Changes views_aura_mus_unittests to create DesktopNativeWidgetAura

ui/views/mus/views_mus_test_suite.cc

Index: ui/views/mus/views_mus_test_suite.cc
diff --git a/ui/views/mus/views_mus_test_suite.cc b/ui/views/mus/views_mus_test_suite.cc
index 1ace18322f109cd7eb43446e35a4b997ad40e43a..892c096e6798d6d3eba4dcd7b45e218a16b1af01 100644
--- a/ui/views/mus/views_mus_test_suite.cc
+++ b/ui/views/mus/views_mus_test_suite.cc
@@ -19,6 +19,7 @@
 #include "services/service_manager/public/cpp/service_context.h"
 #include "services/ui/common/switches.h"
 #include "testing/gtest/include/gtest/gtest.h"
+#include "ui/aura/window.h"
 #include "ui/views/mus/window_manager_connection.h"
 #include "ui/views/test/platform_test_helper.h"
 #include "ui/views/views_delegate.h"
@@ -57,6 +58,11 @@ class PlatformTestHelperMus : public PlatformTestHelper {
   }
   ~PlatformTestHelperMus() override {}
 
+  // PlatformTestHelper:
+  void SimulateNativeDestroy(Widget* widget) override {
+    delete widget->GetNativeView();
+  }
+
  private:
   std::unique_ptr<WindowManagerConnection> connection_;