Lock only permitted where a supervised user is or was.

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"
 #include "chrome/common/pref_font_webkit_names.h"
 
 namespace prefs {
@@ skipping 1167 matching lines @@
 // 0: Allow (does nothing)
 // 1: Warn.
 // 2: Block.
 const char kDefaultSupervisedUserFilteringBehavior[] =
     "profile.managed.default_filtering_behavior";
 
 // Whether this user is permitted to create supervised users.
 const char kSupervisedUserCreationAllowed[] =
     "profile.managed_user_creation_allowed";
 
+// Whether this browser has or hadat least one supervised user.

[noms (inactive), 2014/10/08 14:31:51]

nit: typo

[Mike Lerman, 2014/10/10 18:25:54]

Thi code is removed.

+const char kSupervisedUserExistsOrExisted[] =
+    "profile.managed_user_exists_or_existed";
+
 // List pref containing the users supervised by this user.
 const char kSupervisedUsers[] = "profile.managed_users";
 
 // String that indicates that the profile reset prompt has already been shown to
 // the user (profile).
 const char kProfileResetPromptMementoInProfilePrefs[] =
     "profile.reset_prompt_memento";
 
 // List pref containing the extension ids which are not allowed to send
 // notifications to the message center.
@@ skipping 1137 matching lines @@
 // Whether Guest Mode is enabled within the browser.
 const char kBrowserGuestModeEnabled[] = "profile.browser_guest_enabled";
 
 // Whether Adding a new Person is enabled within the user manager.
 const char kBrowserAddPersonEnabled[] = "profile.add_person_enabled";
 
 // A dictionary that maps user id to hardlock state.
 const char kEasyUnlockHardlockState[] = "easy_unlock.hardlock_state";
 
 }  // namespace prefs