Move all event related devices from ui/events/ to ui/events/devices/

ui/events/touchscreen_device.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 UI_EVENTS_TOUCHSCREEN_DEVICE_H_
-#define UI_EVENTS_TOUCHSCREEN_DEVICE_H_
-
-#include <string>
-
-#include "ui/events/events_base_export.h"
-#include "ui/events/input_device.h"
-#include "ui/gfx/geometry/size.h"
-
-namespace ui {
-
-// Represents a Touchscreen device state.
-struct EVENTS_BASE_EXPORT TouchscreenDevice : public InputDevice {
-  // Creates an invalid touchscreen device.
-  TouchscreenDevice();
-
-  TouchscreenDevice(unsigned int id,
-                    InputDeviceType type,
-                    const std::string& name,
-                    const gfx::Size& size);
-
-  // Size of the touch screen area.
-  gfx::Size size;
-};
-
-}  // namespace ui
-
-#endif  // UI_EVENTS_TOUCHSCREEN_DEVICE_H_