Remove type converters for ui::Event.

ui/events/mojo/mojo_extended_key_event_data.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 UI_EVENTS_MOJO_MOJO_EXTENDED_KEY_EVENT_DATA_H_
-#define UI_EVENTS_MOJO_MOJO_EXTENDED_KEY_EVENT_DATA_H_
-
-#include <stdint.h>
-
-#include "base/macros.h"
-#include "ui/events/event.h"
-#include "ui/events/mojo/mojo_input_events_export.h"
-
-// TODO(beng): should be ui namespace
-namespace mojo {
-
-// A structure to store all mojo specific data on a KeyEvent.
-class MOJO_INPUT_EVENTS_EXPORT MojoExtendedKeyEventData
-    : public ui::ExtendedKeyEventData {
- public:
-  MojoExtendedKeyEventData(int32_t windows_key_code,
-                           uint16_t text,
-                           uint16_t unmodified_text);
-  ~MojoExtendedKeyEventData() override;
-
-  int32_t windows_key_code() const { return windows_key_code_; }
-  uint16_t text() const { return text_; }
-  uint16_t unmodified_text() const { return unmodified_text_; }
-
-  // ui::ExtendedKeyEventData:
-  ui::ExtendedKeyEventData* Clone() const override;
-
- private:
-  const int32_t windows_key_code_;
-  const uint16_t text_;
-  const uint16_t unmodified_text_;
-
-  DISALLOW_COPY_AND_ASSIGN(MojoExtendedKeyEventData);
-};
-
-}  // namespace mojo
-
-#endif  // UI_EVENTS_MOJO_MOJO_EXTENDED_KEY_EVENT_DATA_H_