Remove Nested Message Loop from MenuController

ui/views/controls/menu/menu_message_loop_mac.cc

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "ui/views/controls/menu/menu_message_loop_mac.h"
-
-#include "base/auto_reset.h"
-#include "base/logging.h"
-#include "base/message_loop/message_loop.h"
-#include "base/run_loop.h"
-#include "ui/gfx/geometry/point.h"
-
-namespace views {
-
-// static
-MenuMessageLoop* MenuMessageLoop::Create() {
-  return new MenuMessageLoopMac;
-}
-
-// static
-void MenuMessageLoop::RepostEventToWindow(const ui::LocatedEvent* event,
-                                          gfx::NativeWindow window,
-                                          const gfx::Point& screen_loc) {
-  NOTIMPLEMENTED();
-}
-
-MenuMessageLoopMac::MenuMessageLoopMac() {}
-
-MenuMessageLoopMac::~MenuMessageLoopMac() {}
-
-void MenuMessageLoopMac::Run() {
-  base::MessageLoopForUI* loop = base::MessageLoopForUI::current();
-  base::MessageLoop::ScopedNestableTaskAllower allow(loop);
-  base::RunLoop run_loop;
-  base::AutoReset<base::RunLoop*> reset_run_loop(&run_loop_, &run_loop);
-  run_loop.Run();
-}
-
-void MenuMessageLoopMac::QuitNow() {
-  DCHECK(run_loop_);
-  run_loop_->Quit();
-}
-
-}  // namespace views