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

ash/common/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/keyboard/keyboard_ui.h"
 
 #include "ash/common/accessibility_delegate.h"
+#include "ash/common/keyboard/keyboard_ui_observer.h"
 #include "ash/common/system/accessibility_observer.h"
 #include "ash/common/system/tray/wm_system_tray_notifier.h"
+#include "ash/common/system/tray_accessibility.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);
   }
@@ skipping 39 matching lines @@
   observers_.AddObserver(observer);
 }
 
 void KeyboardUI::RemoveObserver(KeyboardUIObserver* observer) {
   observers_.RemoveObserver(observer);
 }
 
 KeyboardUI::KeyboardUI() {}
 
 }  // namespace ash