Task Scheduler API migration: change BrowserThreadModelWorker to SequencedModelWorker

components/sync/engine/ui_model_worker.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/engine/ui_model_worker.h"
 
 #include <utility>
 
 namespace syncer {
 
 UIModelWorker::UIModelWorker(
     scoped_refptr<base::SingleThreadTaskRunner> ui_thread)
     : ui_thread_(std::move(ui_thread)) {}
 
 ModelSafeGroup UIModelWorker::GetModelSafeGroup() {
   return GROUP_UI;
 }
 
-bool UIModelWorker::IsOnModelThread() {
+bool UIModelWorker::IsOnModelSequence() {
   return ui_thread_->BelongsToCurrentThread();
 }
 
 UIModelWorker::~UIModelWorker() {}
 
 void UIModelWorker::ScheduleWork(base::OnceClosure work) {
   ui_thread_->PostTask(FROM_HERE, std::move(work));
 }
 
 }  // namespace syncer