* Electron version: 1.4.15
* Operating system: Windows 10

### Actual behavior

Height is oversized by exactly 8px consistently (taskbar is set to small icons).

![Alt](https://raw.githubusercontent.com/adi518/electron-frameless-maximize-test/master/issue.jpg)

### How to reproduce

https://github.com/adi518/electron-frameless-maximize-test
atom/browser/native_window_views.cc
if (menu_model == nullptr) {
    
    accelerator_table_.clear();
    GetFocusManager()->UnregisterAccelerators(this);
    
#if defined(USE_X11)
    global_menu_bar_.reset();
#endif
    SetMenuBarVisibility(false);
    menu_bar_.reset();
    return;
  }
  RegisterAccelerators(menu_model);
#if defined(USE_X11)
  if (!global_menu_bar_ && ShouldUseGlobalMenuBar())
    global_menu_bar_.reset(new GlobalMenuBarX11(this));
  
  if (global_menu_bar_ && global_menu_bar_->IsServerStarted()) {
    global_menu_bar_->SetMenu(menu_model);
    return;
  }
#endif
  
  if (!has_frame())