- Electron version: 0.37.5
- Operating system: Windows 10

When calling a window's `webContents.downloadURL(URL)` method if the specified URL returns a 404 the `will-download` event on `webContents.session` does not fire and instead a dialog pops up asking the user to save an html file (the contents of the 404 page).

Is this expected behavior and is there any event I can listen to or some other way to get around this? I'd like to handle the error differently if possible.

Thanks

atom/browser/atom_download_manager_delegate.cc
if (download_manager_) {
    DCHECK_EQ(static_cast<content::DownloadManagerDelegate*>(this),
              download_manager_->GetDelegate());
    download_manager_->SetDelegate(nullptr);
    download_manager_ = nullptr;
  }
}
void AtomDownloadManagerDelegate::CreateDownloadPath(
    const GURL& url,
    const std::string& content_disposition,
    const std::string& suggested_filename,
    const std::string& mime_type,
    const base::FilePath& default_download_path,
    const CreateDownloadPathCallback& callback) {
  DCHECK_CURRENTLY_ON(content::BrowserThread::FILE);
  auto generated_name = net::GenerateFileName(url,
                                              content_disposition,
                                              std::string(),
                                              suggested_filename,
                                              mime_type,
                                              std::string());
  if (!base::PathExists(default_download_path))
    base::CreateDirectory(default_download_path);
  base::FilePath path(default_download_path.Append(generated_name));
  content::BrowserThread::PostTask(content::BrowserThread::UI, FROM_HERE,
                                   base::Bind(callback, path));
}
void AtomDownloadManagerDelegate::OnDownloadPathGenerated(