FTP: fix navigation to systems with broken EPSV support.

net/ftp/ftp_network_transaction.cc

Index: net/ftp/ftp_network_transaction.cc
diff --git a/net/ftp/ftp_network_transaction.cc b/net/ftp/ftp_network_transaction.cc
index f6b7203b0316fc52508cbf23bc4633ee218bd182..471e8c920842dbf45891ad4c9ab3fc3bb247a164 100644
--- a/net/ftp/ftp_network_transaction.cc
+++ b/net/ftp/ftp_network_transaction.cc
@@ -1187,7 +1187,22 @@ int FtpNetworkTransaction::DoDataConnect() {
 }
 
 int FtpNetworkTransaction::DoDataConnectComplete(int result) {
+  if (result == ERR_CONNECTION_TIMED_OUT && use_epsv_) {
+    // It's possible we hit a broken server, sadly. Fall back to PASV.
+    // TODO(phajdan.jr): remember it for future transactions with this server.
+    // TODO(phajdan.jr): write a test for this code path.
+    use_epsv_ = false;
+    next_state_ = STATE_CTRL_WRITE_PASV;
+    return OK;
+  }
+
+  // Only record the connection error after we've applied all our fallbacks.
+  // We want to capture the final error, one we're not going to recover from.
   RecordDataConnectionError(result);
+
+  if (result != OK)
+    return Stop(result);
+
   next_state_ = STATE_CTRL_WRITE_SIZE;
   return OK;
 }