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_mac.h
#ifndef ATOM_BROWSER_NATIVE_WINDOW_MAC_H_
#define ATOM_BROWSER_NATIVE_WINDOW_MAC_H_
#import <Cocoa/Cocoa.h>
#include <string>
#include <vector>
#include "base/mac/scoped_nsobject.h"
#include "atom/browser/native_window.h"
@class AtomNSWindow;