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

components/sync/driver/glue/sync_backend_host_mock.cc

 // Copyright 2013 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/glue/sync_backend_host_mock.h"
 
 #include "components/sync/core/activation_context.h"
 #include "components/sync/driver/sync_frontend.h"
 
 namespace browser_sync {
@@ skipping 89 matching lines @@
 
 bool SyncBackendHostMock::HasUnsyncedItems() const {
   return false;
 }
 
 bool SyncBackendHostMock::IsNigoriEnabled() const {
   return true;
 }
 
 syncer::PassphraseType SyncBackendHostMock::GetPassphraseType() const {
-  return syncer::IMPLICIT_PASSPHRASE;
+  return syncer::PassphraseType::IMPLICIT_PASSPHRASE;
 }
 
 base::Time SyncBackendHostMock::GetExplicitPassphraseTime() const {
   return base::Time();
 }
 
 bool SyncBackendHostMock::IsCryptographerReady(
     const syncer::BaseTransaction* trans) const {
   return false;
 }
@@ skipping 28 matching lines @@
 
 void SyncBackendHostMock::ClearServerData(
     const syncer::SyncManager::ClearServerDataCallback& callback) {
   callback.Run();
 }
 
 void SyncBackendHostMock::OnCookieJarChanged(bool account_mismatch,
                                              bool empty_jar) {}
 
 }  // namespace browser_sync