[Sync] Pass ModelTypeSet by value everywhere

sync/internal_api/test/fake_sync_manager.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 "sync/internal_api/public/test/fake_sync_manager.h"
 
 #include <cstddef>
 
 #include "base/bind.h"
 #include "base/location.h"
@@ skipping 140 matching lines @@
   }
   progress_marker_types_.RemoveAll(partial_types);
   cleaned_types_.PutAll(partial_types);
   return true;
 }
 
 void FakeSyncManager::UpdateCredentials(const SyncCredentials& credentials) {
   NOTIMPLEMENTED();
 }
 
-void FakeSyncManager::UpdateEnabledTypes(const ModelTypeSet& types) {
+void FakeSyncManager::UpdateEnabledTypes(ModelTypeSet types) {
   enabled_types_ = types;
 }
 
 void FakeSyncManager::RegisterInvalidationHandler(
     InvalidationHandler* handler) {
   registrar_.RegisterHandler(handler);
 }
 
 void FakeSyncManager::UpdateRegisteredInvalidationIds(
     InvalidationHandler* handler,
     const ObjectIdSet& ids) {
   registrar_.UpdateRegisteredIds(handler, ids);
 }
 
 void FakeSyncManager::UnregisterInvalidationHandler(
     InvalidationHandler* handler) {
   registrar_.UnregisterHandler(handler);
 }
 
 void FakeSyncManager::StartSyncingNormally(
       const ModelSafeRoutingInfo& routing_info) {
   // Do nothing.
 }
 
 void FakeSyncManager::ConfigureSyncer(
     ConfigureReason reason,
-    const ModelTypeSet& types_to_config,
+    ModelTypeSet types_to_config,
     const ModelSafeRoutingInfo& new_routing_info,
     const base::Closure& ready_task,
     const base::Closure& retry_task) {
   ModelTypeSet enabled_types = GetRoutingInfoTypes(new_routing_info);
   ModelTypeSet disabled_types = Difference(
       ModelTypeSet::All(), enabled_types);
   ModelTypeSet success_types = types_to_config;
   success_types.RemoveAll(configure_fail_types_);
 
   DVLOG(1) << "Faking configuration. Downloading: "
@@ skipping 73 matching lines @@
   registrar_.EmitOnNotificationsEnabled();
 }
 
 void FakeSyncManager::DisableNotificationsOnSyncThread(
     NotificationsDisabledReason reason) {
   DCHECK(sync_task_runner_->RunsTasksOnCurrentThread());
   registrar_.EmitOnNotificationsDisabled(reason);
 }
 
 }  // namespace syncer