[Sync] Move sessions/ to engine/cycle/ and rename things to match.

components/sync/engine_impl/update_handler.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_ENGINE_IMPL_UPDATE_HANDLER_H_
 #define COMPONENTS_SYNC_ENGINE_IMPL_UPDATE_HANDLER_H_
 
 #include <vector>
 
 #include "components/sync/base/syncer_error.h"
 
 namespace sync_pb {
 class DataTypeContext;
 class DataTypeProgressMarker;
 class SyncEntity;
 }
 
 typedef std::vector<const sync_pb::SyncEntity*> SyncEntityList;
 
 namespace syncer {
 
-namespace sessions {
+class ModelSafeWorker;
 class StatusController;
-}
-
-class ModelSafeWorker;
 
 // This class represents an entity that can request, receive, and apply updates
 // from the sync server.
 class UpdateHandler {
  public:
   UpdateHandler();
   virtual ~UpdateHandler() = 0;
 
   // Returns true if initial sync was performed for this type.
   virtual bool IsInitialSyncEnded() const = 0;
@@ skipping 15 matching lines @@
   //
   // In this context, "applicable_updates" means the set of updates belonging to
   // this type.
   //
   // Returns SYNCER_OK if the all data was processed successfully, a syncer
   // error otherwise.
   virtual SyncerError ProcessGetUpdatesResponse(
       const sync_pb::DataTypeProgressMarker& progress_marker,
       const sync_pb::DataTypeContext& mutated_context,
       const SyncEntityList& applicable_updates,
-      sessions::StatusController* status) = 0;
+      StatusController* status) = 0;
 
   // Called at the end of a non-configure GetUpdates loop to apply any unapplied
   // updates.
-  virtual void ApplyUpdates(sessions::StatusController* status) = 0;
+  virtual void ApplyUpdates(StatusController* status) = 0;
 
   // Called at the end of a configure GetUpdates loop to perform any required
   // post-initial-download update application.
-  virtual void PassiveApplyUpdates(sessions::StatusController* status) = 0;
+  virtual void PassiveApplyUpdates(StatusController* status) = 0;
 };
 
 }  // namespace syncer
 
 #endif  // COMPONENTS_SYNC_ENGINE_IMPL_UPDATE_HANDLER_H_