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

components/sync/api/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_MODEL_TYPE_SERVICE_H_
 #define COMPONENTS_SYNC_API_MODEL_TYPE_SERVICE_H_
 
 #include <memory>
 #include <string>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/memory/weak_ptr.h"
 #include "components/sync/api/conflict_resolution.h"
 #include "components/sync/api/data_type_error_handler.h"
 #include "components/sync/api/entity_change.h"
 #include "components/sync/api/entity_data.h"
 #include "components/sync/api/model_type_change_processor.h"
 #include "components/sync/api/sync_error.h"
 #include "components/sync/core/activation_context.h"
 
-namespace syncer {
+namespace syncer_v2 {
 
 class DataBatch;
 class MetadataChangeList;
 
 // Interface implemented by model types to receive updates from sync via the
 // SharedModelTypeProcessor. Provides a way for sync to update the data and
 // metadata for entities, as well as the model type state.
 class ModelTypeService : public base::SupportsWeakPtr<ModelTypeService> {
  public:
-  typedef base::Callback<void(SyncError, std::unique_ptr<DataBatch>)>
+  typedef base::Callback<void(syncer::SyncError, std::unique_ptr<DataBatch>)>
       DataCallback;
   typedef std::vector<std::string> StorageKeyList;
   typedef base::Callback<std::unique_ptr<ModelTypeChangeProcessor>(
-      ModelType type,
+      syncer::ModelType type,
       ModelTypeService* service)>
       ChangeProcessorFactory;
 
   ModelTypeService(const ChangeProcessorFactory& change_processor_factory,
-                   ModelType type);
+                   syncer::ModelType type);
 
   virtual ~ModelTypeService();
 
   // Creates an object used to communicate changes in the sync metadata to the
   // model type store.
   virtual std::unique_ptr<MetadataChangeList> CreateMetadataChangeList() = 0;
 
   // Perform the initial merge between local and sync data. This should only be
   // called when a data type is first enabled to start syncing, and there is no
   // sync metadata. Best effort should be made to match local and sync data. The
   // keys in the |entity_data_map| will have been created via GetClientTag(...),
   // and if a local and sync data should match/merge but disagree on tags, the
   // service should use the sync data's tag. Any local pieces of data that are
   // not present in sync should immediately be Put(...) to the processor before
   // returning. The same MetadataChangeList that was passed into this function
   // can be passed to Put(...) calls. Delete(...) can also be called but should
   // not be needed for most model types. Durable storage writes, if not able to
   // combine all change atomically, should save the metadata after the data
   // changes, so that this merge will be re-driven by sync if is not completely
   // saved during the current run.
-  virtual SyncError MergeSyncData(
+  virtual syncer::SyncError MergeSyncData(
       std::unique_ptr<MetadataChangeList> metadata_change_list,
       EntityDataMap entity_data_map) = 0;
 
   // Apply changes from the sync server locally.
   // Please note that |entity_changes| might have fewer entries than
   // |metadata_change_list| in case when some of the data changes are filtered
   // out, or even be empty in case when a commit confirmation is processed and
   // only the metadata needs to persisted.
-  virtual SyncError ApplySyncChanges(
+  virtual syncer::SyncError ApplySyncChanges(
       std::unique_ptr<MetadataChangeList> metadata_change_list,
       EntityChangeList entity_changes) = 0;
 
   // Asynchronously retrieve the corresponding sync data for |storage_keys|.
   virtual void GetData(StorageKeyList storage_keys, DataCallback callback) = 0;
 
   // Asynchronously retrieve all of the local sync data.
   virtual void GetAllData(DataCallback callback) = 0;
 
   // Get or generate a client tag for |entity_data|. This must be the same tag
@@ skipping 21 matching lines @@
   // Resolve a conflict between the client and server versions of data. They are
   // guaranteed not to match (both be deleted or have identical specifics). A
   // default implementation chooses the server data unless it is a deletion.
   virtual ConflictResolution ResolveConflict(
       const EntityData& local_data,
       const EntityData& remote_data) const;
 
   // Called by the DataTypeController to gather additional information needed
   // before the processor can be connected to a sync worker. Once the
   // metadata has been loaded, the info is collected and given to |callback|.
-  void OnSyncStarting(std::unique_ptr<DataTypeErrorHandler> error_handler,
-                      const ModelTypeChangeProcessor::StartCallback& callback);
+  void OnSyncStarting(
+      std::unique_ptr<syncer::DataTypeErrorHandler> error_handler,
+      const ModelTypeChangeProcessor::StartCallback& callback);
 
   // Indicates that we no longer want to do any sync-related things for this
   // data type. Severs all ties to the sync thread, deletes all local sync
   // metadata, and then destroys the change processor.
   // TODO(crbug.com/584365): This needs to be called from DataTypeController.
   void DisableSync();
 
   ModelTypeChangeProcessor* change_processor() const;
 
  protected:
   void CreateChangeProcessor();
 
   void clear_change_processor();
 
  private:
   std::unique_ptr<ModelTypeChangeProcessor> change_processor_;
 
   ChangeProcessorFactory change_processor_factory_;
 
-  const ModelType type_;
+  const syncer::ModelType type_;
 };
 
-}  // namespace syncer
+}  // namespace syncer_v2
 
 #endif  // COMPONENTS_SYNC_API_MODEL_TYPE_SERVICE_H_