Remove InputMethodEventHandler.

ash/ime/input_method_event_handler.h

-// Copyright 2015 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 ASH_IME_INPUT_METHOD_EVENT_HANDLER_H_
-#define ASH_IME_INPUT_METHOD_EVENT_HANDLER_H_
-
-#include "ash/ash_export.h"
-#include "base/macros.h"
-#include "ui/events/event_handler.h"
-
-namespace ui {
-class InputMethod;
-class KeyEvent;
-}
-
-namespace ash {
-
-// An EventHandler
-class ASH_EXPORT InputMethodEventHandler : public ui::EventHandler {
- public:
-  explicit InputMethodEventHandler(ui::InputMethod* input_method);
-  ~InputMethodEventHandler() override;
-
-  // True to skip sending event to the InputMethod. This is used
-  // to process event passed from |DispatchKeyEventPostIME|.
-  void SetPostIME(bool post_ime);
-
- private:
-  // Overridden from ui::EventHandler:
-  void OnKeyEvent(ui::KeyEvent* event) override;
-
-  ui::InputMethod* input_method_;
-
-  bool post_ime_;
-
-  DISALLOW_COPY_AND_ASSIGN(InputMethodEventHandler);
-};
-
-}  // namespace ash
-
-#endif  // ASH_INPUT_METHOD_EVENT_HANDLER_H_