Enables passing initial properties to top level window creation

ui/views/test/native_widget_factory_aura_mus.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/test/native_widget_factory.h"
 
 #include "base/memory/ptr_util.h"
 #include "ui/views/mus/desktop_window_tree_host_mus.h"
 #include "ui/views/mus/mus_client.h"
 #include "ui/views/test/test_platform_native_widget.h"
@@ skipping 11 matching lines @@
     int32_t type,
     bool* destroyed) {
   if (!create_desktop_native_widget_aura) {
     return new TestPlatformNativeWidget<NativeWidgetAura>(
         widget, type == kStubCapture, destroyed);
   }
   DesktopNativeWidgetAura* desktop_native_widget_aura =
       new TestPlatformNativeWidget<DesktopNativeWidgetAura>(
           widget, type == kStubCapture, destroyed);
   desktop_native_widget_aura->SetDesktopWindowTreeHost(
-      base::MakeUnique<DesktopWindowTreeHostMus>(widget,
-                                                 desktop_native_widget_aura));
+      base::MakeUnique<DesktopWindowTreeHostMus>(
+          widget, desktop_native_widget_aura, init_params));
   return desktop_native_widget_aura;
 }
 
 }  // namespace
 
 NativeWidget* CreatePlatformNativeWidgetImpl(
     const Widget::InitParams& init_params,
     Widget* widget,
     uint32_t type,
     bool* destroyed) {
   // Only create a NativeWidgetAura if necessary, otherwise use
   // DesktopNativeWidgetAura.
   return CreatePlatformNativeWidgetImplAuraMus(
       MusClient::ShouldCreateDesktopNativeWidgetAura(init_params), init_params,
       widget, type, destroyed);
 }
 
 NativeWidget* CreatePlatformDesktopNativeWidgetImpl(
     const Widget::InitParams& init_params,
     Widget* widget,
     bool* destroyed) {
   return CreatePlatformNativeWidgetImplAuraMus(true, init_params, widget,
                                                kDefault, destroyed);
 }
 
 }  // namespace test
 }  // namespace views