### 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

13.1.0

### What operating system are you using?

macOS

### Operating System Version

macOS Big Sur 11.2.3 (20D91)

### What arch are you using?

x64

### Last Known Working Electron version

12.0.10

### Expected Behavior

![image](https://user-images.githubusercontent.com/19370201/120759983-2d1a1a00-c546-11eb-934e-33114a678193.png)


### Actual Behavior

![image](https://user-images.githubusercontent.com/19370201/120760015-37d4af00-c546-11eb-9bf2-acbd0566fa2d.png)


### Testcase Gist URL

_No response_

### Additional Information

```js
const { app, BrowserWindow, BrowserView } = require('electron')

function createWindow () {
    const win = new BrowserWindow({ width: 300, height: 300, titleBarStyle: 'hidden' })
    const view = new BrowserView()
    win.addBrowserView(view)
    view.setBounds({ x: 0, y: 0, width: 300, height: 40 })
    view.setBackgroundColor('#000000')
    win.loadFile('index.html')
}

app.whenReady().then(() => {
    createWindow()
})
```
shell/browser/native_window_mac.h
bool IsFocusable() override;
  void AddBrowserView(NativeBrowserView* browser_view) override;
  void RemoveBrowserView(NativeBrowserView* browser_view) override;
  void SetTopBrowserView(NativeBrowserView* browser_view) override;
  void SetParentWindow(NativeWindow* parent) override;
  content::DesktopMediaID GetDesktopMediaID() const override;
  gfx::NativeView GetNativeView() const override;
  gfx::NativeWindow GetNativeWindow() const override;
  gfx::AcceleratedWidget GetAcceleratedWidget() const override;
  NativeWindowHandle GetNativeWindowHandle() const override;
  void SetProgressBar(double progress, const ProgressState state) override;
  void SetOverlayIcon(const gfx::Image& overlay,
                      const std::string& description) override;
  void SetVisibleOnAllWorkspaces(bool visible,
                                 bool visibleOnFullScreen,
                                 bool skipTransformProcessType) override;
  bool IsVisibleOnAllWorkspaces() override;
  void SetAutoHideCursor(bool auto_hide) override;
  void SetVibrancy(const std::string& type) override;
  void SetWindowButtonVisibility(bool visible) override;
  bool GetWindowButtonVisibility() const override;
  void SetTrafficLightPosition(absl::optional<gfx::Point> position) override;
  absl::optional<gfx::Point> GetTrafficLightPosition() const override;
  void RedrawTrafficLights() override;
  void UpdateFrame() override;
  void SetTouchBar(
      std::vector<gin_helper::PersistentDictionary> items) override;
  void RefreshTouchBarItem(const std::string& item_id) override;
  void SetEscapeTouchBarItem(gin_helper::PersistentDictionary item) override;
  void SelectPreviousTab() override;