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### Issue Details
BrowserWindow method `removeMenu()` is not working on v7.1.1. The only change made was upgrading Electron version.
https://electronjs.org/docs/api/browser-window#winremovemenu-linux-windows

* **Electron Version:**
  * 7.1.1
* **Operating System:**
  * Windows 10 (1903)
* **Last Known Working Electron version:**
  * v6.0.3

### Expected Behavior
Menu Bar not visible.<!-- A clear and concise description of what you expected to happen. -->

### Actual Behavior
Menu Bar is visible.<!-- A clear and concise description of what actually happened. -->

### To Reproduce
For me, just update Electron version.

### Screenshots
With version 7.1.1:
![image](https://user-images.githubusercontent.com/11201504/68656003-c5d5e880-050f-11ea-8d22-dfd58d166762.png)

With version 6.0.3:
![image](https://user-images.githubusercontent.com/11201504/68656185-1baa9080-0510-11ea-9033-bec7554f4b40.png)

shell/browser/native_window_views.cc
if (GetNativeWindow() && GetNativeWindow()->GetHost())
    return GetNativeWindow()->GetHost()->GetAcceleratedWidget();
  else
    return gfx::kNullAcceleratedWidget;
}
NativeWindowHandle NativeWindowViews::GetNativeWindowHandle() const {
  return GetAcceleratedWidget();
}
gfx::Rect NativeWindowViews::ContentBoundsToWindowBounds(
    const gfx::Rect& bounds) const {
  if (!has_frame())
    return bounds;
  gfx::Rect window_bounds(bounds);
#if defined(OS_WIN)
  if (widget()->non_client_view()) {
    HWND hwnd = GetAcceleratedWidget();
    gfx::Rect dpi_bounds = DIPToScreenRect(hwnd, bounds);
    window_bounds = ScreenToDIPRect(
        hwnd, widget()->non_client_view()->GetWindowBoundsForClientBounds(
                  dpi_bounds));
  }
#endif
  if (root_view_->HasMenu() && root_view_->IsMenuBarVisible()) {
    int menu_bar_height = root_view_->GetMenuBarHeight();
    window_bounds.set_y(window_bounds.y() - menu_bar_height);
    window_bounds.set_height(window_bounds.height() + menu_bar_height);
  }
  return window_bounds;
}
gfx::Rect NativeWindowViews::WindowBoundsToContentBounds(