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

components/sync/device_info/device_info_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_DEVICE_INFO_DEVICE_INFO_SERVICE_H_
 #define COMPONENTS_SYNC_DEVICE_INFO_DEVICE_INFO_SERVICE_H_
 
 #include <stdint.h>
 
 #include <map>
 #include <memory>
 #include <string>
 #include <vector>
 
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "base/observer_list.h"
 #include "base/time/time.h"
 #include "base/timer/timer.h"
 #include "components/sync/api/model_type_service.h"
 #include "components/sync/api/model_type_store.h"
 #include "components/sync/core/simple_metadata_change_list.h"
 #include "components/sync/device_info/device_info_tracker.h"
 #include "components/sync/device_info/local_device_info_provider.h"
 
 namespace syncer {
 class SyncError;
 }  // namespace syncer
 
-namespace syncer {
+namespace syncer_v2 {
 class ModelTypeChangeProcessor;
-}  // namespace syncer
+}  // namespace syncer_v2
 
 namespace sync_pb {
 class DeviceInfoSpecifics;
 }  // namespace sync_pb
 
-namespace syncer {
+namespace sync_driver_v2 {
 
 // USS service implementation for DEVICE_INFO model type. Handles storage of
 // device info and associated sync metadata, applying/merging foreign changes,
 // and allows public read access.
-class DeviceInfoService : public ModelTypeService, public DeviceInfoTracker {
+class DeviceInfoService : public syncer_v2::ModelTypeService,
+                          public sync_driver::DeviceInfoTracker {
  public:
-  typedef base::Callback<void(const ModelTypeStore::InitCallback& callback)>
+  typedef base::Callback<void(
+      const syncer_v2::ModelTypeStore::InitCallback& callback)>
       StoreFactoryFunction;
 
-  DeviceInfoService(LocalDeviceInfoProvider* local_device_info_provider,
-                    const StoreFactoryFunction& callback,
-                    const ChangeProcessorFactory& change_processor_factory);
+  DeviceInfoService(
+      sync_driver::LocalDeviceInfoProvider* local_device_info_provider,
+      const StoreFactoryFunction& callback,
+      const ChangeProcessorFactory& change_processor_factory);
   ~DeviceInfoService() override;
 
   // ModelTypeService implementation.
-  std::unique_ptr<MetadataChangeList> CreateMetadataChangeList() override;
-  SyncError MergeSyncData(
-      std::unique_ptr<MetadataChangeList> metadata_change_list,
-      EntityDataMap entity_data_map) override;
-  SyncError ApplySyncChanges(
-      std::unique_ptr<MetadataChangeList> metadata_change_list,
-      EntityChangeList entity_changes) override;
+  std::unique_ptr<syncer_v2::MetadataChangeList> CreateMetadataChangeList()
+      override;
+  syncer::SyncError MergeSyncData(
+      std::unique_ptr<syncer_v2::MetadataChangeList> metadata_change_list,
+      syncer_v2::EntityDataMap entity_data_map) override;
+  syncer::SyncError ApplySyncChanges(
+      std::unique_ptr<syncer_v2::MetadataChangeList> metadata_change_list,
+      syncer_v2::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;
+  std::string GetClientTag(const syncer_v2::EntityData& entity_data) override;
+  std::string GetStorageKey(const syncer_v2::EntityData& entity_data) override;
   void OnChangeProcessorSet() override;
 
   // DeviceInfoTracker implementation.
   bool IsSyncing() const override;
-  std::unique_ptr<DeviceInfo> GetDeviceInfo(
+  std::unique_ptr<sync_driver::DeviceInfo> GetDeviceInfo(
       const std::string& client_id) const override;
-  std::vector<std::unique_ptr<DeviceInfo>> GetAllDeviceInfo() const override;
+  std::vector<std::unique_ptr<sync_driver::DeviceInfo>> GetAllDeviceInfo()
+      const override;
   void AddObserver(Observer* observer) override;
   void RemoveObserver(Observer* observer) override;
   int CountActiveDevices() const override;
 
  private:
   friend class DeviceInfoServiceTest;
 
   // Cache of all syncable and local data, stored by device cache guid.
   using ClientIdToSpecifics =
       std::map<std::string, std::unique_ptr<sync_pb::DeviceInfoSpecifics>>;
 
   static std::unique_ptr<sync_pb::DeviceInfoSpecifics> CopyToSpecifics(
-      const DeviceInfo& info);
+      const sync_driver::DeviceInfo& info);
 
   // Allocate new DeviceInfo from SyncData.
-  static std::unique_ptr<DeviceInfo> CopyToModel(
+  static std::unique_ptr<sync_driver::DeviceInfo> CopyToModel(
       const sync_pb::DeviceInfoSpecifics& specifics);
   // Conversion as we prepare to hand data to the processor.
-  static std::unique_ptr<EntityData> CopyToEntityData(
+  static std::unique_ptr<syncer_v2::EntityData> CopyToEntityData(
       const sync_pb::DeviceInfoSpecifics& specifics);
 
