Revert of [Sync] Move //components/sync to the syncer namespace. (patchset #5 id:40001 of https://co

components/sync/api/stub_model_type_service.h

 // Copyright 2015 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.
 
 #ifndef COMPONENTS_SYNC_API_STUB_MODEL_TYPE_SERVICE_H_
 #define COMPONENTS_SYNC_API_STUB_MODEL_TYPE_SERVICE_H_
 
 #include <memory>
 #include <string>
 
 #include "components/sync/api/model_type_service.h"
 
-namespace syncer {
+namespace syncer_v2 {
 
 // A non-functional implementation of ModelTypeService for
 // testing purposes.
 class StubModelTypeService : public ModelTypeService {
  public:
   StubModelTypeService();
   explicit StubModelTypeService(
       const ChangeProcessorFactory& change_processor_factory);
   ~StubModelTypeService() override;
 
   std::unique_ptr<MetadataChangeList> CreateMetadataChangeList() override;
-  SyncError MergeSyncData(
+  syncer::SyncError MergeSyncData(
       std::unique_ptr<MetadataChangeList> metadata_change_list,
       EntityDataMap entity_data_map) override;
-  SyncError ApplySyncChanges(
+  syncer::SyncError ApplySyncChanges(
       std::unique_ptr<MetadataChangeList> metadata_change_list,
       EntityChangeList entity_changes) override;
   void GetData(StorageKeyList storage_keys, DataCallback callback) override;
   void GetAllData(DataCallback callback) override;
   std::string GetClientTag(const EntityData& entity_data) override;
   std::string GetStorageKey(const EntityData& entity_data) override;
   void OnChangeProcessorSet() override;
 
   bool HasChangeProcessor() const;
 };
 
-}  // namespace syncer
+}  // namespace syncer_v2
 
 #endif  // COMPONENTS_SYNC_API_STUB_MODEL_TYPE_SERVICE_H_