* 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
extensions::EnsureBrowserContextKeyedServiceFactoriesBuilt();
  extensions::electron::EnsureBrowserContextKeyedServiceFactoriesBuilt();
#endif
#if BUILDFLAG(ENABLE_BUILTIN_SPELLCHECKER)
  SpellcheckServiceFactory::GetInstance();
#endif
#if defined(USE_X11)
  if (!features::IsUsingOzonePlatform())
    ui::TouchFactory::SetTouchDeviceListFromCommandLine();
#endif
  content::WebUIControllerFactory::RegisterFactory(
      ElectronWebUIControllerFactory::GetInstance());
  auto* command_line = base::CommandLine::ForCurrentProcess();
  if (command_line->HasSwitch(switches::kRemoteDebuggingPipe)) {
    
    content::DevToolsAgentHost::StartRemoteDebuggingPipeHandler(
        base::OnceClosure());
  } else if (command_line->HasSwitch(switches::kRemoteDebuggingPort)) {
    
    DevToolsManagerDelegate::StartHttpHandler();
  }
#if !defined(OS_MAC)
  
  Browser::Get()->WillFinishLaunching();
  Browser::Get()->DidFinishLaunching(base::DictionaryValue());
#endif
  
  Browser::Get()->PreMainMessageLoopRun();
}
bool ElectronBrowserMainParts::MainMessageLoopRun(int* result_code) {