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

chrome/browser/sync/glue/ui_model_worker.h

 // 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.
 
 #ifndef CHROME_BROWSER_SYNC_GLUE_UI_MODEL_WORKER_H_
 #define CHROME_BROWSER_SYNC_GLUE_UI_MODEL_WORKER_H_
 
 #include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/synchronization/condition_variable.h"
 #include "base/synchronization/lock.h"
 #include "sync/internal_api/public/engine/model_safe_worker.h"
 #include "sync/internal_api/public/util/unrecoverable_error_info.h"
 
 namespace browser_sync {
 
 // A syncer::ModelSafeWorker for UI models (e.g. bookmarks) that
 // accepts work requests from the syncapi that need to be fulfilled
 // from the MessageLoop home to the native model.
 class UIModelWorker : public syncer::ModelSafeWorker {
  public:
   explicit UIModelWorker(syncer::WorkerLoopDestructionObserver* observer);
 
   // syncer::ModelSafeWorker implementation. Called on syncapi SyncerThread.
-  virtual void RegisterForLoopDestruction() override;
-  virtual syncer::ModelSafeGroup GetModelSafeGroup() override;
+  void RegisterForLoopDestruction() override;
+  syncer::ModelSafeGroup GetModelSafeGroup() override;
 
  protected:
-  virtual syncer::SyncerError DoWorkAndWaitUntilDoneImpl(
+  syncer::SyncerError DoWorkAndWaitUntilDoneImpl(
       const syncer::WorkCallback& work) override;
 
  private:
-  virtual ~UIModelWorker();
+  ~UIModelWorker() override;
 
   DISALLOW_COPY_AND_ASSIGN(UIModelWorker);
 };
 
 }  // namespace browser_sync
 
 #endif  // CHROME_BROWSER_SYNC_GLUE_UI_MODEL_WORKER_H_