Revert: Remove WindowTreeClientDelegate::GetCaptureClient() and WindowTreeClient::GetCaptureClient()

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 <map>
 #include <memory>
 #include <set>
@@ skipping 46 matching lines @@
                  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::client::CaptureClient* GetCaptureClient() override;
   aura::PropertyConverter* GetPropertyConverter() override;
 
   // aura::WindowManagerDelegate:
   void SetWindowManagerClient(aura::WindowManagerClient* client) override;
   bool OnWmSetBounds(aura::Window* window, gfx::Rect* bounds) override;
   bool OnWmSetProperty(
       aura::Window* window,
       const std::string& name,
       std::unique_ptr<std::vector<uint8_t>>* new_data) override;
   void OnWmSetCanFocus(aura::Window* window, bool can_focus) override;
@@ skipping 49 matching lines @@
   // Last time a frame was drawn.
   base::TimeTicks last_draw_frame_time_;
 
   DISALLOW_COPY_AND_ASSIGN(MusDemo);
 };
 
 }  // namespace demo
 }  // namespace aura
 
 #endif  // SERVICES_UI_DEMO_MUS_DEMO_H_