[Sync] Move //components/sync_driver to //components/sync/driver.

components/sync_driver/device_info_sync_service.h

-// Copyright 2014 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_DRIVER_DEVICE_INFO_SYNC_SERVICE_H_
-#define COMPONENTS_SYNC_DRIVER_DEVICE_INFO_SYNC_SERVICE_H_
-
-#include <stdint.h>
-
-#include <map>
-#include <memory>
-#include <string>
-
-#include "base/macros.h"
-#include "base/memory/scoped_vector.h"
-#include "base/observer_list.h"
-#include "base/time/time.h"
-#include "base/timer/timer.h"
-#include "components/sync/api/sync_change.h"
-#include "components/sync/api/sync_change_processor.h"
-#include "components/sync/api/sync_data.h"
-#include "components/sync/api/sync_error_factory.h"
-#include "components/sync/api/syncable_service.h"
-#include "components/sync_driver/device_info_tracker.h"
-
-namespace sync_driver {
-
-class LocalDeviceInfoProvider;
-
-// SyncableService implementation for DEVICE_INFO model type.
-class DeviceInfoSyncService : public syncer::SyncableService,
-                              public DeviceInfoTracker {
- public:
-  explicit DeviceInfoSyncService(
-      LocalDeviceInfoProvider* local_device_info_provider);
-  ~DeviceInfoSyncService() override;
-
-  // syncer::SyncableService implementation.
-  syncer::SyncMergeResult MergeDataAndStartSyncing(
-      syncer::ModelType type,
-      const syncer::SyncDataList& initial_sync_data,
-      std::unique_ptr<syncer::SyncChangeProcessor> sync_processor,
-      std::unique_ptr<syncer::SyncErrorFactory> error_handler) override;
-  void StopSyncing(syncer::ModelType type) override;
-  syncer::SyncDataList GetAllSyncData(syncer::ModelType type) const override;
-  syncer::SyncError ProcessSyncChanges(
-      const tracked_objects::Location& from_here,
-      const syncer::SyncChangeList& change_list) override;
-
-  // DeviceInfoTracker implementation.
-  bool IsSyncing() const override;
-  std::unique_ptr<DeviceInfo> GetDeviceInfo(
-      const std::string& client_id) const override;
-  ScopedVector<DeviceInfo> GetAllDeviceInfo() const override;
-  void AddObserver(Observer* observer) override;
-  void RemoveObserver(Observer* observer) override;
-  int CountActiveDevices() const override;
-
- private:
-  friend class DeviceInfoSyncServiceTest;
-
-  // Create SyncData from local DeviceInfo.
-  syncer::SyncData CreateLocalData(const DeviceInfo* info);
-  // Create SyncData from EntitySpecifics.
-  static syncer::SyncData CreateLocalData(
-      const sync_pb::EntitySpecifics& entity);
-
-  // Allocate new DeviceInfo from SyncData.
-  static DeviceInfo* CreateDeviceInfo(const syncer::SyncData& sync_data);
-  // Store SyncData in the cache.
-  void StoreSyncData(const std::string& client_id,
-                     const syncer::SyncData& sync_data);
-  // Delete SyncData from the cache.
-  void DeleteSyncData(const std::string& client_id);
-  // Notify all registered observers.
-  void NotifyObservers();
-
-  // Sends a copy of the current device's state to the processor/sync.
-  void SendLocalData(const syncer::SyncChange::SyncChangeType change_type);
-
-  // Finds the number of active devices give the current time, which allows for
-  // better unit tests.
-  int CountActiveDevices(const base::Time now) const;
-
-  // Find the timestamp for the last time this |device_info| was edited.
-  static base::Time GetLastUpdateTime(const syncer::SyncData& device_info);
-
-  // |local_device_info_provider_| isn't owned.
-  const LocalDeviceInfoProvider* const local_device_info_provider_;
-
-  // Receives ownership of |sync_processor_| and |error_handler_| in
-  // MergeDataAndStartSyncing() and destroy them in StopSyncing().
-  std::unique_ptr<syncer::SyncChangeProcessor> sync_processor_;
-  std::unique_ptr<syncer::SyncErrorFactory> error_handler_;
-
-  // Cache of all syncable and local data.
-  typedef std::map<std::string, syncer::SyncData> SyncDataMap;
-  SyncDataMap all_data_;
-
-  // Registered observers, not owned.
-  base::ObserverList<Observer, true> observers_;
-
-  // Used to update our local device info once every pulse interval.
-  base::OneShotTimer pulse_timer_;
-
-  DISALLOW_COPY_AND_ASSIGN(DeviceInfoSyncService);
-};
-
-}  // namespace sync_driver
-
-#endif  // COMPONENTS_SYNC_DRIVER_DEVICE_INFO_SYNC_SERVICE_H_