Refactor and move ash independent nested accelerator code to ui/wm/core

ash/accelerators/accelerator_dispatcher.h

-// 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.
-
-#ifndef ASH_ACCELERATORS_ACCELERATOR_DISPATCHER_H_
-#define ASH_ACCELERATORS_ACCELERATOR_DISPATCHER_H_
-
-#include "ash/ash_export.h"
-#include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
-
-namespace base {
-class MessagePumpDispatcher;
-class RunLoop;
-}
-
-namespace ui {
-class KeyEvent;
-}
-
-namespace ash {
-
-// Dispatcher for handling accelerators from menu.
-//
-// Wraps a nested dispatcher to which control is passed if no accelerator key
-// has been pressed. If the nested dispatcher is NULL, then the control is
-// passed back to the default dispatcher.
-// TODO(pkotwicz): Add support for a |nested_dispatcher| which sends
-//  events to a system IME.
-class ASH_EXPORT AcceleratorDispatcher {
- public:
-  virtual ~AcceleratorDispatcher() {}
-
-  static scoped_ptr<AcceleratorDispatcher> Create(
-      base::MessagePumpDispatcher* nested_dispatcher);
-
-  // Creates a base::RunLoop object to run a nested message loop.
-  virtual scoped_ptr<base::RunLoop> CreateRunLoop() = 0;
-
- protected:
-  AcceleratorDispatcher() {}
-
-  // Closes any open menu if the key-event could potentially be a system
-  // accelerator.
-  // Returns whether a menu was closed.
-  bool MenuClosedForPossibleAccelerator(const ui::KeyEvent& key_event);
-
-  // Attempts to trigger an accelerator for the key-event.
-  // Returns whether an accelerator was triggered.
-  bool AcceleratorProcessedForKeyEvent(const ui::KeyEvent& key_event);
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(AcceleratorDispatcher);
-};
-
-}  // namespace ash
-
-#endif  // ASH_ACCELERATORS_ACCELERATOR_DISPATCHER_H_