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

ui/events/input_device.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/events/input_device.h"
-
-#include <string>
-
-namespace ui {
-
-// static
-const unsigned int InputDevice::kInvalidId = 0;
-
-InputDevice::InputDevice()
-    : id(kInvalidId), type(InputDeviceType::INPUT_DEVICE_UNKNOWN) {
-}
-
-InputDevice::InputDevice(unsigned int id,
-                         InputDeviceType type,
-                         const std::string& name)
-    : id(id), type(type), name(name) {
-}
-
-InputDevice::~InputDevice() {
-}
-
-}  // namespace ui