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::NotifyAllFinalProgress() {
  DCHECK(url_file_list_.size() == url_fetches_completed_);
  NotifyAllProgress(GURL());
}

void AppCacheUpdateJob::NotifyAllFinalProgress() {
  DCHECK(url_file_list_.size() == url_fetches_completed_);
  NotifyAllProgress(GURL());
}
