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

components/sync_driver/non_ui_data_type_controller.h

Index: components/sync_driver/non_ui_data_type_controller.h
diff --git a/components/sync_driver/non_ui_data_type_controller.h b/components/sync_driver/non_ui_data_type_controller.h
index 09bee6a6fe830bce20ef6d2dbb2409750c276b8b..5bf93effc4bcff5d164228ca1253c750aee25ae9 100644
--- a/components/sync_driver/non_ui_data_type_controller.h
+++ b/components/sync_driver/non_ui_data_type_controller.h
@@ -11,7 +11,7 @@
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
-#include "components/sync_driver/data_type_controller.h"
+#include "components/sync_driver/directory_data_type_controller.h"
 #include "components/sync_driver/shared_change_processor.h"
 
 namespace syncer {
@@ -22,10 +22,10 @@ namespace sync_driver {
 
 class SyncClient;
 
-class NonUIDataTypeController : public DataTypeController {
+class NonUIDataTypeController : public DirectoryDataTypeController {
  public:
   NonUIDataTypeController(
-      scoped_refptr<base::SingleThreadTaskRunner> ui_thread,
+      const scoped_refptr<base::SingleThreadTaskRunner>& ui_thread,
       const base::Closure& error_callback,
       SyncClient* sync_client);