chromeos: Move files in //ash/common to //ash, part 2

ash/common/wm/window_cycle_event_filter.h

-// Copyright 2016 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_COMMON_WM_WINDOW_CYCLE_EVENT_FILTER_H_
-#define ASH_COMMON_WM_WINDOW_CYCLE_EVENT_FILTER_H_
-
-#include "ash/ash_export.h"
-
-namespace ash {
-
-// Created by WindowCycleController when cycling through windows. Eats all key
-// events and stops cycling when the necessary key sequence is encountered.
-class ASH_EXPORT WindowCycleEventFilter {
- public:
-  virtual ~WindowCycleEventFilter() {}
-};
-
-}  // namepsace ash
-
-#endif  // ASH_COMMON_WM_WINDOW_CYCLE_EVENT_FILTER_H_