void OmniboxEditModel::OnWillKillFocus(gfx::NativeView view_gaining_focus) {
  if (user_input_in_progress_ || !in_revert_)
    delegate_->OnInputStateChanged();
}

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.