[Sync] Rename csync namespace to syncer

sync/engine/process_updates_command.h

 // Copyright (c) 2012 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 SYNC_ENGINE_PROCESS_UPDATES_COMMAND_H_
 #define SYNC_ENGINE_PROCESS_UPDATES_COMMAND_H_
 #pragma once
 
 #include "base/compiler_specific.h"
 #include "sync/engine/model_changing_syncer_command.h"
 #include "sync/engine/syncer_types.h"
 
 namespace syncable {
 class WriteTransaction;
 }
 
 namespace sync_pb {
 class SyncEntity;
 }
 
-namespace csync {
+namespace syncer {
 
 class Cryptographer;
 
 // A syncer command for processing updates.
 //
 // Preconditions - updates in the SyncerSesssion have been downloaded
 //                 and verified.
 //
 // Postconditions - All of the verified SyncEntity data will be copied to
 //                  the server fields of the corresponding syncable entries.
@@ skipping 11 matching lines @@
       sessions::SyncSession* session) OVERRIDE;
 
  private:
   ServerUpdateProcessingResult ProcessUpdate(
       const sync_pb::SyncEntity& proto_update,
       const Cryptographer* cryptographer,
       syncable::WriteTransaction* const trans);
   DISALLOW_COPY_AND_ASSIGN(ProcessUpdatesCommand);
 };
 
-}  // namespace csync
+}  // namespace syncer
 
 #endif  // SYNC_ENGINE_PROCESS_UPDATES_COMMAND_H_