Remove enhanced bookmarks sync experiment

components/sync_driver/pref_names.cc

 // Copyright 2014 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 "components/sync_driver/pref_names.h"
 
 namespace sync_driver {
 
 namespace prefs {
 
-// Set to true when enhanced bookmarks experiment is enabled via Chrome sync.
-const char kEnhancedBookmarksExperimentEnabled[] = "enhanced_bookmarks_enabled";
-
-// Enhanced bookmarks extension id passed via Chrome sync.
-const char kEnhancedBookmarksExtensionId[] = "enhanced_bookmarks_extension_id";
-
 // 64-bit integer serialization of the base::Time when the last sync occurred.
 const char kSyncLastSyncedTime[] = "sync.last_synced_time";
 
 // Boolean specifying whether the user finished setting up sync.
 const char kSyncHasSetupCompleted[] = "sync.has_setup_completed";
 
 // Boolean specifying whether sync has an auth error.
 const char kSyncHasAuthError[] = "sync.has_auth_error";
 
 // Boolean specifying whether to automatically sync all data types (including
@@ skipping 71 matching lines @@
 
 // Stores how many times to try rollback before giving up.
 const char kSyncRemainingRollbackTries[] = "sync.remaining_rollback_tries";
 
 // Stores the timestamp of first sync.
 const char kSyncFirstSyncTime[] = "sync.first_sync_time";
 
 }  // namespace prefs
 
 }  // namespace sync_driver