Recommit r53882 "FTP: fix navigation to systems with broken EPSV support."i"

Original revert was an attempt to diagnose a build bustage, but this wasn't the cause.

Review URL: http://codereview.chromium.org/3012028

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@53931 0039d316-1c4b-4281-b951-d872f2087c98

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;
 }