Changes views_aura_mus_unittests to create DesktopNativeWidgetAura

ui/views/widget/native_widget_aura_interactive_uitest.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/widget/native_widget_aura.h"
 
 #include "ui/aura/window.h"
 #include "ui/views/controls/textfield/textfield.h"
 #include "ui/views/test/native_widget_factory.h"
 #include "ui/views/test/views_interactive_ui_test_base.h"
@@ skipping 31 matching lines @@
 }  // namespace
 
 using NativeWidgetAuraTest = ViewsInteractiveUITestBase;
 
 // When requesting view focus from a non-active top level widget, focus is not
 // instantly given. Instead, the view is firstly stored and then it is attempted
 // to activate the widget. If widget is currently not activatable, focus should
 // not be grabbed. And focus will be given/restored the next time the widget is
 // made active. (crbug.com/621791)
 TEST_F(NativeWidgetAuraTest, NonActiveWindowRequestImeFocus) {
+  // TODO: test uses GetContext(), which is not applicable to aura-mus.
+  // http://crbug.com/663809.
+  if (IsAuraMusClient())
+    return;
+
   TestFocusRules* test_focus_rules = new TestFocusRules;
   std::unique_ptr<wm::FocusController> focus_controller =
       base::MakeUnique<wm::FocusController>(test_focus_rules);
   aura::client::SetActivationClient(GetContext(), focus_controller.get());
 
   Widget* widget1 = new Widget;
   Widget::InitParams params1(Widget::InitParams::TYPE_WINDOW_FRAMELESS);
   params1.context = GetContext();
   params1.native_widget =
       CreatePlatformNativeWidgetImpl(params1, widget1, kDefault, nullptr);
@@ skipping 38 matching lines @@
   EXPECT_TRUE(textfield2a->HasFocus());
   EXPECT_FALSE(textfield2b->HasFocus());
   EXPECT_FALSE(textfield1->HasFocus());
 
   widget1->CloseNow();
   widget2->CloseNow();
 }
 
 }  // namespace test
 }  // namespace views