bool OmniboxEditModel::CanPasteAndGo(const base::string16& text) const {
  if (!view_->command_updater()->IsCommandEnabled(IDC_OPEN_CURRENT_URL))
    return false;

  AutocompleteMatch match;
  ClassifyStringForPasteAndGo(text, &match, NULL);
  return match.destination_url.is_valid();
}

The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.