Changes views_aura_mus_unittests to create DesktopNativeWidgetAura

ui/views/mus/mus_client.h

 // 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.
 
 #ifndef UI_VIEWS_MUS_MUS_CLIENT_INIT_H_
 #define UI_VIEWS_MUS_MUS_CLIENT_INIT_H_
 
 #include <string>
 
 #include "base/macros.h"
@@ skipping 44 matching lines @@
 // AuraInit::Mode::AURA to AuraInit and MusClient will be created for us.
 class VIEWS_MUS_EXPORT MusClient
     : public aura::WindowTreeClientDelegate,
       public ScreenMusDelegate,
       public ui::OSExchangeDataProviderFactory::Factory {
  public:
   ~MusClient() override;
 
   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() {
     return window_tree_client_.get();
   }
 
   // Creates DesktopNativeWidgetAura with DesktopWindowTreeHostMus. This is
   // set as the factory function used for creating NativeWidgets when a
   //  NativeWidget has not been explicitly set.
   NativeWidget* CreateNativeWidget(const Widget::InitParams& init_params,
@@ skipping 42 matching lines @@
   std::unique_ptr<aura::GpuService> gpu_service_;
 
   std::unique_ptr<aura::MusContextFactory> compositor_context_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(MusClient);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_MUS_MUS_CLIENT_INIT_H_