bool ConsoleObserverDelegate::DidAddMessageToConsole(
    WebContents* source,
    int32_t level,
    const base::string16& message,
    int32_t line_no,
    const base::string16& source_id) {
  DCHECK(source == web_contents_);

  std::string ascii_message = base::UTF16ToASCII(message);
  if (base::MatchPattern(ascii_message, filter_)) {
    message_ = ascii_message;
    message_loop_runner_->Quit();
  }
  return false;
}

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.