Index: ui/accessibility/platform/aura_window_properties.cc |
diff --git a/ui/accessibility/platform/aura_window_properties.cc b/ui/accessibility/platform/aura_window_properties.cc |
new file mode 100644 |
index 0000000000000000000000000000000000000000..146ad75b77e8ec6738db2abb1631ebac956776d0 |
--- /dev/null |
+++ b/ui/accessibility/platform/aura_window_properties.cc |
@@ -0,0 +1,15 @@ |
+// Copyright 2017 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/accessibility/platform/aura_window_properties.h" |
+ |
+#include "ui/base/class_property.h" |
+ |
+namespace ui { |
+ |
+DEFINE_UI_CLASS_PROPERTY_KEY(AXTreeIDRegistry::AXTreeID, |
+ kChildAXTreeID, |
+ AXTreeIDRegistry::kNoAXTreeID); |
+ |
+} // namespace ui |