* Electron Version: 3.0.0-beta.1 ~ 3.0.0-beta.6
* Operating System (Platform and Version): Ubuntu 16.04.2 LTS
* Last known working Electron version: versions before 3.0.0-beta.1

**Expected Behavior**
Console prints out `time to print stuff` when `Ctrl+P` is pressed.
```
const {Menu, MenuItem} = require('electron')
const menu = new Menu()
  
app.on('ready', () => {
  createWindow()
  menu.append(new MenuItem({
    label: 'Print',
    accelerator: 'CmdOrCtrl+P',
    click: () => { console.log('time to print stuff') }
  }))
  Menu.setApplicationMenu(menu)
})
```
https://github.com/hackjutsu/electron-quick-start/commit/6ceb5d7dcd2d946c071b43a3fdd1b0434ddebff5
**Actual behavior**
No output. The accelerator event is not triggered.

**To Reproduce**
```sh
git clone https://github.com/hackjutsu/electron-quick-start
cd electron-quick-start
npm install
npm run start
```
Try pressing `Ctrl+P`, and observe the output. (nothing happen...)
Change the electron version back to 2.0.0 in `pakcage.json`
```sh
npm install
npm run start
```
Try pressing `Ctrl+P`, and observe the output. (the log `time to print stuff` will show up in console)

atom/browser/native_window_views.cc
options.Get(options::kHeight, &height);
  gfx::Rect bounds(0, 0, width, height);
  widget_size_ = bounds.size();
  widget()->AddObserver(this);
  views::Widget::InitParams params;
  params.ownership = views::Widget::InitParams::WIDGET_OWNS_NATIVE_WIDGET;
  params.bounds = bounds;
  params.delegate = this;
  params.type = views::Widget::InitParams::TYPE_WINDOW;
  params.remove_standard_frame = !has_frame();
  if (transparent())
    params.opacity = views::Widget::InitParams::TRANSLUCENT_WINDOW;
  
  
  if (transparent() && !has_frame())
    params.shadow_type = views::Widget::InitParams::SHADOW_TYPE_NONE;
  bool focusable;
  if (options.Get(options::kFocusable, &focusable) && !focusable)
    params.activatable = views::Widget::InitParams::ACTIVATABLE_NO;
#if defined(OS_WIN)
  if (parent)
    params.parent = parent->GetNativeWindow();
  params.native_widget = new AtomDesktopNativeWidgetAura(widget());
  atom_desktop_window_tree_host_win_ = new AtomDesktopWindowTreeHostWin(
      this, widget(),
      static_cast<views::DesktopNativeWidgetAura*>(params.native_widget));
  params.desktop_window_tree_host = atom_desktop_window_tree_host_win_;
#elif defined(USE_X11)
  std::string name = Browser::Get()->GetName();