* 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/ui/views/root_view.h
#ifndef ATOM_BROWSER_UI_VIEWS_ROOT_VIEW_H_
#define ATOM_BROWSER_UI_VIEWS_ROOT_VIEW_H_
#include <memory>
#include "atom/browser/ui/accelerator_util.h"
#include "ui/views/view.h"
#include "ui/views/view_tracker.h"
namespace content {
struct NativeWebKeyboardEvent;
}
namespace atom {
class AtomMenuModel;
class MenuBar;
class NativeWindow;
class RootView : public views::View {
 public:
  explicit RootView(NativeWindow* window);
  ~RootView() override;
  void SetMenu(AtomMenuModel* menu_model);
  bool HasMenu() const;
  int GetMenuBarHeight() const;