Standardize usage of virtual/override/final in chrome/browser/sync_file_system/

chrome/browser/sync_file_system/drive_backend/sync_engine_initializer.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 CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_SYNC_ENGINE_INITIALIZER_H_
 #define CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_SYNC_ENGINE_INITIALIZER_H_
 
 #include <string>
 
 #include "base/memory/ref_counted.h"
@@ skipping 51 matching lines @@
 //    The contents are likely registered as app-root folders, but handle them
 //    as regular inactive folders until they are registered explicitly.
 //  - Populate database with the largest change ID, the sync-root folder and
 //    its contents.
 //
 class SyncEngineInitializer : public SyncTask {
  public:
   SyncEngineInitializer(SyncEngineContext* sync_context,
                         const base::FilePath& database_path,
                         leveldb::Env* env_override);
-  virtual ~SyncEngineInitializer();
-  virtual void RunPreflight(scoped_ptr<SyncTaskToken> token) override;
+  ~SyncEngineInitializer() override;
+  void RunPreflight(scoped_ptr<SyncTaskToken> token) override;
 
   scoped_ptr<MetadataDatabase> PassMetadataDatabase();
 
  private:
   typedef base::Callback<void(const SyncStatusCallback& callback)> Task;
 
   void GetAboutResource(scoped_ptr<SyncTaskToken> token);
   void DidGetAboutResource(
       scoped_ptr<SyncTaskToken> token,
       google_apis::GDataErrorCode error,
@@ skipping 34 matching lines @@
 
   base::WeakPtrFactory<SyncEngineInitializer> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(SyncEngineInitializer);
 };
 
 }  // namespace drive_backend
 }  // namespace sync_file_system
 
 #endif  // CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_SYNC_ENGINE_INITIALIZER_H_