Move shell service to toplevel shell namespace

mash/wm/root_window_controller.h

 // 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.
 
 #ifndef MASH_WM_ROOT_WINDOW_CONTROLLER_H_
 #define MASH_WM_ROOT_WINDOW_CONTROLLER_H_
 
 #include <memory>
 
 #include "components/mus/public/cpp/window_observer.h"
 #include "components/mus/public/cpp/window_tree_delegate.h"
 #include "components/mus/public/interfaces/window_manager_constants.mojom.h"
 #include "components/mus/public/interfaces/window_tree_host.mojom.h"
 #include "mash/wm/public/interfaces/container.mojom.h"
 #include "mojo/public/cpp/bindings/binding.h"
 
-namespace mojo {
-class Connector;
-}
-
 namespace mus {
 class WindowManagerClient;
 }
 
+namespace shell {
+class Connector;
+}
+
 namespace ui {
 class Event;
 }
 
 namespace mash {
 namespace wm {
 
 class LayoutManager;
 class ShadowController;
 class WindowManager;
 class WindowManagerApplication;
 
 // RootWindowController manages the windows and state for a single display.
 //
 // RootWindowController deletes itself when the root mus::Window is destroyed.
 // You can trigger deletion explicitly by way of Destroy().
 class RootWindowController : public mus::WindowObserver,
                              public mus::WindowTreeDelegate {
  public:
   static RootWindowController* CreateFromDisplay(
       WindowManagerApplication* app,
       mus::mojom::DisplayPtr display,
       mojo::InterfaceRequest<mus::mojom::WindowTreeClient> client_request);
 
   // Deletes this.
   void Destroy();
 
-  mojo::Connector* GetConnector();
+  shell::Connector* GetConnector();
 
   mus::Window* root() { return root_; }
 
   int window_count() { return window_count_; }
   void IncrementWindowCount() { ++window_count_; }
 
   mus::Window* GetWindowForContainer(mojom::Container container);
   bool WindowIsContainer(const mus::Window* window) const;
 
   WindowManager* window_manager() { return window_manager_.get(); }
@@ skipping 32 matching lines @@
 
   mus::mojom::DisplayPtr display_;
 
   DISALLOW_COPY_AND_ASSIGN(RootWindowController);
 };
 
 }  // namespace wm
 }  // namespace mash
 
 #endif  // MASH_WM_ROOT_WINDOW_CONTROLLER_H_