replace OVERRIDE and FINAL with override and final in sync/

sync/test/null_directory_change_delegate.h

Index: sync/test/null_directory_change_delegate.h
diff --git a/sync/test/null_directory_change_delegate.h b/sync/test/null_directory_change_delegate.h
index 25ddd1b6449bfa0429f64282e67938922d28372f..c55b27e1c905100d09f4ad61e762b8438d339d12 100644
--- a/sync/test/null_directory_change_delegate.h
+++ b/sync/test/null_directory_change_delegate.h
@@ -19,16 +19,16 @@ class NullDirectoryChangeDelegate : public DirectoryChangeDelegate {
   virtual void HandleCalculateChangesChangeEventFromSyncApi(
       const ImmutableWriteTransactionInfo& write_transaction_info,
       BaseTransaction* trans,
-      std::vector<int64>* entries_changed) OVERRIDE;
+      std::vector<int64>* entries_changed) override;
   virtual void HandleCalculateChangesChangeEventFromSyncer(
       const ImmutableWriteTransactionInfo& write_transaction_info,
       BaseTransaction* trans,
-      std::vector<int64>* entries_changed) OVERRIDE;
+      std::vector<int64>* entries_changed) override;
   virtual ModelTypeSet HandleTransactionEndingChangeEvent(
       const ImmutableWriteTransactionInfo& write_transaction_info,
-      BaseTransaction* trans) OVERRIDE;
+      BaseTransaction* trans) override;
   virtual void HandleTransactionCompleteChangeEvent(
-      ModelTypeSet models_with_changes) OVERRIDE;
+      ModelTypeSet models_with_changes) override;
 };
 
 }  // namespace syncable