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

components/sync_driver/data_type_controller.cc

Index: components/sync_driver/data_type_controller.cc
diff --git a/components/sync_driver/data_type_controller.cc b/components/sync_driver/data_type_controller.cc
index dc91999dbbc8153120e851d2a7005ceef3193920..0e4bc4f10871ffe72dad3458c89753ded639beff 100644
--- a/components/sync_driver/data_type_controller.cc
+++ b/components/sync_driver/data_type_controller.cc
@@ -11,12 +11,10 @@
 namespace sync_driver {
 
 DataTypeController::DataTypeController(
-    scoped_refptr<base::SingleThreadTaskRunner> ui_thread,
+    const scoped_refptr<base::SingleThreadTaskRunner>& ui_thread,
     const base::Closure& error_callback)
     : base::RefCountedDeleteOnMessageLoop<DataTypeController>(ui_thread),
-      error_callback_(error_callback),
-      user_share_(NULL) {
-}
+      error_callback_(error_callback) {}
 
 DataTypeController::~DataTypeController() {
 }
@@ -41,14 +39,6 @@ syncer::SyncError DataTypeController::CreateAndUploadError(
                            type);
 }
 
-void DataTypeController::OnUserShareReady(syncer::UserShare* share) {
-  user_share_ = share;
-}
-
-syncer::UserShare* DataTypeController::user_share() const {
-  return user_share_;
-}
-
 bool DataTypeController::ReadyForStart() const {
   return true;
 }