Move shell service to toplevel shell namespace

mash/example/common/mus_views_init.h

 // Copyright 2015 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_EXAMPLE_COMMON_MUS_VIEWS_INIT_H_
 #define MASH_EXAMPLE_COMMON_MUS_VIEWS_INIT_H_
 
 #include <memory>
 
 #include "base/macros.h"
 #include "components/mus/public/cpp/window_tree_delegate.h"
 #include "components/mus/public/interfaces/window_manager.mojom.h"
 #include "ui/views/mus/aura_init.h"
 #include "ui/views/views_delegate.h"
 
 namespace mojo {
 class ShellConnection;
 }
 
 namespace views {
 class AuraInit;
 }
 
 // Does the necessary setup to use mus, views and the example wm.
 class MUSViewsInit : public views::ViewsDelegate,
                      public mus::WindowTreeDelegate {
  public:
-  explicit MUSViewsInit(mojo::ShellConnection* app);
+  explicit MUSViewsInit(shell::ShellConnection* app);
   ~MUSViewsInit() override;
 
  private:
   mus::Window* NewWindow();
 
   // views::ViewsDelegate:
   views::NativeWidget* CreateNativeWidget(
       views::internal::NativeWidgetDelegate* delegate) override;
   void OnBeforeWidgetInit(
       views::Widget::InitParams* params,
       views::internal::NativeWidgetDelegate* delegate) override;
 
   // mus::WindowTreeDelegate:
   void OnEmbed(mus::Window* root) override;
   void OnConnectionLost(mus::WindowTreeConnection* connection) override;
 #if defined(OS_WIN)
   HICON GetSmallWindowIcon() const override;
 #endif
 
-  mojo::ShellConnection* app_;
+  shell::ShellConnection* app_;
   std::unique_ptr<views::AuraInit> aura_init_;
   mus::mojom::WindowManagerPtr window_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(MUSViewsInit);
 };
 
 #endif  // MASH_EXAMPLE_COMMON_MUS_VIEWS_INIT_H_