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

ash/sysui/keyboard_ui_mus.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/sysui/keyboard_ui_mus.h"
 
-#include "ash/keyboard/keyboard_ui_observer.h"
+#include "ash/common/keyboard/keyboard_ui_observer.h"
 #include "ash/shell.h"
 #include "ash/shell_delegate.h"
 #include "base/memory/ptr_util.h"
 #include "services/shell/public/cpp/connector.h"
 
 namespace ash {
 
 KeyboardUIMus::KeyboardUIMus(::shell::Connector* connector)
     : is_enabled_(false), observer_binding_(this) {
   // TODO(sky): should be something like mojo:keyboard, but need mapping.
@@ skipping 27 matching lines @@
                                            const gfx::Rect& bounds) {
   if (is_enabled_ == is_enabled)
     return;
 
   is_enabled_ = is_enabled;
   FOR_EACH_OBSERVER(KeyboardUIObserver, *observers(),
                     OnKeyboardEnabledStateChanged(is_enabled));
 }
 
 }  // namespace ash