Eliminate OnConnect usage

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 51 matching lines @@
     return window_tree_client_.get();
   }
 
  private:
   virtual void OnStartImpl() = 0;
   virtual std::unique_ptr<aura::WindowTreeClient> CreateWindowTreeClient() = 0;
   bool HasPendingWindowTreeData() const;
 
   // 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;
   void OnEmbedRootDestroyed(aura::WindowTreeHostMus* window_tree_host) override;
   void OnLostConnection(aura::WindowTreeClient* client) override;
   void OnPointerEventObserved(const ui::PointerEvent& event,
                               aura::Window* target) override;
   aura::PropertyConverter* GetPropertyConverter() override;
@@ skipping 11 matching lines @@
   // next call to InitWindowTreeData.
   std::vector<std::unique_ptr<WindowTreeData>> window_tree_data_list_;
 
   DISALLOW_COPY_AND_ASSIGN(MusDemo);
 };
 
 }  // namespace demo
 }  // namespace ui
 
 #endif  // SERVICES_UI_DEMO_MUS_DEMO_H_