* **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
return weak_map_id();
}
void TopLevelWindow::ResetBrowserViews() {
  for (auto& item : browser_views_) {
    mate::Handle<BrowserView> browser_view;
    if (mate::ConvertFromV8(isolate(),
                            v8::Local<v8::Value>::New(isolate(), item.second),
                            &browser_view) &&
        !browser_view.IsEmpty()) {
      window_->RemoveBrowserView(browser_view->view());
      browser_view->web_contents()->SetOwnerWindow(nullptr);
    }
    item.second.Reset();
  }
  browser_views_.clear();
}
void TopLevelWindow::RemoveFromParentChildWindows() {