### Preflight Checklist

- [X] I have read the [Contributing Guidelines](https://github.com/electron/electron/blob/main/CONTRIBUTING.md) for this project.
- [X] I agree to follow the [Code of Conduct](https://github.com/electron/electron/blob/main/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 bug report that matches the one I want to file, without success.

### Electron Version

17.0.0

### What operating system are you using?

Windows

### Operating System Version

Windows 10 Version 21H1

### What arch are you using?

x64

### Last Known Working Electron version

14.2.3

### Expected Behavior

background should transparent if background is #00000000

### Actual Behavior

has a white background

### Testcase Gist URL

_No response_

### Additional Information

_No response_
shell/browser/api/electron_api_web_contents.cc
electron::api::WebContents::Type val) {
    using Type = electron::api::WebContents::Type;
    std::string type;
    switch (val) {
      case Type::kBackgroundPage:
        type = "backgroundPage";
        break;
      case Type::kBrowserWindow:
        type = "window";
        break;
      case Type::kBrowserView:
        type = "browserView";
        break;
      case Type::kRemote:
        type = "remote";
        break;
      case Type::kWebView:
        type = "webview";
        break;
      case Type::kOffScreen:
        type = "offscreen";
        break;
      default:
        break;
    }
    return gin::ConvertToV8(isolate, type);
  }
  static bool FromV8(v8::Isolate* isolate,