* Electron Version: v2.0.1
* Operating System (Platform and Version): windows10
* Last known working Electron version: 1.7.9

Allow frameless transparent windows to be sized smaller than 64x64 on Windows #12923

but，now, it can't bigger than 64x64 on Windows
my `height/width` don't work
when i set `frame: true`, it can't resize
remove `transparent: true`, all work right
![2018-05-18 11_14_17](https://user-images.githubusercontent.com/12164900/40214332-aac2815e-5a8c-11e8-8aa1-38ec2a427e0a.gif)

atom/browser/native_window.cc
const std::string& item_id,
    const base::DictionaryValue& details) {
  for (NativeWindowObserver& observer : observers_)
    observer.OnTouchBarItemResult(item_id, details);
}
void NativeWindow::NotifyNewWindowForTab() {
  for (NativeWindowObserver& observer : observers_)
    observer.OnNewWindowForTab();
}
#if defined(OS_WIN)
void NativeWindow::NotifyWindowMessage(UINT message,
                                       WPARAM w_param,
                                       LPARAM l_param) {
  for (NativeWindowObserver& observer : observers_)
    observer.OnWindowMessage(message, w_param, l_param);
}
#endif
views::Widget* NativeWindow::GetWidget() {
  return widget();
}
const views::Widget* NativeWindow::GetWidget() const {
  return widget();
}
NativeWindowRelay::NativeWindowRelay(base::WeakPtr<NativeWindow> window)
    : key(UserDataKey()), window(window) {}
NativeWindowRelay::~NativeWindowRelay() = default;
}