void OutOfProcessInstance::IsSelectingChanged(bool is_selecting) {
  pp::VarDictionary message;
  message.Set(kType, kJSSetIsSelectingType);
  message.Set(kJSIsSelecting, pp::Var(is_selecting));
  PostMessage(message);
}

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.