Remove ui::KeyEvent::platform_keycode_

ui/events/ozone/layout/no/no_keyboard_layout_engine.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/ozone/layout/no/no_keyboard_layout_engine.h"
 
 namespace ui {
 
 bool NoKeyboardLayoutEngine::CanSetCurrentLayout() const {
   return false;
 }
 
 bool NoKeyboardLayoutEngine::SetCurrentLayoutByName(
     const std::string& layout_name) {
   return false;
 }
 
 bool NoKeyboardLayoutEngine::UsesISOLevel5Shift() const {
   return false;
 }
 
 bool NoKeyboardLayoutEngine::UsesAltGr() const {
   return false;
 }
 
 bool NoKeyboardLayoutEngine::Lookup(DomCode dom_code,
                                     int flags,
                                     DomKey* dom_key,
-                                    KeyboardCode* key_code,
-                                    uint32* platform_keycode) const {
+                                    KeyboardCode* key_code) const {
   return false;
 }
 
 }  // namespace ui