[Sync] Move DataTypeErrorHandler to //sync.

components/sync_driver/data_type_error_handler_mock.cc

Index: components/sync_driver/data_type_error_handler_mock.cc
diff --git a/components/sync_driver/data_type_error_handler_mock.cc b/components/sync_driver/data_type_error_handler_mock.cc
deleted file mode 100644
index d6ab98f9f66cfcedd71dbcdaee65a392c31b78d5..0000000000000000000000000000000000000000
--- a/components/sync_driver/data_type_error_handler_mock.cc
+++ /dev/null
@@ -1,13 +0,0 @@
-// Copyright 2014 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.
-
-#include "components/sync_driver/data_type_error_handler_mock.h"
-
-namespace sync_driver {
-
-DataTypeErrorHandlerMock::DataTypeErrorHandlerMock() {}
-
-DataTypeErrorHandlerMock::~DataTypeErrorHandlerMock() {}
-
-}  // namespace sync_driver