   // Store SyncData in the cache and durable storage.
   void StoreSpecifics(std::unique_ptr<sync_pb::DeviceInfoSpecifics> specifics,
-                      ModelTypeStore::WriteBatch* batch);
+                      syncer_v2::ModelTypeStore::WriteBatch* batch);
   // Delete SyncData from the cache and durable storage, returns true if there
   // was actually anything at the given tag.
   bool DeleteSpecifics(const std::string& tag,
-                       ModelTypeStore::WriteBatch* batch);
+                       syncer_v2::ModelTypeStore::WriteBatch* batch);
 
   // Notify all registered observers.
   void NotifyObservers();
 
   // Used as callback given to LocalDeviceInfoProvider.
   void OnProviderInitialized();
 
   // Methods used as callbacks given to DataTypeStore.
-  void OnStoreCreated(ModelTypeStore::Result result,
-                      std::unique_ptr<ModelTypeStore> store);
-  void OnReadAllData(ModelTypeStore::Result result,
-                     std::unique_ptr<ModelTypeStore::RecordList> record_list);
+  void OnStoreCreated(syncer_v2::ModelTypeStore::Result result,
+                      std::unique_ptr<syncer_v2::ModelTypeStore> store);
+  void OnReadAllData(
+      syncer_v2::ModelTypeStore::Result result,
+      std::unique_ptr<syncer_v2::ModelTypeStore::RecordList> record_list);
   void OnReadAllMetadata(
-      ModelTypeStore::Result result,
-      std::unique_ptr<ModelTypeStore::RecordList> metadata_records,
+      syncer_v2::ModelTypeStore::Result result,
+      std::unique_ptr<syncer_v2::ModelTypeStore::RecordList> metadata_records,
       const std::string& global_metadata);
-  void OnCommit(ModelTypeStore::Result result);
+  void OnCommit(syncer_v2::ModelTypeStore::Result result);
 
   // Load metadata if the data is loaded and the provider is initialized.
   void LoadMetadataIfReady();
 
   // Performs reconciliation between the locally provided device info and the
   // stored device info data. If the sets of data differ, then we consider this
   // a local change and we send it to the processor.
   void ReconcileLocalAndStored();
 
   // Stores the updated version of the local copy of device info in durable
   // storage, in memory, and informs sync of the change. Should not be called
   // before the provider and processor have initialized.
   void SendLocalData();
 
   // Persists the changes in the given aggregators and notifies observers if
   // indicated to do as such.
-  void CommitAndNotify(std::unique_ptr<ModelTypeStore::WriteBatch> batch,
-                       std::unique_ptr<MetadataChangeList> metadata_change_list,
-                       bool should_notify);
+  void CommitAndNotify(
+      std::unique_ptr<syncer_v2::ModelTypeStore::WriteBatch> batch,
+      std::unique_ptr<syncer_v2::MetadataChangeList> metadata_change_list,
+      bool should_notify);
 
   // Counts the number of active devices relative to |now|. The activeness of a
   // device depends on the amount of time since it was updated, which means
   // comparing it against the current time. |now| is passed into this method to
   // allow unit tests to control expected results.
   int CountActiveDevices(const base::Time now) const;
 
   // Report an error starting up to sync if it tries to connect to this
   // datatype, since these errors prevent us from knowing if sync is enabled.
   void ReportStartupErrorToSync(const std::string& msg);
 
   // Find the timestamp for the last time this |device_info| was edited.
   static base::Time GetLastUpdateTime(
       const sync_pb::DeviceInfoSpecifics& specifics);
 
   // |local_device_info_provider_| isn't owned.
-  const LocalDeviceInfoProvider* const local_device_info_provider_;
+  const sync_driver::LocalDeviceInfoProvider* const local_device_info_provider_;
 
   ClientIdToSpecifics all_data_;
 
   // Registered observers, not owned.
   base::ObserverList<Observer, true> observers_;
 
   // Used to listen for provider initialization. If the provider is already
   // initialized during our constructor then the subscription is never used.
-  std::unique_ptr<LocalDeviceInfoProvider::Subscription> subscription_;
+  std::unique_ptr<sync_driver::LocalDeviceInfoProvider::Subscription>
+      subscription_;
 
   // In charge of actually persiting changes to disk, or loading previous data.
-  std::unique_ptr<ModelTypeStore> store_;
+  std::unique_ptr<syncer_v2::ModelTypeStore> store_;
 
   // If |local_device_info_provider_| has initialized.
   bool has_provider_initialized_ = false;
   // If data has been loaded from the store.
   bool has_data_loaded_ = false;
   // if |change_processor()| has been given metadata.
   bool has_metadata_loaded_ = false;
 
   // Used to update our local device info once every pulse interval.
   base::OneShotTimer pulse_timer_;
 
   DISALLOW_COPY_AND_ASSIGN(DeviceInfoService);
 };
 
-}  // namespace syncer
+}  // namespace sync_driver_v2
 
 #endif  // COMPONENTS_SYNC_DEVICE_INFO_DEVICE_INFO_SERVICE_H_