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### Issue Details
This is a bug report specifically for the 7.0 beta. 

* **Electron Version:**
  * 7.0.0-beta.6
* **Operating System:**
  * Ubuntu 18.04 x64, Windows 10
* **Last Known Working Electron version:**
  * 6.0.12

### Expected Behavior
SharedWorker should be functional and *shared* when using
  a custom protocol to provide a proper origin.

### Actual Behavior
SharedWorker does not execute when loaded from custom protocol.
It does execute when page is loaded with the `file://` protocol, but this 
  defeats the purpose, since it is not shared between contexts.

Also noticed while diagnosing the issue:
Creating a SharedWorker with node integration enabled using a Data URL crashes 
the renderer.  I verified that this works in Electron 6, figured the cause might be related.

### To Reproduce
Install and run the following repo:

https://github.com/krisdages/electron-7-shared-worker-broken

$ git clone https://github.com/krisdages/electron-7-shared-worker-broken
$ npm install
$ npm start

Sorry, had it implemented before seeing the "electron fiddle" option. May try that next time.

Thanks for looking into this :)
shell/browser/electron_browser_client.cc
auto proxied_receiver = std::move(*factory_receiver);
  mojo::PendingRemote<network::mojom::URLLoaderFactory> target_factory_remote;
  *factory_receiver = target_factory_remote.InitWithNewPipeAndPassReceiver();
  
  
  
  
  
  std::unique_ptr<extensions::ExtensionNavigationUIData> navigation_ui_data;
  if (navigation_id.has_value()) {
    navigation_ui_data =
        std::make_unique<extensions::ExtensionNavigationUIData>();
  }
  mojo::PendingReceiver<network::mojom::TrustedURLLoaderHeaderClient>
      header_client_receiver;
  if (header_client)
    header_client_receiver = header_client->InitWithNewPipeAndPassReceiver();
  auto* protocol_registry =
      ProtocolRegistry::FromBrowserContext(browser_context);
  new ProxyingURLLoaderFactory(
      web_request.get(), protocol_registry->intercept_handlers(),
      browser_context, render_process_id, &next_id_,
      std::move(navigation_ui_data), std::move(navigation_id),
      std::move(proxied_receiver), std::move(target_factory_remote),
      std::move(header_client_receiver), type);
  if (bypass_redirect_checks)
    *bypass_redirect_checks = true;
  return true;
}
void ElectronBrowserClient::OverrideURLLoaderFactoryParams(