[SyncFS] SyncWorker cache refresh token status

chrome/browser/sync_file_system/drive_backend/drive_service_on_worker.cc

Index: chrome/browser/sync_file_system/drive_backend/drive_service_on_worker.cc
diff --git a/chrome/browser/sync_file_system/drive_backend/drive_service_on_worker.cc b/chrome/browser/sync_file_system/drive_backend/drive_service_on_worker.cc
index 935a351a005809125e60e745fe675d4388e75156..8fc92d70dd5503ddbd1ae2bfada7d2d1a0e544a4 100644
--- a/chrome/browser/sync_file_system/drive_backend/drive_service_on_worker.cc
+++ b/chrome/browser/sync_file_system/drive_backend/drive_service_on_worker.cc
@@ -93,7 +93,6 @@ google_apis::CancelCallback DriveServiceOnWorker::DownloadFile(
   return google_apis::CancelCallback();
 }
 
-
 google_apis::CancelCallback DriveServiceOnWorker::GetAboutResource(
     const google_apis::AboutResourceCallback& callback) {
   ui_task_runner_->PostTask(
@@ -108,7 +107,6 @@ google_apis::CancelCallback DriveServiceOnWorker::GetAboutResource(
   return google_apis::CancelCallback();
 }
 
-
 google_apis::CancelCallback DriveServiceOnWorker::GetChangeList(
     int64 start_changestamp,
     const google_apis::ChangeListCallback& callback) {
@@ -233,10 +231,8 @@ google_apis::CancelCallback DriveServiceOnWorker::SearchByTitle(
 }
 
 bool DriveServiceOnWorker::HasRefreshToken() const {
-  // TODO(peria): Cache the state and returns it directly, before migration of
-  //    SyncWorker to a worker thread.
-  DCHECK(wrapper_);
-  return wrapper_->HasRefreshToken();
+  NOTREACHED();
+  return false;
 }
 
 void DriveServiceOnWorker::Initialize(const std::string& account_id) {