[sync] skeleton implementation of TypedURLSyncBridge

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/feature_list.h"
 #include "base/memory/ptr_util.h"
@@ skipping 191 matching lines @@
     sync_service->RegisterDataTypeController(
         base::MakeUnique<BookmarkDataTypeController>(error_callback,
                                                      sync_client_));
   }
 
   const bool history_disabled =
       sync_client_->GetPrefService()->GetBoolean(history_disabled_pref_);
   // TypedUrl sync is enabled by default.  Register unless explicitly disabled,
   // or if saving history is disabled.
   if (!disabled_types.Has(syncer::TYPED_URLS) && !history_disabled) {
-    sync_service->RegisterDataTypeController(
-        base::MakeUnique<TypedUrlDataTypeController>(
-            error_callback, sync_client_, history_disabled_pref_));
+    if (base::FeatureList::IsEnabled(switches::kSyncUSSTypedURL)) {
+      sync_service->RegisterDataTypeController(
+          base::MakeUnique<ModelTypeController>(syncer::TYPED_URLS,
+                                                sync_client_, db_thread_));

[skym, 2017/03/03 17:41:09]

db_thread_ ? Are you sure that's right? I don't see any direct references to the
db thread in the existing typed urls code.

[Gang Wu, 2017/03/06 08:21:24]

will add real implementation later, so add TODO here.

+    } else {
+      sync_service->RegisterDataTypeController(
+          base::MakeUnique<TypedUrlDataTypeController>(
+              error_callback, sync_client_, history_disabled_pref_));
+    }
   }
 
   // Delete directive sync is enabled by default.  Register unless full history
   // sync is disabled.
   if (!disabled_types.Has(syncer::HISTORY_DELETE_DIRECTIVES) &&
       !history_disabled) {
     sync_service->RegisterDataTypeController(
         base::MakeUnique<HistoryDeleteDirectivesDataTypeController>(
             error_callback, sync_client_));
   }
@@ skipping 215 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