 void DataTypeManagerImpl::SetTypeDownloaded(ModelType type, bool downloaded) {
   if (downloaded) {
     downloaded_types_.Put(type);
   } else {
     downloaded_types_.Remove(type);
   }
 }
 
 }  // namespace syncer