mash: Port KeyboardUIMus to mojo:ash; remove sysui.

ash/sysui/keyboard_ui_mus.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 ASH_SYSUI_KEYBOARD_UI_MUS_H_
-#define ASH_SYSUI_KEYBOARD_UI_MUS_H_
-
-#include <memory>
-
-#include "ash/common/keyboard/keyboard_ui.h"
-#include "base/macros.h"
-#include "mojo/public/cpp/bindings/binding.h"
-#include "ui/keyboard/keyboard.mojom.h"
-
-namespace shell {
-class Connector;
-}
-
-namespace ash {
-
-class KeyboardUIMus : public KeyboardUI,
-                      public keyboard::mojom::KeyboardObserver {
- public:
-  explicit KeyboardUIMus(::shell::Connector* connector);
-  ~KeyboardUIMus() override;
-
-  static std::unique_ptr<KeyboardUI> Create(::shell::Connector* connector);
-
-  // KeyboardUI:
-  void Hide() override;
-  void Show() override;
-  bool IsEnabled() override;
-
-  // keyboard::mojom::KeyboardObserver:
-  void OnKeyboardStateChanged(bool is_enabled,
-                              bool is_visible,
-                              uint64_t display_id,
-                              const gfx::Rect& bounds) override;
-
- private:
-  bool is_enabled_;
-
-  keyboard::mojom::KeyboardPtr keyboard_;
-  mojo::Binding<keyboard::mojom::KeyboardObserver> observer_binding_;
-
-  DISALLOW_COPY_AND_ASSIGN(KeyboardUIMus);
-};
-
-}  // namespace ash
-
-#endif  // ASH_SYSUI_KEYBOARD_UI_MUS_H_