### 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
#include "ui/aura/window_tree_host.h"
#include "ui/base/hit_test.h"
#include "ui/gfx/image/image.h"
#include "ui/gfx/native_widget_types.h"
#include "ui/views/background.h"
#include "ui/views/controls/webview/unhandled_keyboard_event_handler.h"
#include "ui/views/controls/webview/webview.h"
#include "ui/views/widget/native_widget_private.h"
#include "ui/views/widget/widget.h"
#include "ui/views/window/client_view.h"
#include "ui/wm/core/shadow_types.h"
#include "ui/wm/core/window_util.h"
#if defined(OS_LINUX)
#include "base/strings/string_util.h"
#include "shell/browser/browser.h"
#include "shell/browser/linux/unity_service.h"
#include "shell/browser/ui/views/frameless_view.h"
#include "shell/browser/ui/views/native_frame_view.h"
#include "ui/views/widget/desktop_aura/desktop_window_tree_host_linux.h"
#include "ui/views/window/native_frame_view.h"
#if defined(USE_X11)
#include "shell/browser/ui/views/global_menu_bar_x11.h"
#include "shell/browser/ui/x/event_disabler.h"
#include "shell/browser/ui/x/window_state_watcher.h"
#include "shell/browser/ui/x/x_window_utils.h"
#include "ui/base/x/x11_util.h"
#include "ui/gfx/x/shape.h"
#include "ui/gfx/x/x11_atom_cache.h"
#include "ui/gfx/x/xproto.h"
#include "ui/gfx/x/xproto_util.h"