Keep sync tasks alive as long as it's not finished

chrome/browser/chromeos/drive/file_errors.cc

Index: chrome/browser/chromeos/drive/file_errors.cc
diff --git a/chrome/browser/chromeos/drive/file_errors.cc b/chrome/browser/chromeos/drive/file_errors.cc
index 5533f63bc291e7efcbdab013d133d537663be30a..04ec13db10969b88dcf26f9105053f30f3c44531 100644
--- a/chrome/browser/chromeos/drive/file_errors.cc
+++ b/chrome/browser/chromeos/drive/file_errors.cc
@@ -66,6 +66,9 @@ std::string FileErrorToString(FileError error) {
 
     case FILE_ERROR_SERVICE_UNAVAILABLE:
       return "FILE_ERROR_SERVICE_UNAVAILABLE";
+
+    case FILE_ERROR_PARENT_NEEDS_TO_BE_SYNCED:
+      return "FILE_ERROR_PARENT_NEEDS_TO_BE_SYNCED";
   }
 
   NOTREACHED();
@@ -130,6 +133,9 @@ base::File::Error FileErrorToBaseFileError(FileError error) {
 
     case FILE_ERROR_SERVICE_UNAVAILABLE:
       return base::File::FILE_ERROR_FAILED;
+
+    case FILE_ERROR_PARENT_NEEDS_TO_BE_SYNCED:
+      return base::File::FILE_ERROR_FAILED;
   }
 
   NOTREACHED();