Changes views_aura_mus_unittests to create DesktopNativeWidgetAura

ui/views/mus/mus_client.h

Index: ui/views/mus/mus_client.h
diff --git a/ui/views/mus/mus_client.h b/ui/views/mus/mus_client.h
index b0664a6614149af1e9bd1c27d5891da6896cc9e3..11f33839de0be0db170acbc38f35ee4f5c00e54e 100644
--- a/ui/views/mus/mus_client.h
+++ b/ui/views/mus/mus_client.h
@@ -62,6 +62,12 @@ class VIEWS_MUS_EXPORT MusClient
 
   static MusClient* Get() { return instance_; }
 
+  // Returns true if a DesktopNativeWidgetAura should be created given the
+  // specified params. If this returns false a NativeWidgetAura should be
+  // created.
+  static bool ShouldCreateDesktopNativeWidgetAura(
+      const Widget::InitParams& init_params);
+
   service_manager::Connector* connector() { return connector_; }
 
   aura::WindowTreeClient* window_tree_client() {