Remove #pragma once from sync

sync/engine/process_commit_response_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_COMMIT_RESPONSE_COMMAND_H_
 #define SYNC_ENGINE_PROCESS_COMMIT_RESPONSE_COMMAND_H_
-#pragma once
 
 #include <set>
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "sync/engine/model_changing_syncer_command.h"
 #include "sync/engine/syncproto.h"
 
 namespace syncer {
@@ skipping 109 matching lines @@
   const sessions::OrderedCommitSet& commit_set_;
   const ClientToServerMessage& commit_message_;
   const ClientToServerResponse& commit_response_;
 
   DISALLOW_COPY_AND_ASSIGN(ProcessCommitResponseCommand);
 };
 
 }  // namespace syncer
 
 #endif  // SYNC_ENGINE_PROCESS_COMMIT_RESPONSE_COMMAND_H_