Move shell service to toplevel shell namespace

mash/wm/root_window_controller.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 "mash/wm/root_window_controller.h"
 
 #include <stdint.h>
 
 #include "base/bind.h"
 #include "components/mus/common/util.h"
@@ skipping 45 matching lines @@
 void RootWindowController::Destroy() {
   // See class description for details on lifetime.
   if (root_) {
     delete root_->connection();
   } else {
     // This case only happens if we're destroyed before OnEmbed().
     delete this;
   }
 }
 
-mojo::Connector* RootWindowController::GetConnector() {
+shell::Connector* RootWindowController::GetConnector() {
   return app_->connector();
 }
 
 mus::Window* RootWindowController::GetWindowForContainer(
     mojom::Container container) {
   return root_->GetChildByLocalId(ContainerToLocalId(container));
 }
 
 bool RootWindowController::WindowIsContainer(const mus::Window* window) const {
   return window && window->parent() == root_;
@@ skipping 118 matching lines @@
   CreateContainer(mojom::Container::BUBBLES, mojom::Container::ROOT);
   CreateContainer(mojom::Container::SYSTEM_MODAL_WINDOWS,
                   mojom::Container::ROOT);
   CreateContainer(mojom::Container::KEYBOARD, mojom::Container::ROOT);
   CreateContainer(mojom::Container::MENUS, mojom::Container::ROOT);
   CreateContainer(mojom::Container::TOOLTIPS, mojom::Container::ROOT);
 }
 
 }  // namespace wm
 }  // namespace mash