Changes views_aura_mus_unittests to create DesktopNativeWidgetAura

ui/views/test/native_widget_factory_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 "ui/views/mus/window_manager_connection.h"
+#include "ui/views/test/test_platform_native_widget.h"
+#include "ui/views/widget/native_widget_aura.h"
 
 namespace views {
 namespace test {
 
+NativeWidget* CreatePlatformNativeWidgetImpl(
+    const Widget::InitParams& init_params,
+    Widget* widget,
+    uint32_t type,
+    bool* destroyed) {
+  return new TestPlatformNativeWidget<NativeWidgetAura>(
+      widget, type == kStubCapture, destroyed);
+}
+
 NativeWidget* CreatePlatformDesktopNativeWidgetImpl(
     const Widget::InitParams& init_params,
     Widget* widget,
     bool* destroyed) {
   return WindowManagerConnection::Get()->CreateNativeWidgetMus(
       std::map<std::string, std::vector<uint8_t>>(), init_params, widget);
 }
 
 }  // namespace test
 }  // namespace views