[Sync] Make ModelSafeWorker a true interface

chrome/browser/sync/engine/mock_model_safe_workers.h

-// Copyright (c) 2011 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 CHROME_BROWSER_SYNC_ENGINE_MOCK_MODEL_SAFE_WORKERS_H_
-#define CHROME_BROWSER_SYNC_ENGINE_MOCK_MODEL_SAFE_WORKERS_H_
-#pragma once
-
-#include <vector>
-
-#include "base/compiler_specific.h"
-#include "base/memory/ref_counted.h"
-#include "chrome/browser/sync/engine/model_safe_worker.h"
-#include "chrome/browser/sync/syncable/model_type.h"
-
-namespace browser_sync {
-
-class MockUIModelWorker : public ModelSafeWorker {
- public:
-  virtual ModelSafeGroup GetModelSafeGroup() OVERRIDE;
-};
-
-class MockDBModelWorker : public ModelSafeWorker {
- public:
-  virtual ModelSafeGroup GetModelSafeGroup() OVERRIDE;
-};
-
-class MockFileModelWorker : public ModelSafeWorker {
- public:
-  virtual ModelSafeGroup GetModelSafeGroup() OVERRIDE;
-};
-
-class MockModelSafeWorkerRegistrar : public ModelSafeWorkerRegistrar {
- public:
-  virtual ~MockModelSafeWorkerRegistrar();
-  static MockModelSafeWorkerRegistrar* PassiveBookmarks();
-  static MockModelSafeWorkerRegistrar* PassiveForTypes(
-      const syncable::ModelTypeBitSet& set);
-  virtual void GetWorkers(std::vector<ModelSafeWorker*>* out) OVERRIDE;
-  virtual void GetModelSafeRoutingInfo(ModelSafeRoutingInfo* out) OVERRIDE;
-
- private:
-  explicit MockModelSafeWorkerRegistrar(const ModelSafeRoutingInfo& routes);
-
-  scoped_refptr<ModelSafeWorker> passive_worker_;
-  ModelSafeRoutingInfo routes_;
-};
-
-}  // namespace browser_sync
-
-#endif  // CHROME_BROWSER_SYNC_ENGINE_MOCK_MODEL_SAFE_WORKERS_H_
-