* Electron version: 8.0.0
* Operating system: Linux - Fedora 31 - Kernel 5.4.13-201.fc31.x86_64

### Expected behavior
The local store should persist items even though the app is terminated as soon as the item was added.

### Actual behavior
If the app is terminated in less than 2 seconds after an item is added to local storage, the value is not available after the app is reopened.

### How to reproduce
1. Create a new electron app 
(I used the quick start from the website git clone https://github.com/electron/electron-quick-start)

0. Run the app using `npm start`

0. Run a JavaScript code that adds a new key/value pair to localStorage
````
localStorage.setItem("my-key", "my-value")
````

0. Within 3 seconds, terminate the app (killing the process or pressing Ctrl + C)
NOTE: If the app is closed properly (pressing Alt + F4 or click on the "X"), this issue does not occur.

0. Run the app again

0. Check for the localStorage items
````
localStorage.getItem("my-key")
````
Or in the Application tab from Developer Tools.

Both cases are not available neither the key nor the value
shell/browser/electron_browser_main_parts.cc
}
#endif
  
  std::string loaded_locale = LoadResourceBundle(locale);
  
  std::string app_locale = l10n_util::GetApplicationLocale(loaded_locale);
  ElectronBrowserClient::SetApplicationLocale(app_locale);
  fake_browser_process_->SetApplicationLocale(app_locale);
#if defined(OS_LINUX)
  
  if (!locale.empty()) {
    if (lc_all)
      env->SetVar("LC_ALL", *lc_all);
    else
      env->UnSetVar("LC_ALL");
  }
#endif
  
  MediaCaptureDevicesDispatcher::GetInstance();
  
  MediaCaptureDevicesDispatcher::GetInstance();
#if defined(OS_MAC)
  ui::InitIdleMonitor();
#endif
  fake_browser_process_->PreCreateThreads();
  
  Browser::Get()->PreCreateThreads();
  return 0;
}
void ElectronBrowserMainParts::PostCreateThreads() {