mash: Convert virtual keyboard system tray item to wm common types

ash/shell.h

 // Copyright (c) 2012 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_SHELL_H_
 #define ASH_SHELL_H_
 
 #include <memory>
 #include <utility>
 #include <vector>
@@ skipping 84 matching lines @@
 class WindowTreeHostManager;
 class DisplayErrorObserver;
 class DisplayManager;
 class DragDropController;
 class EventClientImpl;
 class EventRewriterEventFilter;
 class EventTransformationHandler;
 class FirstRunHelper;
 class GPUSupport;
 class HighContrastController;
-class KeyboardUI;
 class KeyboardUMAEventFilter;
 class LastWindowClosedLogoutReminder;
 class LinkHandlerModelFactory;
 class LocaleNotificationController;
 class LockStateController;
 enum class LoginStatus;
 class LogoutConfirmationController;
 class MagnificationController;
 class MaximizeModeController;
 class MaximizeModeWindowManager;
@@ skipping 404 matching lines @@
   ShelfDelegate* GetShelfDelegate();
 
   UserMetricsRecorder* metrics() { return user_metrics_recorder_.get(); }
 
   void SetTouchHudProjectionEnabled(bool enabled);
 
   bool is_touch_hud_projection_enabled() const {
     return is_touch_hud_projection_enabled_;
   }
 
-  KeyboardUI* keyboard_ui() { return keyboard_ui_.get(); }
-
   // TODO(sky): remove this. This was needed by sysui, but as sysui is going
   // away it should no longer be needed.
   bool in_mus() const { return in_mus_; }
 
 #if defined(OS_CHROMEOS)
   // Creates instance of FirstRunHelper. Caller is responsible for deleting
   // returned object.
   ash::FirstRunHelper* CreateFirstRunHelper();
 
   // Toggles cursor compositing on/off. Native cursor is disabled when cursor
@@ skipping 196 matching lines @@
 
   bool is_touch_hud_projection_enabled_;
 
   // Injected content::GPUDataManager support.
   std::unique_ptr<GPUSupport> gpu_support_;
 
   base::SequencedWorkerPool* blocking_pool_;
 
   bool in_mus_ = false;
 
-  std::unique_ptr<KeyboardUI> keyboard_ui_;
-
   DISALLOW_COPY_AND_ASSIGN(Shell);
 };
 
 }  // namespace ash
 
 #endif  // ASH_SHELL_H_