Converts ash to use aura-mus

ash/mus/window_properties.cc

Index: ash/mus/window_properties.cc
diff --git a/ash/mus/window_properties.cc b/ash/mus/window_properties.cc
new file mode 100644
index 0000000000000000000000000000000000000000..c2ba9a8981692f9986fb65923adaf0424d9eaf32
--- /dev/null
+++ b/ash/mus/window_properties.cc
@@ -0,0 +1,17 @@
+// 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 "ash/mus/window_properties.h"
+
+#include "ui/aura/window_property.h"
+
+namespace ash {
+namespace mus {
+
+DEFINE_WINDOW_PROPERTY_KEY(bool, kRenderTitleAreaProperty, false);
+
+DEFINE_WINDOW_PROPERTY_KEY(bool, kWindowIsJanky, false);
+
+}  // namespace mus
+}  // namespace ash