Changes views_aura_mus_unittests to create DesktopNativeWidgetAura

ui/views/view_unittest_aura.cc

Index: ui/views/view_unittest_aura.cc
diff --git a/ui/views/view_unittest_aura.cc b/ui/views/view_unittest_aura.cc
index 531302ae75b9e2792239206f7a84b27acade1196..4e2660481ecf99bab975f3c028f36aea314fa037 100644
--- a/ui/views/view_unittest_aura.cc
+++ b/ui/views/view_unittest_aura.cc
@@ -61,6 +61,11 @@ typedef ViewsTestBase ViewAuraTest;
 //     +-- v8
 //     +-- v9
 TEST_F(ViewAuraTest, RecreateLayersWithWindows) {
+  // TODO: test uses GetContext(), which is not applicable to aura-mus.
+  // http://crbug.com/663809.
+  if (IsAuraMusClient())
+    return;
+
   Widget* w1 = CreateControlWidget(GetContext(), gfx::Rect(0, 0, 100, 100));
   w1->GetNativeView()->layer()->set_name("w1");