Add an option to specify requested fields for fetching metadata.

chrome/browser/chromeos/fileapi/external_file_url_request_job.cc

Index: chrome/browser/chromeos/fileapi/external_file_url_request_job.cc
diff --git a/chrome/browser/chromeos/fileapi/external_file_url_request_job.cc b/chrome/browser/chromeos/fileapi/external_file_url_request_job.cc
index c714b609c55c41e107f4fd7dda0a33b9553a54e5..676e356be7aed891b1dec0e42b39ae4c07dae752 100644
--- a/chrome/browser/chromeos/fileapi/external_file_url_request_job.cc
+++ b/chrome/browser/chromeos/fileapi/external_file_url_request_job.cc
@@ -250,6 +250,8 @@ void ExternalFileURLRequestJob::OnRedirectURLObtained(
   // Obtain file system context.
   file_system_context_->operation_runner()->GetMetadata(
       file_system_url_,
+      storage::FileSystemOperation::GET_METADATA_FIELD_IS_DIRECTORY |
+          storage::FileSystemOperation::GET_METADATA_FIELD_SIZE,
       base::Bind(&ExternalFileURLRequestJob::OnFileInfoObtained,
                  weak_ptr_factory_.GetWeakPtr()));
 }