Delete deprecated synced notifications code

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 1106 matching lines @@
                               switches::kDisableSupervisedUserBlacklist)
   },
   {
     "enable-supervised-user-safesites",
     IDS_FLAGS_ENABLE_SUPERVISED_USER_SAFESITES_NAME,
     IDS_FLAGS_ENABLE_SUPERVISED_USER_SAFESITES_DESCRIPTION,
     kOsAndroid | kOsMac | kOsWin | kOsLinux | kOsCrOS,
     ENABLE_DISABLE_VALUE_TYPE(switches::kEnableSupervisedUserSafeSites,
                               switches::kDisableSupervisedUserSafeSites)
   },
-  {
-    "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)
   {
     "enable-sync-app-list",
     IDS_FLAGS_ENABLE_SYNC_APP_LIST_NAME,
     IDS_FLAGS_ENABLE_SYNC_APP_LIST_DESCRIPTION,
     kOsDesktop,
     ENABLE_DISABLE_VALUE_TYPE(app_list::switches::kEnableSyncAppList,
                               app_list::switches::kDisableSyncAppList)
   },
 #endif
@@ skipping 1505 matching lines @@
 }
 
 const Experiment* GetExperiments(size_t* count) {
   *count = num_experiments;
   return experiments;
 }
 
 }  // namespace testing
 
 }  // namespace about_flags