Move shell service to toplevel shell namespace

ash/mus/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/mus/keyboard_ui_mus.h"
 
 #include "ash/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(mojo::Connector* connector)
+KeyboardUIMus::KeyboardUIMus(::shell::Connector* connector)
     : is_enabled_(false), observer_binding_(this) {
   // TODO(sky): should be something like mojo:keyboard, but need mapping.
   connector->ConnectToInterface("exe:chrome", &keyboard_);
   keyboard_->AddObserver(observer_binding_.CreateInterfacePtrAndBind());
 }
 
 KeyboardUIMus::~KeyboardUIMus() {}
 
 // static
-std::unique_ptr<KeyboardUI> KeyboardUIMus::Create(mojo::Connector* connector) {
+std::unique_ptr<KeyboardUI> KeyboardUIMus::Create(
+    ::shell::Connector* connector) {
   return base::WrapUnique(new KeyboardUIMus(connector));
 }
 
 void KeyboardUIMus::Hide() {
   keyboard_->Hide();
 }
 
 void KeyboardUIMus::Show() {
   keyboard_->Show();
 }
 
 bool KeyboardUIMus::IsEnabled() {
   return is_enabled_;
 }
 
 void KeyboardUIMus::OnKeyboardStateChanged(bool is_enabled,
                                            bool is_visible,
                                            uint64_t display_id,
                                            mojo::RectPtr bounds) {
   if (is_enabled_ == is_enabled)
     return;
 
   is_enabled_ = is_enabled;
   FOR_EACH_OBSERVER(KeyboardUIObserver, *observers(),
                     OnKeyboardEnabledStateChanged(is_enabled));
 }
 
 }  // namespace ash