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

chrome/browser/history/typed_url_syncable_service.h

Index: chrome/browser/history/typed_url_syncable_service.h
diff --git a/chrome/browser/history/typed_url_syncable_service.h b/chrome/browser/history/typed_url_syncable_service.h
index d342c20ce6d454fc19e3db3f9bc786e3fd2b04ad..a0303a9ed8dca6e33aa56c0abf6de2177aa49d14 100644
--- a/chrome/browser/history/typed_url_syncable_service.h
+++ b/chrome/browser/history/typed_url_syncable_service.h
@@ -38,20 +38,19 @@ extern const char kTypedUrlTag[];
 class TypedUrlSyncableService : public syncer::SyncableService {
  public:
   explicit TypedUrlSyncableService(HistoryBackend* history_backend);
-  virtual ~TypedUrlSyncableService();
+  ~TypedUrlSyncableService() override;
 
   static syncer::ModelType model_type() { return syncer::TYPED_URLS; }
 
   // syncer::SyncableService implementation.
-  virtual syncer::SyncMergeResult MergeDataAndStartSyncing(
+  syncer::SyncMergeResult MergeDataAndStartSyncing(
       syncer::ModelType type,
       const syncer::SyncDataList& initial_sync_data,
       scoped_ptr<syncer::SyncChangeProcessor> sync_processor,
       scoped_ptr<syncer::SyncErrorFactory> error_handler) override;
-  virtual void StopSyncing(syncer::ModelType type) override;
-  virtual syncer::SyncDataList GetAllSyncData(
-      syncer::ModelType type) const override;
-  virtual syncer::SyncError ProcessSyncChanges(
+  void StopSyncing(syncer::ModelType type) override;
+  syncer::SyncDataList GetAllSyncData(syncer::ModelType type) const override;
+  syncer::SyncError ProcessSyncChanges(
       const tracked_objects::Location& from_here,
       const syncer::SyncChangeList& change_list) override;