Adds DesktopWindowTreeHostMus

mash/catalog_viewer/catalog_viewer.cc

Index: mash/catalog_viewer/catalog_viewer.cc
diff --git a/mash/catalog_viewer/catalog_viewer.cc b/mash/catalog_viewer/catalog_viewer.cc
index 59efddf6976222203965f04a56cc2a7eefeab76d..61854de3a102c9ec8cf7794edffc04d5ca0dc286 100644
--- a/mash/catalog_viewer/catalog_viewer.cc
+++ b/mash/catalog_viewer/catalog_viewer.cc
@@ -168,8 +168,8 @@ void CatalogViewer::RemoveWindow(views::Widget* window) {
 void CatalogViewer::OnStart(const service_manager::ServiceInfo& info) {
   tracing_.Initialize(connector(), info.identity.name());
 
-  aura_init_.reset(
-      new views::AuraInit(connector(), "views_mus_resources.pak"));
+  aura_init_ = base::MakeUnique<views::AuraInit>(connector(), info.identity,
+                                                 "views_mus_resources.pak");
   window_manager_connection_ =
       views::WindowManagerConnection::Create(connector(), info.identity);
 }