Do minimal processing of gnubby data. Add request timeouts and send error

remoting/host/gnubby_util.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 REMOTING_HOST_GNUBBY_UTIL_H_
-#define REMOTING_HOST_GNUBBY_UTIL_H_
-
-#include <string>
-
-#include "base/basictypes.h"
-
-namespace base {
-
-class DictionaryValue;
-
-}  // namespace base
-
-namespace remoting {
-
-// Get a gnubbyd sign request json string from a request blob.
-bool GetJsonFromGnubbyRequest(const char* data,
-                              int data_len,
-                              std::string* json);
-
-// Get response blob data from a gnubbyd sign reply json string.
-void GetGnubbyResponseFromJson(const std::string& json, std::string* data);
-
-}  // namespace remoting
-
-#endif  // REMOTING_HOST_GNUBBY_UTIL_H_