### 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.

### Problem Description

We need to load a custom error page when the certificate is invalid but without "isMainFrame" property we don't know when to load the custom error page using webContents.loadURL()

### Proposed Solution

webContents.on("certificate-error", ((event, url, error, certificate, callback, isMainFrame)

### Alternatives Considered

Not sure

### Additional Information

Not sure
shell/browser/api/electron_api_app.cc
Browser::Get()->DockSetMenu(menu->model());
}
v8::Local<v8::Value> App::GetDockAPI(v8::Isolate* isolate) {
  if (dock_.IsEmpty()) {
    
    
    auto browser = base::Unretained(Browser::Get());
    gin_helper::Dictionary dock_obj = gin::Dictionary::CreateEmpty(isolate);
    dock_obj.SetMethod("bounce", &DockBounce);
    dock_obj.SetMethod(
        "cancelBounce",
        base::BindRepeating(&Browser::DockCancelBounce, browser));
    dock_obj.SetMethod(
        "downloadFinished",
        base::BindRepeating(&Browser::DockDownloadFinished, browser));
    dock_obj.SetMethod(
        "setBadge", base::BindRepeating(&Browser::DockSetBadgeText, browser));
    dock_obj.SetMethod(
        "getBadge", base::BindRepeating(&Browser::DockGetBadgeText, browser));
    dock_obj.SetMethod("hide",
                       base::BindRepeating(&Browser::DockHide, browser));
    dock_obj.SetMethod("show",
                       base::BindRepeating(&Browser::DockShow, browser));
    dock_obj.SetMethod("isVisible",
                       base::BindRepeating(&Browser::DockIsVisible, browser));
    dock_obj.SetMethod("setMenu", &DockSetMenu);
    dock_obj.SetMethod("setIcon",
                       base::BindRepeating(&Browser::DockSetIcon, browser));
    dock_.Reset(isolate, dock_obj.GetHandle());
  }