Add kAccessibilityFocusFallsbackToWidget property

ui/aura/client/aura_constants.h

 // 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.
 
 #ifndef UI_AURA_CLIENT_AURA_CONSTANTS_H_
 #define UI_AURA_CLIENT_AURA_CONSTANTS_H_
 
 #include <string>
 
 #include "base/strings/string16.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/aura/aura_export.h"
 #include "ui/aura/window.h"
 #include "ui/base/ui_base_types.h"
 
 namespace ui {
 class InputMethod;
 namespace mojom {
 enum class WindowType;
 }
 }
 
 namespace aura {
 namespace client {
 
 // Alphabetical sort.
 
+// A property key to store whether accessibility focus falls back to widget or
+// not.
+AURA_EXPORT extern const WindowProperty<bool>* const
+    kAccessibilityFocusFallsbackToWidgetKey;
+
 // A property key to store always-on-top flag.
 AURA_EXPORT extern const WindowProperty<bool>* const kAlwaysOnTopKey;
 
 // A property key to store whether animations are disabled for the window. Type
 // of value is an int.
 AURA_EXPORT extern const WindowProperty<bool>* const kAnimationsDisabledKey;
 
 // A property key to store the app icon, typically larger for shelf icons, etc.
 AURA_EXPORT extern const WindowProperty<gfx::ImageSkia*>* const kAppIconKey;
 
@@ skipping 68 matching lines @@
 
 AURA_EXPORT extern const aura::WindowProperty<ui::mojom::WindowType>* const
     kWindowTypeKey;
 
 // Alphabetical sort.
 
 }  // namespace client
 }  // namespace aura
 
 #endif  // UI_AURA_CLIENT_AURA_CONSTANTS_H_