Allow the Views Delegate to provide the native widget.

ui/views/views_switches.cc

Index: ui/views/views_switches.cc
===================================================================
--- ui/views/views_switches.cc	(revision 0)
+++ ui/views/views_switches.cc	(revision 0)
@@ -0,0 +1,14 @@
+// Copyright (c) 2012 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/views_switches.h"
+
+namespace views {
+namespace switches {
+
+// Run in desktop mode using the aura framework.
+const char kWinAura[] = "win-aura";
+
+}  // namespace switches
+}  // namespace views