sync: only use RecordUnrecoverableError for legacy types.

components/sync_driver/fake_data_type_controller.cc

Index: components/sync_driver/fake_data_type_controller.cc
diff --git a/components/sync_driver/fake_data_type_controller.cc b/components/sync_driver/fake_data_type_controller.cc
index 1d588c4bafa85106db7be694b2c48f3dbce1f024..3c507010001db9df7c10bc0d24d6e34059fcef5f 100644
--- a/components/sync_driver/fake_data_type_controller.cc
+++ b/components/sync_driver/fake_data_type_controller.cc
@@ -136,12 +136,6 @@ void FakeDataTypeController::OnSingleDatatypeUnrecoverableError(
   ADD_FAILURE() << message;
 }
 
-void FakeDataTypeController::RecordUnrecoverableError(
-    const tracked_objects::Location& from_here,
-    const std::string& message) {
-  ADD_FAILURE() << message;
-}
-
 void FakeDataTypeController::SetDelayModelLoad() {
   model_load_delayed_ = true;
 }