Task Scheduler API migration: change BrowserThreadModelWorker to SequencedModelWorker

components/sync/engine/sync_backend_registrar.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/sync/engine/sync_backend_registrar.h"
 
 #include <algorithm>
 #include <cstddef>
 #include <utility>
 
@@ skipping 246 matching lines @@
   lock_.AssertAcquired();
   ModelSafeGroup group = GetGroupForModelType(model_type, routing_info_);
   DCHECK_NE(GROUP_NON_BLOCKING, group);
 
   if (group == GROUP_PASSIVE) {
     return IsControlType(model_type);
   }
 
   auto it = workers_.find(group);
   DCHECK(it != workers_.end());
-  return it->second->IsOnModelThread();
+  return it->second->IsOnModelSequence();
 }
 
 SyncBackendRegistrar::~SyncBackendRegistrar() {
   // All data types should have been deactivated by now.
   DCHECK(processors_.empty());
 }
 
 void SyncBackendRegistrar::MaybeAddWorker(ModelSafeWorkerFactory worker_factory,
                                           ModelSafeGroup group) {
   scoped_refptr<ModelSafeWorker> worker = worker_factory.Run(group);
   if (worker) {
     DCHECK(workers_.find(group) == workers_.end());
     workers_[group] = worker;
   }
 }
 
 ModelSafeGroup SyncBackendRegistrar::GetInitialGroupForType(
     ModelType type) const {
   return non_blocking_types_.Has(type) ? GROUP_NON_BLOCKING : GROUP_PASSIVE;
 }
 
 }  // namespace syncer