void ResourceDispatcherHostImpl::CancelTransferringNavigation(
    const GlobalRequestID& id) {
  DCHECK(IsTransferredNavigation(id));
  RemovePendingRequest(id.child_id, id.request_id);
}

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.