* **Electron Version:**
  4.0.2
* **Operating System:**
  macOS 10.14.3
* **Last Known Working Electron version:**:
  1.7

### Expected Behavior
When creating a BrowserWindow it should not appear in the dock menu by defaults.

### Actual Behavior
It appears in the dock menu (example: `raven` in https://electronjs.org/docs/tutorial/macos-dock)

### To Reproduce
Just create new BrowserWindow, then right click on the app icon in the dock. (see https://electronjs.org/docs/tutorial/macos-dock)

At least it should be a way to control that, this can be achieve for top level window with:
`[window_ setExcludedFromWindowsMenu:YES];`, indeed [window isExcludedFromWindowsMenu] returns false by default, see

https://developer.apple.com/documentation/appkit/nsapplication/1428625-removewindowsitem
`Use the isExcludedFromWindowsMenu method of NSWindow if you want the item to remain excluded from the Window menu.`
https://developer.apple.com/documentation/appkit/nswindow/1419175-isexcludedfromwindowsmenu

atom/browser/api/atom_api_top_level_window.cc
const mate::PersistentDictionary& item) {
  window_->SetEscapeTouchBarItem(item);
}
void TopLevelWindow::SelectPreviousTab() {
  window_->SelectPreviousTab();
}
void TopLevelWindow::SelectNextTab() {
  window_->SelectNextTab();
}
void TopLevelWindow::MergeAllWindows() {
  window_->MergeAllWindows();
}
void TopLevelWindow::MoveTabToNewWindow() {
  window_->MoveTabToNewWindow();
}
void TopLevelWindow::ToggleTabBar() {
  window_->ToggleTabBar();
}
void TopLevelWindow::AddTabbedWindow(NativeWindow* window,
                                     mate::Arguments* args) {
  if (!window_->AddTabbedWindow(window))
    args->ThrowError("AddTabbedWindow cannot be called by a window on itself.");
}
void TopLevelWindow::SetWindowButtonVisibility(bool visible,
                                               mate::Arguments* args) {
  if (!window_->SetWindowButtonVisibility(visible)) {
    args->ThrowError("Not supported for this window");
  }
}
void TopLevelWindow::SetAutoHideMenuBar(bool auto_hide) {