[fsp] Do not close files which failed to open for reading and writing.

chrome/browser/chromeos/file_system_provider/fileapi/file_stream_reader.cc

Index: chrome/browser/chromeos/file_system_provider/fileapi/file_stream_reader.cc
diff --git a/chrome/browser/chromeos/file_system_provider/fileapi/file_stream_reader.cc b/chrome/browser/chromeos/file_system_provider/fileapi/file_stream_reader.cc
index b8f13321432694f833a5e30a425c3e5733e6909a..111316576eca0fa7a61ce507adca4ae07996ae02 100644
--- a/chrome/browser/chromeos/file_system_provider/fileapi/file_stream_reader.cc
+++ b/chrome/browser/chromeos/file_system_provider/fileapi/file_stream_reader.cc
@@ -161,7 +161,9 @@ class FileStreamReader::OperationRunner
       base::File::Error result) {
     DCHECK_CURRENTLY_ON(BrowserThread::UI);
 
-    file_handle_ = file_handle;
+    if (result == base::File::FILE_OK)
+      file_handle_ = file_handle;
+
     BrowserThread::PostTask(
         BrowserThread::IO, FROM_HERE, base::Bind(callback, result));
   }