Fix Chrome OS virtual keyboard accessibility

ui/views/accessibility/ax_window_obj_wrapper.h

 // Copyright 2014 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_VIEWS_ACCESSIBILITY_AX_WINDOW_OBJ_WRAPPER_H_
 #define UI_VIEWS_ACCESSIBILITY_AX_WINDOW_OBJ_WRAPPER_H_
 
 #include <stdint.h>
 
 #include "base/macros.h"
@@ skipping 25 matching lines @@
   void Serialize(ui::AXNodeData* out_node_data) override;
   int32_t GetID() override;
 
   // WindowObserver overrides.
   void OnWindowDestroyed(aura::Window* window) override;
   void OnWindowDestroying(aura::Window* window) override;
   void OnWindowHierarchyChanged(const HierarchyChangeParams& params) override;
   void OnWindowBoundsChanged(aura::Window* window,
                              const gfx::Rect& old_bounds,
                              const gfx::Rect& new_bounds) override;
+  void OnWindowPropertyChanged(aura::Window* window,
+                               const void* key,
+                               intptr_t old) override;
 
  private:
   aura::Window* window_;
 
   bool is_alert_;
 
   DISALLOW_COPY_AND_ASSIGN(AXWindowObjWrapper);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_ACCESSIBILITY_AX_WINDOW_OBJ_WRAPPER_H_