[Sync] Move //sync to //components/sync.

sync/internal_api/public/engine/passive_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 "sync/internal_api/public/engine/passive_model_worker.h"
-
-#include "base/message_loop/message_loop.h"
-
-namespace syncer {
-
-PassiveModelWorker::PassiveModelWorker(WorkerLoopDestructionObserver* observer)
-    : ModelSafeWorker(observer) {}
-
-PassiveModelWorker::~PassiveModelWorker() {
-}
-
-void PassiveModelWorker::RegisterForLoopDestruction() {
-  SetWorkingLoopToCurrent();
-}
-
-SyncerError PassiveModelWorker::DoWorkAndWaitUntilDoneImpl(
-    const WorkCallback& work) {
-  // Simply do the work on the current thread.
-  return work.Run();
-}
-
-ModelSafeGroup PassiveModelWorker::GetModelSafeGroup() {
-  return GROUP_PASSIVE;
-}
-
-}  // namespace syncer