[Chromoting] Implement the host domain policy.

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
+// and remoting/tools/me2me_virtual_host.py.
 enum HostExitCodes {
+  // Error codes that don't indicate a permanent error condition.
   kSuccessExitCode = 0,
   kReservedForX11ExitCode = 1,
+
+  // Error codes that do indicate a permanent error condition.
   kInvalidHostConfigurationExitCode = 2,
   kInvalidHostIdExitCode = 3,
   kInvalidOauthCredentialsExitCode = 4,
+  kInvalidHostDomainExitCode = 5,
 
   // The range of the exit codes that should be interpreted as a permanent error
   // condition.
   kMinPermanentErrorExitCode = kInvalidHostConfigurationExitCode,
-  kMaxPermanentErrorExitCode = kInvalidOauthCredentialsExitCode
+  kMaxPermanentErrorExitCode = kInvalidHostDomainExitCode
 };
 
 #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_