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
base::CancelableClosure window_unresposive_closure_;
  
  
  double sheet_offset_x_;
  double sheet_offset_y_;
  
  
  double aspect_ratio_;
  gfx::Size aspect_ratio_extraSize_;
  
  brightray::InspectableWebContents* inspectable_web_contents_;
  
  base::ObserverList<NativeWindowObserver> observers_;
  base::WeakPtrFactory<NativeWindow> weak_factory_;
  DISALLOW_COPY_AND_ASSIGN(NativeWindow);
};
class NativeWindowRelay :
    public content::WebContentsUserData<NativeWindowRelay> {
 public:
  explicit NativeWindowRelay(base::WeakPtr<NativeWindow> window)
    : key(UserDataKey()), window(window) {}
  void* key;
  base::WeakPtr<NativeWindow> window;
 private:
  friend class content::WebContentsUserData<NativeWindow>;
};
}  
#endif