Add a device policy for specifying the release channel.

chrome/browser/chromeos/user_cros_settings_provider.cc

 // 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/chromeos/user_cros_settings_provider.h"
 
 #include <map>
 #include <set>
 
 #include "base/hash_tables.h"
@@ skipping 26 matching lines @@
 // true is default permissive value and false is safe prohibitic value.
 // Exception: kSignedDataRoamingEnabled which has default value of false.
 const char* kBooleanSettings[] = {
   kAccountsPrefAllowNewUser,
   kAccountsPrefAllowGuest,
   kAccountsPrefShowUserNamesOnSignIn,
   kSignedDataRoamingEnabled,
 };
 
 const char* kStringSettings[] = {
-  kDeviceOwner
+  kDeviceOwner,
+  kReleaseChannel
 };
 
 const char* kListSettings[] = {
   kAccountsPrefUsers
 };
 
 bool IsControlledBooleanSetting(const std::string& pref_path) {
   // TODO(nkostylev): Using std::find for 4 value array generates this warning
   // in chroot stl_algo.h:231: error: array subscript is above array bounds.
   // GCC 4.4.3
@@ skipping 543 matching lines @@
   if (cached_whitelist_update->Remove(email_value) != -1)
     prefs->ScheduleSavePersistentPrefs();
 }
 
 // static
 void UserCrosSettingsProvider::UpdateCachedOwner(const std::string& email) {
   UpdateCacheString(kDeviceOwner, email, USE_VALUE_SUPPLIED);
 }
 
 }  // namespace chromeos