[Sync] Stop accessing BrowserContextKeyedServiceFactory on non-UI thread.

components/autofill/core/browser/webdata/autofill_profile_data_type_controller.cc

 // Copyright 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/autofill/core/browser/webdata/autofill_profile_data_type_controller.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/metrics/histogram.h"
@@ skipping 10 matching lines @@
 AutofillProfileDataTypeController::AutofillProfileDataTypeController(
     scoped_refptr<base::SingleThreadTaskRunner> db_thread,
     const base::Closure& dump_stack,
     syncer::SyncClient* sync_client,
     const scoped_refptr<autofill::AutofillWebDataService>& web_data_service)
     : AsyncDirectoryTypeController(syncer::AUTOFILL_PROFILE,
                                    dump_stack,
                                    sync_client,
                                    syncer::GROUP_DB,
                                    std::move(db_thread)),
-      sync_client_(sync_client),
       web_data_service_(web_data_service),
       callback_registered_(false) {}
 
 void AutofillProfileDataTypeController::WebDatabaseLoaded() {
   DCHECK(CalledOnValidThread());
   OnModelLoaded();
 }
 
 void AutofillProfileDataTypeController::OnPersonalDataChanged() {
   DCHECK(CalledOnValidThread());
@@ skipping 44 matching lines @@
 
   return false;
 }
 
 void AutofillProfileDataTypeController::StopModels() {
   DCHECK(CalledOnValidThread());
   sync_client_->GetPersonalDataManager()->RemoveObserver(this);
 }
 
 }  // namespace browser_sync