Update browser cache of accessibility tree on renderer sub-tree changes....

chrome/browser/renderer_host/render_widget_host.h

 // Copyright (c) 2009 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 CHROME_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_H_
 #define CHROME_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_H_
 #pragma once
 
 #include <deque>
 #include <string>
@@ skipping 367 matching lines @@
   void EnableRendererAccessibility();
 
   // Relays a request from assistive technology to set focus to the
   // node with this accessibility object id.
   void SetAccessibilityFocus(int acc_obj_id);
 
   // Relays a request from assistive technology to perform the default action
   // on a node with this accessibility object id.
   void AccessibilityDoDefaultAction(int acc_obj_id);
 
+  // Acknowledges a ViewHostMsg_AccessibilityObjectChildrenChange message.
+  void AccessibilityObjectChildrenChangeAck();
+
   // Sets the active state (i.e., control tints).
   virtual void SetActive(bool active);
 
   void set_ignore_input_events(bool ignore_input_events) {
     ignore_input_events_ = ignore_input_events;
   }
   bool ignore_input_events() const {
     return ignore_input_events_;
   }
 
@@ skipping 295 matching lines @@
   // we don't do it more than once.
   bool requested_accessibility_tree_;
 
   // Optional video YUV layer for used for out-of-process compositing.
   scoped_ptr<VideoLayer> video_layer_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHost);
 };
 
 #endif  // CHROME_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_H_