Update policy backend and testserver for the newest policy protocol

chrome/browser/policy/proto/device_management_constants.cc

-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011 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.
 
 #include "chrome/browser/policy/proto/device_management_constants.h"
 
 namespace policy {
 
 const char kChromePolicyScope[] = "chromeos/device";
 const char kChromeDevicePolicySettingKey[] = "chrome-policy";
 
+const char kChromeDevicePolicyType[] = "google/chromeos/device";
+const char kChromeUserPolicyType[] = "google/chromeos/user";
+
+const char kRegisterRequestMachineModel[] = "Chrome OS";
+
 }  // namespace policy