AppCache: fix a browser crashing bug that can happen during updates.

BUG=558589

Review URL: https://codereview.chromium.org/1463463003

Cr-Commit-Position: refs/heads/master@{#360967}
void AppCacheUpdateJob::NotifyAllError(const AppCacheErrorDetails& details) {
  HostNotifier host_notifier;
  AddAllAssociatedHostsToNotifier(&host_notifier);
  host_notifier.SendErrorNotifications(details);
}

void AppCacheUpdateJob::NotifyAllError(const AppCacheErrorDetails& details) {
  HostNotifier host_notifier;
  AddAllAssociatedHostsToNotifier(&host_notifier);
  host_notifier.SendErrorNotifications(details);
}
