Mus Demo: Demonstrate external window mode

services/ui/demo/mus_demo.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 SERVICES_UI_DEMO_MUS_DEMO_H_
 #define SERVICES_UI_DEMO_MUS_DEMO_H_
 
 #include <memory>
 
 #include "base/callback.h"
@@ skipping 32 matching lines @@
   ~MusDemo() override;
 
  protected:
   void AddPrimaryDisplay(const display::Display& display);
   void InitWindowTreeData(
       std::unique_ptr<aura::WindowTreeHostMus> window_tree_host);
   void CleanupWindowTreeData();
 
  private:
   virtual void OnStartImpl(
-      std::unique_ptr<aura::WindowTreeClient>& window_tree_client,
-      std::unique_ptr<WindowTreeData>& window_tree_data) = 0;
+      std::unique_ptr<aura::WindowTreeClient>* window_tree_client,
+      std::unique_ptr<WindowTreeData>* window_tree_data) = 0;
 
   // service_manager::Service:
   void OnStart() override;
   bool OnConnect(const service_manager::ServiceInfo& remote_info,
                  service_manager::InterfaceRegistry* registry) override;
 
   // aura::WindowTreeClientDelegate:
   void OnEmbed(
       std::unique_ptr<aura::WindowTreeHostMus> window_tree_host) override;
   void OnUnembed(aura::Window* root) override;
@@ skipping 13 matching lines @@
 
   std::unique_ptr<WindowTreeData> window_tree_data_;
 
   DISALLOW_COPY_AND_ASSIGN(MusDemo);
 };
 
 }  // namespace demo
 }  // namespace ui
 
 #endif  // SERVICES_UI_DEMO_MUS_DEMO_H_