### 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
content::RenderFrame* render_frame,
    const blink::WebElement& plugin_element,
    const GURL& original_url,
    const std::string& mime_type) {
#if BUILDFLAG(ENABLE_PDF_VIEWER)
  DCHECK(plugin_element.HasHTMLTagName("object") ||
         plugin_element.HasHTMLTagName("embed"));
  
  
  content::WebPluginInfo info;
  info.type = content::WebPluginInfo::PLUGIN_TYPE_BROWSER_PLUGIN;
  info.name = base::UTF8ToUTF16("Chromium PDF Viewer");
  info.path = base::FilePath::FromUTF8Unsafe(extension_misc::kPdfExtensionId);
  info.background_color = content::WebPluginInfo::kDefaultBackgroundColor;
  info.mime_types.emplace_back("application/pdf", "pdf",
                               "Portable Document Format");
  return extensions::MimeHandlerViewContainerManager::Get(
             content::RenderFrame::FromWebFrame(
                 plugin_element.GetDocument().GetFrame()),
             true )
      ->CreateFrameContainer(plugin_element, original_url, mime_type, info);
#else
  return false;
#endif
}
bool RendererClientBase::IsOriginIsolatedPepperPlugin(