Remove enhanced bookmarks sync experiment

components/sync_driver/sync_prefs.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 "components/sync_driver/sync_prefs.h"
 
 #include "base/logging.h"
 #include "base/prefs/pref_member.h"
 #include "base/prefs/pref_service.h"
 #include "base/strings/string_number_conversions.h"
@@ skipping 54 matching lines @@
   // Include proxy types as well, as they can be individually selected,
   // although they don't have sync representations.
   user_types.PutAll(syncer::ProxyTypes());
 
   // Treat bookmarks and device info specially.
   RegisterDataTypePreferredPref(registry, syncer::BOOKMARKS, true);
   RegisterDataTypePreferredPref(registry, syncer::DEVICE_INFO, true);
   user_types.Remove(syncer::BOOKMARKS);
   user_types.Remove(syncer::DEVICE_INFO);
 
-  // These two prefs are set from sync experiment to enable enhanced bookmarks.
-  registry->RegisterIntegerPref(
-      prefs::kEnhancedBookmarksExperimentEnabled,
-      0,
-      user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
-
-  registry->RegisterStringPref(
-      prefs::kEnhancedBookmarksExtensionId,
-      std::string(),
-      user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
-
   // All types are set to off by default, which forces a configuration to
   // explicitly enable them. GetPreferredTypes() will ensure that any new
   // implicit types are enabled when their pref group is, or via
   // KeepEverythingSynced.
   for (syncer::ModelTypeSet::Iterator it = user_types.First(); it.Good();
        it.Inc()) {
     RegisterDataTypePreferredPref(registry, it.Get(), false);
   }
 
   registry->RegisterBooleanPref(
@@ skipping 376 matching lines @@
 
 void SyncPrefs::SetFirstSyncTime(base::Time time) {
   pref_service_->SetInt64(prefs::kSyncFirstSyncTime, time.ToInternalValue());
 }
 
 void SyncPrefs::ClearFirstSyncTime() {
   pref_service_->ClearPref(prefs::kSyncFirstSyncTime);
 }
 
 }  // namespace sync_driver