The initial version of https://crrev.com/c/621873 contains:
  
    net_error_ = result.net_error_code();
    ...

    if (net::ERR_ABORTED == net_error_) {
      frame_tree_node_->ResetNavigationRequest(false, true);
      return;
    }

However, we may want to change the behaviour based on result.action(). In particular, the documentation for CANCEL_AND_IGNORE says "act like the request was never made" [1], which suggests that we should also reset the navigation request (instead of committing the error page) for that action.

Arguably, it also makes sense to allow throttles to cancel a committed navigation with a result of net::ERR_ABORTED.

[1] https://cs.chromium.org/chromium/src/content/public/browser/navigation_throttle.h?l=34&rcl=835f294f50b4c64329c2021b141be3f45b4df338