Cleanup: merging three different constants.h into a single header.

remoting/host/constants.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 REMOTING_HOST_CONSTANTS_H_
-#define REMOTING_HOST_CONSTANTS_H_
-
-#include "base/compiler_specific.h"
-
-namespace remoting {
-
-// Known host exit codes.
-// Please keep this enum in sync with:
-// remoting/host/installer/mac/PrivilegedHelperTools/
-// org.chromium.chromoting.me2me.sh
-enum HostExitCodes {
-  kSuccessExitCode = 0,
-  kReservedForX11ExitCode = 1,
-  kInvalidHostConfigurationExitCode = 2,
-  kInvalidHostIdExitCode = 3,
-  kInvalidOauthCredentialsExitCode = 4,
-
-  // The range of the exit codes that should be interpreted as a permanent error
-  // condition.
-  kMinPermanentErrorExitCode = kInvalidHostConfigurationExitCode,
-  kMaxPermanentErrorExitCode = kInvalidOauthCredentialsExitCode
-};
-
-#if defined(OS_WIN)
-// The Omaha Appid of the host.
-extern const wchar_t kHostOmahaAppid[];
-#endif  // defined(OS_WIN)
-
-}  // namespace remoting
-
-#endif  // REMOTING_HOST_CONSTANTS_H_