Mus Demo: Demonstrate external window mode

services/ui/demo/mus_demo.cc

 // 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.
 
 #include "services/ui/demo/mus_demo.h"
 
 #include "base/memory/ptr_util.h"
 #include "base/time/time.h"
 #include "services/service_manager/public/cpp/connector.h"
 #include "services/ui/public/cpp/gpu/gpu.h"
@@ skipping 54 matching lines @@
 
 }  // namespace
 
 MusDemo::WindowTreeData::WindowTreeData(
     std::unique_ptr<aura::WindowTreeHostMus> window_tree_host,
     int square_size)
     : square_size_(square_size) {
   Init(std::move(window_tree_host));
 }
 
+MusDemo::WindowTreeData::WindowTreeData(mojom::WindowTreeHostFactory* factory,
+                                        mojom::WindowTreeClientPtr tree_client,
+                                        int square_size)
+    : square_size_(square_size) {
+  factory->CreateWindowTreeHost(MakeRequest(&host_), std::move(tree_client));
+}
+
 MusDemo::WindowTreeData::~WindowTreeData() {}
 
 aura::Window* MusDemo::WindowTreeData::bitmap_window() {
   DCHECK(!window_tree_host_->window()->children().empty());
   return window_tree_host_->window()->children()[0];
 }
 
 void MusDemo::WindowTreeData::Init(
     std::unique_ptr<aura::WindowTreeHostMus> window_tree_host) {
   window_tree_host->InitHost();
@@ skipping 90 matching lines @@
 
 void MusDemo::OnPointerEventObserved(const PointerEvent& event,
                                      aura::Window* target) {}
 
 aura::PropertyConverter* MusDemo::GetPropertyConverter() {
   return property_converter_.get();
 }
 
 }  // namespace demo
 }  // namespace aura