void RenderWidgetHostImpl::LostFocus() {
  Blur();
  if (owner_delegate_)
    owner_delegate_->RenderWidgetLostFocus();
  if (delegate_)
    delegate_->RenderWidgetLostFocus(this);
}

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.