* 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
for (NativeWindowObserver& observer : observers_)
    observer.OnWindowBlur();
}
void NativeWindow::NotifyWindowFocus() {
  for (NativeWindowObserver& observer : observers_)
    observer.OnWindowFocus();
}
void NativeWindow::NotifyWindowShow() {
  for (NativeWindowObserver& observer : observers_)
    observer.OnWindowShow();
}
void NativeWindow::NotifyWindowHide() {
  for (NativeWindowObserver& observer : observers_)
    observer.OnWindowHide();
}
void NativeWindow::NotifyWindowMaximize() {
  for (NativeWindowObserver& observer : observers_)
    observer.OnWindowMaximize();
}
void NativeWindow::NotifyWindowUnmaximize() {
  for (NativeWindowObserver& observer : observers_)
    observer.OnWindowUnmaximize();
}
void NativeWindow::NotifyWindowMinimize() {
  for (NativeWindowObserver& observer : observers_)
    observer.OnWindowMinimize();
}
void NativeWindow::NotifyWindowRestore() {