Dragging any border of a window with `setAspectRatio` does not make the window larger. But it works if you want to make window smaller.

Steps to reproduce:
1) `git clone https://github.com/electron/electron-quick-start`
2) add `mainWindow.setAspectRatio(16/9)`

Result:
![may-04-2016 22-43-17](https://cloud.githubusercontent.com/assets/313152/15027045/40944fba-124a-11e6-8528-472d956d2317.gif)
- Electron version: 0.37.8
- Operating system: OS X 10.11.3

atom/browser/native_window.h
public content::WebContentsObserver {
 public:
  using CapturePageCallback = base::Callback<void(const SkBitmap& bitmap)>;
  class DialogScope {
   public:
    explicit DialogScope(NativeWindow* window)
        : window_(window) {
      if (window_ != NULL)
        window_->set_has_dialog_attached(true);
    }
    ~DialogScope() {
      if (window_ != NULL)
        window_->set_has_dialog_attached(false);
    }
   private:
    NativeWindow* window_;
    DISALLOW_COPY_AND_ASSIGN(DialogScope);
  };
  virtual ~NativeWindow();
  
  
  static NativeWindow* Create(
      brightray::InspectableWebContents* inspectable_web_contents,
      const mate::Dictionary& options);
  
  static NativeWindow* FromWebContents(content::WebContents* web_contents);
  void InitFromOptions(const mate::Dictionary& options);
  virtual void Close() = 0;
  virtual void CloseImmediately() = 0;
  virtual bool IsClosed() const { return is_closed_; }