Remove type converters for ui::Event.

ui/events/mojo/mojo_extended_key_event_data.cc

-// 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.
-
-#include <stdint.h>
-
-#include "ui/events/mojo/mojo_extended_key_event_data.h"
-
-namespace mojo {
-
-MojoExtendedKeyEventData::MojoExtendedKeyEventData(int32_t windows_key_code,
-                                                   uint16_t text,
-                                                   uint16_t unmodified_text)
-    : windows_key_code_(windows_key_code),
-      text_(text),
-      unmodified_text_(unmodified_text) {
-}
-
-MojoExtendedKeyEventData::~MojoExtendedKeyEventData() {}
-
-ui::ExtendedKeyEventData* MojoExtendedKeyEventData::Clone() const {
-  return new MojoExtendedKeyEventData(windows_key_code_,
-                                      text_,
-                                      unmodified_text_);
-}
-
-}  // namespace mojo