mash: Move tray accessibility and keyboard to //ash/common

ash/keyboard/keyboard_ui.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 "ash/keyboard/keyboard_ui.h"
-
-#include "ash/common/accessibility_delegate.h"
-#include "ash/common/system/accessibility_observer.h"
-#include "ash/common/system/tray/wm_system_tray_notifier.h"
-#include "ash/common/wm_shell.h"
-#include "ash/keyboard/keyboard_ui_observer.h"
-#include "ash/system/tray_accessibility.h"
-#include "base/memory/ptr_util.h"
-#include "ui/keyboard/keyboard_controller.h"
-
-namespace ash {
-
-class KeyboardUIImpl : public KeyboardUI, public AccessibilityObserver {
- public:
-  KeyboardUIImpl() {
-    WmShell::Get()->system_tray_notifier()->AddAccessibilityObserver(this);
-  }
-
-  ~KeyboardUIImpl() override {
-    if (WmShell::HasInstance() && WmShell::Get()->system_tray_notifier())
-      WmShell::Get()->system_tray_notifier()->RemoveAccessibilityObserver(this);
-  }
-
-  // KeyboardUI:
-  void Show() override {
-    keyboard::KeyboardController::GetInstance()->ShowKeyboard(true);
-  }
-  void Hide() override {
-    // Do nothing as this is called from ash::Shell, which also calls through
-    // to the appropriate keyboard functions.
-  }
-  bool IsEnabled() override {
-    return WmShell::Get()
-        ->GetAccessibilityDelegate()
-        ->IsVirtualKeyboardEnabled();
-  }
-
-  // AccessibilityObserver:
-  void OnAccessibilityModeChanged(
-      AccessibilityNotificationVisibility notify) override {
-    FOR_EACH_OBSERVER(KeyboardUIObserver, *observers(),
-                      OnKeyboardEnabledStateChanged(IsEnabled()));
-  }
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(KeyboardUIImpl);
-};
-
-KeyboardUI::~KeyboardUI() {}
-
-// static
-std::unique_ptr<KeyboardUI> KeyboardUI::Create() {
-  return base::WrapUnique(new KeyboardUIImpl);
-}
-
-void KeyboardUI::AddObserver(KeyboardUIObserver* observer) {
-  observers_.AddObserver(observer);
-}
-
-void KeyboardUI::RemoveObserver(KeyboardUIObserver* observer) {
-  observers_.RemoveObserver(observer);
-}
-
-KeyboardUI::KeyboardUI() {}
-
-}  // namespace ash