Add a SigninAllowed policy.

chrome/common/pref_names.cc

 // 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.
 
 #include "chrome/common/pref_names.h"
 
 #include "base/basictypes.h"
 
 namespace prefs {
 
@@ skipping 1720 matching lines @@
 const char kSyncSearchEngines[] = "sync.search_engines";
 const char kSyncSessions[] = "sync.sessions";
 const char kSyncHistoryDeleteDirectives[] = "sync.history_delete_directives";
 const char kSyncSyncedNotifications[] = "sync.synced_notifications";
 const char kSyncDictionary[] = "sync.dictionary";
 
 // Boolean used by enterprise configuration management in order to lock down
 // sync.
 const char kSyncManaged[] = "sync.managed";
 
+// Boolean which stores if the user is allowed to signin to chrome.
+const char kSigninAllowed[] = "signin.allowed";
+
 // Boolean to prevent sync from automatically starting up.  This is
 // used when sync is disabled by the user via the privacy dashboard.
 const char kSyncSuppressStart[] = "sync.suppress_start";
 
 // List of the currently acknowledged set of sync types, used to figure out
 // if a new sync type has rolled out so we can notify the user.
 const char kSyncAcknowledgedSyncTypes[] = "sync.acknowledged_types";
 
 // Dictionary from sync model type (as an int) to max invalidation
 // version (int64 represented as a string).
@@ skipping 530 matching lines @@
 const char kRLZDisabled[] = "rlz.disabled";
 #endif
 
 #if defined(ENABLE_APP_LIST)
 // The directory in user data dir that contains the profile to be used with the
 // app launcher.
 extern const char kAppListProfile[] = "app_list.profile";
 #endif
 
 }  // namespace prefs