Makes it possible for clients to directly create WindowTreeHostMus

ui/views/mus/mus_client.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 "ui/views/mus/mus_client.h"
 
 #include "base/bind.h"
 #include "base/memory/ptr_util.h"
 #include "services/service_manager/public/cpp/connection.h"
 #include "services/service_manager/public/cpp/connector.h"
 #include "services/ui/public/cpp/gpu_service.h"
 #include "services/ui/public/interfaces/event_matcher.mojom.h"
 #include "ui/aura/env.h"
 #include "ui/aura/mus/os_exchange_data_provider_mus.h"
 #include "ui/aura/mus/property_converter.h"
 #include "ui/aura/mus/window_port_mus.h"
 #include "ui/aura/mus/window_tree_client.h"
+#include "ui/aura/mus/window_tree_host_mus.h"
 #include "ui/aura/window.h"
 #include "ui/aura/window_tree_host.h"
 #include "ui/views/mus/aura_init.h"
 #include "ui/views/mus/clipboard_mus.h"
 #include "ui/views/mus/screen_mus.h"
 #include "ui/views/mus/surface_context_factory.h"
 #include "ui/views/views_delegate.h"
 #include "ui/wm/core/base_focus_rules.h"
 #include "ui/wm/core/capture_controller.h"
 #include "ui/wm/core/focus_controller.h"
@@ skipping 105 matching lines @@
   // TYPE_CONTROL widgets require a NativeWidgetAura. So we let this fall
   // through, so that the default NativeWidgetPrivate::CreateNativeWidget() is
   // used instead.
   if (init_params.type == Widget::InitParams::TYPE_CONTROL)
     return nullptr;
   return nullptr;
 }
 
 std::unique_ptr<aura::WindowPort> MusClient::CreateWindowPort(
     aura::Window* window) {
-  return base::MakeUnique<aura::WindowPortMus>(window_tree_client_.get());
+  return base::MakeUnique<aura::WindowPortMus>(window_tree_client_.get(),
+                                               aura::WindowMusType::LOCAL);
 }
 
-void MusClient::OnEmbed(aura::Window* root) {}
+void MusClient::OnEmbed(
+    std::unique_ptr<aura::WindowTreeHostMus> window_tree_host) {}
 
 void MusClient::OnLostConnection(aura::WindowTreeClient* client) {}
 
 void MusClient::OnEmbedRootDestroyed(aura::Window* root) {
   // Not called for MusClient as WindowTreeClient isn't created by
   // way of an Embed().
   NOTREACHED();
 }
 
 void MusClient::OnPointerEventObserved(const ui::PointerEvent& event,
@@ skipping 35 matching lines @@
       return root->GetTopWindowContainingPoint(relative_point);
   }
   return nullptr;
 }
 
 std::unique_ptr<OSExchangeData::Provider> MusClient::BuildProvider() {
   return base::MakeUnique<aura::OSExchangeDataProviderMus>();
 }
 
 }  // namespace views