* Electron version: 1.4.14
* Operating system: Windows

Hi!
I faced with issue described in this two comments: 
https://github.com/electron/electron/issues/6388#issuecomment-236498471
https://github.com/electron/electron/issues/6388#issuecomment-244483403
The main issue is fixed, but the session is lost if the app is closed immediately after login and setting the cookie.

### Expected behavior
Cookie should be saved.

### Actual behavior
When the app is closed after less then 10-15 seconds a cookie is set, it is not saved when the app is reopened. 

atom/browser/api/atom_api_cookies.cc
#include "atom/browser/api/atom_api_cookies.h"
#include "atom/browser/atom_browser_context.h"
#include "atom/common/native_mate_converters/callback.h"
#include "atom/common/native_mate_converters/gurl_converter.h"
#include "atom/common/native_mate_converters/value_converter.h"
#include "base/time/time.h"
#include "base/values.h"
#include "content/public/browser/browser_context.h"
#include "content/public/browser/browser_thread.h"
#include "native_mate/dictionary.h"
#include "native_mate/object_template_builder.h"
#include "net/cookies/cookie_monster.h"
#include "net/cookies/cookie_store.h"
#include "net/cookies/cookie_util.h"
#include "net/url_request/url_request_context.h"
#include "net/url_request/url_request_context_getter.h"
using atom::AtomCookieDelegate;
using content::BrowserThread;
namespace mate {
template<>
struct Converter<atom::api::Cookies::Error> {
  static v8::Local<v8::Value> ToV8(v8::Isolate* isolate,