Sync: Refactoring DataTypeController to make the design shareable with USS datatypes.

components/sync_driver/directory_data_type_controller.cc

Index: components/sync_driver/directory_data_type_controller.cc
diff --git a/components/sync_driver/directory_data_type_controller.cc b/components/sync_driver/directory_data_type_controller.cc
new file mode 100644
index 0000000000000000000000000000000000000000..7780cf44d4e33ae3853cd1bfe3f3a966204b4f9e
--- /dev/null
+++ b/components/sync_driver/directory_data_type_controller.cc
@@ -0,0 +1,31 @@
+// Copyright (c) 2015 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/directory_data_type_controller.h"
+
+#include "components/sync_driver/backend_data_type_configurer.h"
+
+namespace sync_driver {
+
+DirectoryDataTypeController::DirectoryDataTypeController(
+    scoped_refptr<base::SingleThreadTaskRunner> ui_thread,
+    const base::Closure& error_callback)
+    : DataTypeController(ui_thread, error_callback) {}
+
+DirectoryDataTypeController::~DirectoryDataTypeController() {}
+
+void DirectoryDataTypeController::ActivateDataType(
+    BackendDataTypeConfigurer* configurer) {
+  // Tell the backend about the change processor for this type so it can
+  // begin routing changes to it.
+  configurer->ActivateDataType(type(), model_safe_group(),
+                               GetChangeProcessor());
+}
+
+void DirectoryDataTypeController::DeactivateDataType(
+    BackendDataTypeConfigurer* configurer) {
+  configurer->DeactivateDataType(type());
+}
+
+}  // namespace sync_driver