Make PassphraseType a "enum class" instead of "enum".

components/browser_sync/browser/profile_sync_service.cc

 // Copyright (c) 2012 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/browser_sync/browser/profile_sync_service.h"
 
 #include <stddef.h>
 
 #include <cstddef>
 #include <map>
@@ skipping 1713 matching lines @@
   for (DataTypeController::TypeMap::const_iterator it =
            data_type_controllers_.begin();
        it != data_type_controllers_.end(); ++it) {
     registered_types.Put(it->first);
   }
   return registered_types;
 }
 
 bool ProfileSyncService::IsUsingSecondaryPassphrase() const {
   syncer::PassphraseType passphrase_type = GetPassphraseType();
-  return passphrase_type == syncer::FROZEN_IMPLICIT_PASSPHRASE ||
-         passphrase_type == syncer::CUSTOM_PASSPHRASE;
+  return passphrase_type ==
+             syncer::PassphraseType::FROZEN_IMPLICIT_PASSPHRASE ||
+         passphrase_type == syncer::PassphraseType::CUSTOM_PASSPHRASE;
 }
 
 std::string ProfileSyncService::GetCustomPassphraseKey() const {
   sync_driver::SystemEncryptor encryptor;
   syncer::Cryptographer cryptographer(&encryptor);
   cryptographer.Bootstrap(sync_prefs_.GetEncryptionBootstrapToken());
   return cryptographer.GetDefaultNigoriKeyData();
 }
 
 syncer::PassphraseType ProfileSyncService::GetPassphraseType() const {
@@ skipping 789 matching lines @@
   if (--outstanding_setup_in_progress_handles_ != 0)
     return;
 
   DCHECK(startup_controller_->IsSetupInProgress());
   startup_controller_->SetSetupInProgress(false);
 
   if (IsBackendInitialized())
     ReconfigureDatatypeManager();
   NotifyObservers();
 }