Supervised user blacklist: Make the cmdline flag an enable/disable type.

chrome/browser/about_flags.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/browser/about_flags.h"
 
 #include <iterator>
 #include <map>
 #include <set>
 #include <utility>
@@ skipping 1143 matching lines @@
     IDS_FLAGS_ENABLE_SUGGESTIONS_SERVICE_DESCRIPTION,
     kOsAndroid | kOsCrOS,
     ENABLE_DISABLE_VALUE_TYPE(switches::kEnableSuggestionsService,
                               switches::kDisableSuggestionsService)
   },
   {
     "enable-supervised-user-blacklist",
     IDS_FLAGS_ENABLE_SUPERVISED_USER_BLACKLIST_NAME,
     IDS_FLAGS_ENABLE_SUPERVISED_USER_BLACKLIST_DESCRIPTION,
     kOsAndroid | kOsMac | kOsWin | kOsLinux | kOsCrOS,
-    SINGLE_VALUE_TYPE(switches::kEnableSupervisedUserBlacklist)
+    ENABLE_DISABLE_VALUE_TYPE(switches::kEnableSupervisedUserBlacklist,
+                              switches::kDisableSupervisedUserBlacklist)
   },
   {
     "enable-sync-synced-notifications",
     IDS_FLAGS_ENABLE_SYNCED_NOTIFICATIONS_NAME,
     IDS_FLAGS_ENABLE_SYNCED_NOTIFICATIONS_DESCRIPTION,
     kOsDesktop,
     ENABLE_DISABLE_VALUE_TYPE(switches::kEnableSyncSyncedNotifications,
                               switches::kDisableSyncSyncedNotifications)
   },
 #if defined(ENABLE_APP_LIST)
@@ skipping 1350 matching lines @@
 }
 
 const Experiment* GetExperiments(size_t* count) {
   *count = num_experiments;
   return experiments;
 }
 
 }  // namespace testing
 
 }  // namespace about_flags