* 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.OnWindowSwipe(direction);
}
void NativeWindow::NotifyWindowSheetBegin() {
  for (NativeWindowObserver& observer : observers_)
    observer.OnWindowSheetBegin();
}
void NativeWindow::NotifyWindowSheetEnd() {
  for (NativeWindowObserver& observer : observers_)
    observer.OnWindowSheetEnd();
}
void NativeWindow::NotifyWindowLeaveFullScreen() {
  for (NativeWindowObserver& observer : observers_)
    observer.OnWindowLeaveFullScreen();
}
void NativeWindow::NotifyWindowEnterHtmlFullScreen() {
  for (NativeWindowObserver& observer : observers_)
    observer.OnWindowEnterHtmlFullScreen();
}
void NativeWindow::NotifyWindowLeaveHtmlFullScreen() {
  for (NativeWindowObserver& observer : observers_)
    observer.OnWindowLeaveHtmlFullScreen();
}
void NativeWindow::NotifyWindowExecuteWindowsCommand(
    const std::string& command) {
  for (NativeWindowObserver& observer : observers_)
    observer.OnExecuteWindowsCommand(command);
}
void NativeWindow::NotifyTouchBarItemInteraction(