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

components/sync_driver/glue/browser_thread_model_worker.h

-// 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.
-
-#ifndef COMPONENTS_SYNC_DRIVER_GLUE_BROWSER_THREAD_MODEL_WORKER_H_
-#define COMPONENTS_SYNC_DRIVER_GLUE_BROWSER_THREAD_MODEL_WORKER_H_
-
-#include "base/callback_forward.h"
-#include "base/compiler_specific.h"
-#include "base/macros.h"
-#include "components/sync/base/syncer_error.h"
-#include "components/sync/engine/model_safe_worker.h"
-
-namespace base {
-class SingleThreadTaskRunner;
-class WaitableEvent;
-}
-
-namespace browser_sync {
-
-// A syncer::ModelSafeWorker for models that accept requests from the
-// syncapi that need to be fulfilled on a browser thread, for example
-// autofill on the DB thread.
-// TODO(sync): Try to generalize other ModelWorkers (e.g. history, etc).
-class BrowserThreadModelWorker : public syncer::ModelSafeWorker {
- public:
-  BrowserThreadModelWorker(
-      const scoped_refptr<base::SingleThreadTaskRunner>& runner,
-      syncer::ModelSafeGroup group,
-      syncer::WorkerLoopDestructionObserver* observer);
-
-  // syncer::ModelSafeWorker implementation. Called on the sync thread.
-  void RegisterForLoopDestruction() override;
-  syncer::ModelSafeGroup GetModelSafeGroup() override;
-
- protected:
-  ~BrowserThreadModelWorker() override;
-
-  syncer::SyncerError DoWorkAndWaitUntilDoneImpl(
-      const syncer::WorkCallback& work) override;
-
-  // Marked pure virtual so subclasses have to override, but there is
-  // an implementation that subclasses should use.  This is so that
-  // (subclass)::CallDoWorkAndSignalTask shows up in callstacks.
-  virtual void CallDoWorkAndSignalTask(const syncer::WorkCallback& work,
-                                       base::WaitableEvent* done,
-                                       syncer::SyncerError* error);
-
- private:
-  scoped_refptr<base::SingleThreadTaskRunner> runner_;
-  syncer::ModelSafeGroup group_;
-
-  DISALLOW_COPY_AND_ASSIGN(BrowserThreadModelWorker);
-};
-
-}  // namespace browser_sync
-
-#endif  // COMPONENTS_SYNC_DRIVER_GLUE_BROWSER_THREAD_MODEL_WORKER_H_