### Preflight Checklist

- [X] I have read the [Contributing Guidelines](https://github.com/electron/electron/blob/master/CONTRIBUTING.md) for this project.
- [X] I agree to follow the [Code of Conduct](https://github.com/electron/electron/blob/master/CODE_OF_CONDUCT.md) that this project adheres to.
- [X] I have searched the [issue tracker](https://www.github.com/electron/electron/issues) for a feature request that matches the one I want to file, without success.

### Electron Version

12.0.1

### What operating system are you using?

Windows

### Operating System Version

Windows 10 Pro 2020

### What arch are you using?

x64

### Last Known Working Electron version

11.3.0

### Expected Behavior

The app works perfectly fine with an embedded video player.

### Actual Behavior

The app crashes when creating an element with an embedded video player.

### Testcase Gist URL

https://github.com/pavladan/mpv.js-on-react

Change the version of electron to 12.0.1 to see the crash, 11.3.0 works perfectly fine.

Note: In order to see the crash on 12.0.1, adjustments to the settings must be made
```
const win = new BrowserWindow({
    width: 1280,
    height: 574,
    autoHideMenuBar: true,
    useContentSize: process.platform !== "linux",
    title: "mpv.js example player",
    webPreferences: {
      nodeIntegration: true,
      plugins: true,
      enableRemoteModule: true,
      nodeIntegrationInSubFrames: true,
      contextIsolation: false,
      worldSafeExecuteJavaScript: false
    },
  });
```

shell/renderer/renderer_client_base.cc
blink::WebString::FromASCII(scheme));
  std::vector<std::string> csp_bypassing_schemes =
      ParseSchemesCLISwitch(command_line, switches::kBypassCSPSchemes);
  for (const std::string& scheme : csp_bypassing_schemes)
    blink::SchemeRegistry::RegisterURLSchemeAsBypassingContentSecurityPolicy(
        WTF::String::FromUTF8(scheme.data(), scheme.length()));
  
  
  blink::WebSecurityPolicy::RegisterURLSchemeAsAllowingServiceWorkers("file");
  blink::SchemeRegistry::RegisterURLSchemeAsSupportingFetchAPI("file");
#if defined(OS_WIN)
  
  base::string16 app_id =
      command_line->GetSwitchValueNative(switches::kAppUserModelId);
  if (!app_id.empty()) {
    SetCurrentProcessExplicitAppUserModelID(app_id.c_str());
  }
#endif
}
void RendererClientBase::ExposeInterfacesToBrowser(mojo::BinderMap* binders) {
  
  
  
  ExposeElectronRendererInterfacesToBrowser(this, binders);
}
void RendererClientBase::RenderFrameCreated(
    content::RenderFrame* render_frame) {
#if defined(TOOLKIT_VIEWS)
  new AutofillAgent(render_frame,
                    render_frame->GetAssociatedInterfaceRegistry());