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

chrome/browser/sync/glue/ui_model_worker.h

Index: chrome/browser/sync/glue/ui_model_worker.h
diff --git a/chrome/browser/sync/glue/ui_model_worker.h b/chrome/browser/sync/glue/ui_model_worker.h
index b6841c375e697cb538fd35b6c49dfce58b58e921..cd0d1843598101af44fa5f109f700fb4e4a70d5e 100644
--- a/chrome/browser/sync/glue/ui_model_worker.h
+++ b/chrome/browser/sync/glue/ui_model_worker.h
@@ -22,15 +22,15 @@ class UIModelWorker : public syncer::ModelSafeWorker {
   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);
 };