### 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 feature request that matches the one I want to file, without success.

### Electron Version

15.2.0

### What operating system are you using?

Windows

### Operating System Version

Windows 10 version 20H2

### What arch are you using?

x64

### Last Known Working Electron version

15.1.2

### Expected Behavior

Apply `setContentProtection` function without any effects on the application window behavior on `browser-window-created` event.

### Actual Behavior

When `setContentProtection` function is called on `browser-window-created` event, the application window form will changed when the focus is backed.  The value of the argument of `setContentProtection` has no effect on the result.
![setContentProtectionIssue](https://user-images.githubusercontent.com/441950/140640295-ca25b82d-d36b-4101-b38e-b8def46bab3e.gif)



### Testcase Gist URL

https://gist.github.com/KazuyaHayashi/33372ae657dde602e68fdb50aabafa31

### Additional Information

When I call `setContentProtection` just after creating `BrowserWindow`, this issue does not happen. But I want to set contents protection on each windows which are created by `new-window` event. Therefor, I have called `setContentProtection` function on `browser-window-created` event.
shell/browser/native_window_views.cc
params.wm_class_class = name;
#endif
  widget()->Init(std::move(params));
  SetCanResize(resizable_);
  bool fullscreen = false;
  options.Get(options::kFullscreen, &fullscreen);
  std::string window_type;
  options.Get(options::kType, &window_type);
#if defined(USE_X11)
  
  window_state_watcher_ = std::make_unique<WindowStateWatcher>(this);
  
  bool use_dark_theme = false;
  if (options.Get(options::kDarkTheme, &use_dark_theme) && use_dark_theme) {
    SetGTKDarkThemeEnabled(use_dark_theme);
  }
#endif
#if defined(OS_LINUX)
  if (parent)
    SetParentWindow(parent);
#endif
#if defined(USE_X11)
  
  
  std::vector<x11::Atom> state_atom_list;
  bool skip_taskbar = false;
  if (options.Get(options::kSkipTaskbar, &skip_taskbar) && skip_taskbar) {
    state_atom_list.push_back(x11::GetAtom("_NET_WM_STATE_SKIP_TASKBAR"));
  }