[Sync] Improve MetadataChangeList usage for types using ModelTypeStore.

components/sync/device_info/device_info_sync_bridge.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_SYNC_BRIDGE_H_
 #define COMPONENTS_SYNC_DEVICE_INFO_DEVICE_INFO_SYNC_BRIDGE_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/device_info/device_info_tracker.h"
 #include "components/sync/device_info/local_device_info_provider.h"
 #include "components/sync/model/model_type_store.h"
 #include "components/sync/model/model_type_sync_bridge.h"
-#include "components/sync/model/simple_metadata_change_list.h"
 
 namespace sync_pb {
 class DeviceInfoSpecifics;
 }  // namespace sync_pb
 
 namespace syncer {
 
 class ModelTypeChangeProcessor;
 class SyncError;
 
@@ skipping 75 matching lines @@
   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);
 
   // 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.
@@ skipping 21 matching lines @@
 
   // Used to update our local device info once every pulse interval.
   base::OneShotTimer pulse_timer_;
 
   DISALLOW_COPY_AND_ASSIGN(DeviceInfoSyncBridge);
 };
 
 }  // namespace syncer
 
 #endif  // COMPONENTS_SYNC_DEVICE_INFO_DEVICE_INFO_SYNC_BRIDGE_H_