Adds DesktopWindowTreeHostMus

ui/views/widget/desktop_aura/desktop_window_tree_host_chromeos.cc

Index: ui/views/widget/desktop_aura/desktop_window_tree_host_chromeos.cc
diff --git a/ui/views/widget/desktop_aura/desktop_window_tree_host_ozone.cc b/ui/views/widget/desktop_aura/desktop_window_tree_host_chromeos.cc
similarity index 60%
copy from ui/views/widget/desktop_aura/desktop_window_tree_host_ozone.cc
copy to ui/views/widget/desktop_aura/desktop_window_tree_host_chromeos.cc
index e67af41ed0034fc6423b2c2cfd127f7e269f3437..5d3ea30eec814bde68a454a398f52d3ce11b68f7 100644
--- a/ui/views/widget/desktop_aura/desktop_window_tree_host_ozone.cc
+++ b/ui/views/widget/desktop_aura/desktop_window_tree_host_chromeos.cc
@@ -1,21 +1,21 @@
-// Copyright 2013 The Chromium Authors. All rights reserved.
+// 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/aura/window_tree_host.h"
-#include "ui/native_theme/native_theme_aura.h"
-#include "ui/views/widget/desktop_aura/desktop_factory_ozone.h"
 #include "ui/views/widget/desktop_aura/desktop_window_tree_host.h"
 
+#include "ui/native_theme/native_theme_aura.h"
+
 namespace views {
 
+// static
 DesktopWindowTreeHost* DesktopWindowTreeHost::Create(
     internal::NativeWidgetDelegate* native_widget_delegate,
     DesktopNativeWidgetAura* desktop_native_widget_aura) {
-  DesktopFactoryOzone* d_factory = DesktopFactoryOzone::GetInstance();
-
-  return d_factory->CreateWindowTreeHost(native_widget_delegate,
-                                         desktop_native_widget_aura);
+  // DesktopNativeWidgetAura is only used with mus, and MusClient injects the
+  // DesktopWindowTreeHost so that this is never called.
+  NOTREACHED();
+  return nullptr;
 }
 
 // static