### Issue Details
in frameless windows 
While setting browserview style to draggable by webkit-app-region : drag. the area won't be draggable after that
and it can not move main window 
### Electron Version:
11.0.1
### Operating System:
Windows 10 (1803)
Last Known Working Electron version:
not found
### Expected Behavior
Browser view moves the main window while I set the style of the body or one of the area to
-webkit-app-region: drag;

### Actual Behavior
nothing happen in browserview after styling -webkit-app-region: drag;

I know it is mention that in 11 version it is fixed. but it still dosn't work 

### To Reproduce
https://gist.github.com/pejmanpesyan/8540aad65e7c6980c45f23e5eaafafb9

shell/browser/native_window_views.cc
params.wm_class_name = base::ToLowerASCII(name);
  params.wm_class_class = name;
#endif
  widget()->Init(std::move(params));
  bool fullscreen = false;
  options.Get(options::kFullscreen, &fullscreen);
  std::string window_type;
  options.Get(options::kType, &window_type);
#if defined(USE_X11)
  if (!features::IsUsingOzonePlatform()) {
    
    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)
  if (!features::IsUsingOzonePlatform()) {
    
    
    std::vector<x11::Atom> state_atom_list;
    bool skip_taskbar = false;