Changes views_aura_mus_unittests to create DesktopNativeWidgetAura

ui/views/test/platform_test_helper.cc

Index: ui/views/test/platform_test_helper.cc
diff --git a/ui/views/test/platform_test_helper.cc b/ui/views/test/platform_test_helper.cc
index b6626189fa390b2141ef70e1ff3704344714770f..64ff7ffa11017fa40ef9aae903cf24591fe15cb9 100644
--- a/ui/views/test/platform_test_helper.cc
+++ b/ui/views/test/platform_test_helper.cc
@@ -7,6 +7,18 @@
 #include "base/callback.h"
 #include "base/logging.h"
 #include "base/memory/ptr_util.h"
+#include "ui/views/widget/widget.h"
+
+#if defined(USE_AURA)
+#include "ui/aura/window.h"
+#endif
+
+#if defined(OS_MACOSX)
+#include <Cocoa/Cocoa.h>
+
+#import "base/mac/scoped_nsobject.h"
+#include "ui/views/widget/native_widget_mac.h"
+#endif
 
 namespace views {
 namespace {
@@ -17,6 +29,20 @@ class DefaultPlatformTestHelper : public PlatformTestHelper {
 
   ~DefaultPlatformTestHelper() override {}
 
+  // PlatformTestHelper:
+  void SimulateNativeDestroy(Widget* widget) override {
+#if defined(USE_AURA)
+    delete widget->GetNativeView();
+#elif defined(OS_MACOSX)
+    // Retain the window while closing it, otherwise the window may lose its
+    // last
+    // owner before -[NSWindow close] completes (this offends AppKit). Usually
+    // this reference will exist on an event delivered to the runloop.
+    base::scoped_nsobject<NSWindow> window([widget->GetNativeWindow() retain]);
+    [window close];
+#endif
+  }
+
  private:
   DISALLOW_COPY_AND_ASSIGN(DefaultPlatformTestHelper);
 };