Fixes issue with accelerators when a menu is open

ash/accelerators/nested_dispatcher_controller.h

+// Copyright (c) 2012 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.
+
+#ifndef ASH_ACCELERATORS_NESTED_DISPATCHER_CONTROLLER_H_
+#define ASH_ACCELERATORS_NESTED_DISPATCHER_CONTROLLER_H_
+#pragma once
+
+#include "ash/ash_export.h"
+#include "base/message_loop.h"
+#include "ui/aura/client/dispatcher_client.h"
+
+namespace ash {
+
+// Creates a dispatcher which wraps another dispatcher.
+// The outer dispatcher runs first and performs ash specific handling.
+// If it does not consume the event it forwards the event to the nested
+// dispatcher.
+class ASH_EXPORT NestedDispatcherController
+    : public aura::client::DispatcherClient {
+
+ public:
+  NestedDispatcherController();
+
+  void RunWithDispatcher(MessageLoop::Dispatcher* dispatcher,
+                         bool nestable_tasks_allowed);
+
+  DISALLOW_COPY_AND_ASSIGN(NestedDispatcherController);
+};
+
+}  // namespace ash
+
+#endif  // ASH_ACCELERATORS_NESTED_DISPATCHER_CONTROLLER_H_