- Electron version: 1.2.6
- Operating system: osx yosemite

Do the autoUpdater objects on osx and windows have different properties? On windows, when i do `console.log(JSON.stringify(autoUpdater));`
I see the properties `domain`, `_events`, `_eventsCount`, and `updateURL`. However, doing the same thing on osx only allows me to see the properties `_events` and `_eventsCount`. 

I want to access `updateURL` in my code but I'm wondering whether that property is accessible. Maybe I should submit a PR for a `getFeedURL` method?

atom/browser/api/atom_api_auto_updater.cc
const std::string& release_name,
                                     const base::Time& release_date,
                                     const std::string& url) {
  Emit("update-downloaded", release_notes, release_name, release_date, url,
       
       base::Bind(&AutoUpdater::QuitAndInstall, base::Unretained(this)));
}
void AutoUpdater::OnWindowAllClosed() {
  QuitAndInstall();
}
void AutoUpdater::SetFeedURL(const std::string& url, mate::Arguments* args) {
  auto_updater::AutoUpdater::HeaderMap headers;
  args->GetNext(&headers);
  auto_updater::AutoUpdater::SetFeedURL(url, headers);
}
void AutoUpdater::QuitAndInstall() {
  
  WindowList* window_list = WindowList::GetInstance();
  if (window_list->size() == 0) {
    auto_updater::AutoUpdater::QuitAndInstall();
    return;
  }
  
  window_list->AddObserver(this);
  for (NativeWindow* window : *window_list)
    window->Close();
}
mate::Handle<AutoUpdater> AutoUpdater::Create(v8::Isolate* isolate) {