Revert of Renaming Gnubby and RemoteSecurityKey files/classes/members

remoting/host/security_key/security_key_message_writer.h

-// Copyright 2016 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 REMOTING_HOST_SECURITY_KEY_SECURITY_KEY_MESSAGE_WRITER_H_
-#define REMOTING_HOST_SECURITY_KEY_SECURITY_KEY_MESSAGE_WRITER_H_
-
-#include <string>
-
-#include "base/macros.h"
-#include "remoting/host/security_key/security_key_message.h"
-
-namespace remoting {
-
-// Used for sending security key messages using a file handle.
-class SecurityKeyMessageWriter {
- public:
-  virtual ~SecurityKeyMessageWriter() {}
-
-  // Writes a security key message w/o a payload to |output_stream_|.
-  virtual bool WriteMessage(SecurityKeyMessageType message_type) = 0;
-
-  // Writes a security key message with a payload to |output_stream_|.
-  virtual bool WriteMessageWithPayload(SecurityKeyMessageType message_type,
-                                       const std::string& message_payload) = 0;
-};
-
-}  // namespace remoting
-
-#endif  // REMOTING_HOST_SECURITY_KEY_SECURITY_KEY_MESSAGE_WRITER_H_