Enable RL sync by default on iOS

components/browser_sync/profile_sync_components_factory_impl.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/browser_sync/profile_sync_components_factory_impl.h"
 
 #include <utility>
 
 #include "base/debug/dump_without_crashing.h"
 #include "base/feature_list.h"
 #include "base/memory/ptr_util.h"
 #include "base/memory/ref_counted.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "build/build_config.h"
 #include "components/autofill/core/browser/autofill_wallet_data_type_controller.h"
 #include "components/autofill/core/browser/webdata/autofill_data_type_controller.h"
 #include "components/autofill/core/browser/webdata/autofill_profile_data_type_controller.h"
 #include "components/autofill/core/browser/webdata/autofill_webdata_service.h"
 #include "components/autofill/core/common/autofill_pref_names.h"
 #include "components/autofill/core/common/autofill_switches.h"
 #include "components/browser_sync/browser_sync_switches.h"
 #include "components/browser_sync/profile_sync_service.h"
 #include "components/dom_distiller/core/dom_distiller_features.h"
 #include "components/history/core/browser/history_delete_directives_data_type_controller.h"
 #include "components/history/core/browser/typed_url_data_type_controller.h"
 #include "components/password_manager/core/browser/password_store.h"
 #include "components/password_manager/sync/browser/password_data_type_controller.h"
 #include "components/prefs/pref_service.h"
+#include "components/reading_list/core/reading_list_switches.h"
 #include "components/sync/base/report_unrecoverable_error.h"
 #include "components/sync/device_info/device_info_data_type_controller.h"
 #include "components/sync/device_info/local_device_info_provider_impl.h"
 #include "components/sync/driver/data_type_manager_impl.h"
 #include "components/sync/driver/glue/sync_backend_host.h"
 #include "components/sync/driver/glue/sync_backend_host_impl.h"
 #include "components/sync/driver/model_type_controller.h"
 #include "components/sync/driver/proxy_data_type_controller.h"
 #include "components/sync/driver/sync_client.h"
 #include "components/sync/driver/sync_driver_switches.h"
@@ skipping 228 matching lines @@
         base::MakeUnique<UIDataTypeController>(syncer::PRIORITY_PREFERENCES,
                                                error_callback, sync_client_));
   }
 
   // Article sync is disabled by default.  Register only if explicitly enabled.
   if (dom_distiller::IsEnableSyncArticlesSet()) {
     sync_service->RegisterDataTypeController(
         base::MakeUnique<UIDataTypeController>(syncer::ARTICLES, error_callback,
                                                sync_client_));
   }
-  // Reading list sync is disabled by default.  Register only if explicitly
-  // enabled.
-  if (enabled_types.Has(syncer::READING_LIST)) {
+
+  // Reading list sync is enabled by default only on iOS. Register unless
+  // Reading List or Reading List Sync is explicitly disabled.
+  if (!disabled_types.Has(syncer::READING_LIST) &&
+      reading_list::switches::IsReadingListEnabled()) {
     sync_service->RegisterDataTypeController(
         base::MakeUnique<ModelTypeController>(
             syncer::READING_LIST, error_callback, sync_client_,
             base::ThreadTaskRunnerHandle::Get()));
   }
 }
 
 DataTypeManager* ProfileSyncComponentsFactoryImpl::CreateDataTypeManager(
     const syncer::WeakHandle<syncer::DataTypeDebugInfoListener>&
         debug_info_listener,
@@ skipping 128 matching lines @@
 
 // static
 void ProfileSyncComponentsFactoryImpl::OverridePrefsForUssTest(bool use_uss) {
   override_prefs_controller_to_uss_for_test_ = use_uss;
 }
 
 bool ProfileSyncComponentsFactoryImpl::
     override_prefs_controller_to_uss_for_test_ = false;
 
 }  // namespace browser_sync