[Sync] SyncEngine refactor part 1: interfaces.

components/sync/engine/fake_sync_engine.h

 // Copyright 2013 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_SYNC_BACKEND_HOST_MOCK_H_
-#define COMPONENTS_SYNC_DRIVER_GLUE_SYNC_BACKEND_HOST_MOCK_H_
+#ifndef COMPONENTS_SYNC_ENGINE_FAKE_SYNC_ENGINE_H_
+#define COMPONENTS_SYNC_ENGINE_FAKE_SYNC_ENGINE_H_
 
 #include <memory>
 #include <string>
 
 #include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "components/sync/base/weak_handle.h"
-#include "components/sync/driver/glue/sync_backend_host.h"
+#include "components/sync/engine/sync_engine.h"
 
 namespace syncer {
 
-// A mock of the SyncBackendHost.
+// A mock of the SyncEngine.
 //
 // This class implements the bare minimum required for the ProfileSyncService to
 // get through initialization.  It often returns null pointers or nonesense
-// values; it is not intended to be used in tests that depend on SyncBackendHost
+// values; it is not intended to be used in tests that depend on SyncEngine
 // behavior.
-class SyncBackendHostMock : public SyncBackendHost {
+class FakeSyncEngine : public SyncEngine {
  public:
-  SyncBackendHostMock();
-  ~SyncBackendHostMock() override;
+  FakeSyncEngine();
+  ~FakeSyncEngine() override;
 
   void Initialize(
-      SyncFrontend* frontend,
+      SyncEngineHost* host,
       scoped_refptr<base::SingleThreadTaskRunner> sync_task_runner,
       const WeakHandle<JsEventHandler>& event_handler,
       const GURL& service_url,
       const std::string& sync_user_agent,
       const SyncCredentials& credentials,
       bool delete_sync_data_folder,
       bool enable_local_sync_backend,
       const base::FilePath& local_sync_backend_folder,
       std::unique_ptr<SyncManagerFactory> sync_manager_factory,
       const WeakHandle<UnrecoverableErrorHandler>& unrecoverable_error_handler,
@@ skipping 70 matching lines @@
   void OnCookieJarChanged(bool account_mismatch, bool empty_jar) override;
 
   void set_fail_initial_download(bool should_fail);
 
  private:
   bool fail_initial_download_;
 };
 
 }  // namespace syncer
 
-#endif  // COMPONENTS_SYNC_DRIVER_GLUE_SYNC_BACKEND_HOST_MOCK_H_
+#endif  // COMPONENTS_SYNC_ENGINE_FAKE_SYNC_ENGINE_H_