Flush at the end of local file writing in FileWriter API.

webkit/chromeos/fileapi/remote_file_stream_writer.cc

Index: webkit/chromeos/fileapi/remote_file_stream_writer.cc
diff --git a/webkit/chromeos/fileapi/remote_file_stream_writer.cc b/webkit/chromeos/fileapi/remote_file_stream_writer.cc
index fd9ab532c4c776900dfa7868c9b6c87b682ae94f..187a79aabb0bc6071e21255e124951de46d4d6e6 100644
--- a/webkit/chromeos/fileapi/remote_file_stream_writer.cc
+++ b/webkit/chromeos/fileapi/remote_file_stream_writer.cc
@@ -104,6 +104,12 @@ int RemoteFileStreamWriter::Cancel(const net::CompletionCallback& callback) {
   return net::ERR_UNEXPECTED;
 }
 
+int RemoteFileStreamWriter::Flush(const net::CompletionCallback& callback) {
+  // For remote file writer, Flush() is a no-op. Synchronization to the remote
+  // server is not done until the file is closed.
+  return net::OK;
+}
+
 void RemoteFileStreamWriter::InvokePendingCancelCallback(int result) {
   net::CompletionCallback callback = pending_cancel_callback_;
   pending_cancel_callback_.Reset();