Make selected tab for CBD non-syncable

components/browsing_data/core/pref_names.cc

 // Copyright 2016 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/browsing_data/core/pref_names.h"
 
 #include "components/pref_registry/pref_registry_syncable.h"
 
 namespace browsing_data {
 
@@ skipping 66 matching lines @@
   registry->RegisterBooleanPref(
       kDeleteMediaLicenses, false,
       user_prefs::PrefRegistrySyncable::SYNCABLE_PREF);
   registry->RegisterBooleanPref(
       kDeleteSiteSettings, false,
       user_prefs::PrefRegistrySyncable::SYNCABLE_PREF);
   registry->RegisterInt64Pref(prefs::kLastClearBrowsingDataTime, 0);
 #endif  // !defined(OS_IOS)
 
 #if defined(OS_ANDROID)
-  registry->RegisterIntegerPref(
-      kLastClearBrowsingDataTab, 0,
-      user_prefs::PrefRegistrySyncable::SYNCABLE_PREF);
+  registry->RegisterIntegerPref(kLastClearBrowsingDataTab, 0);
 #endif
 
   registry->RegisterBooleanPref(
       kPreferencesMigratedToBasic, false,
       user_prefs::PrefRegistrySyncable::SYNCABLE_PREF);
 }
 
 }  // namespace prefs
 
 }  // namespace browsing_data