Update browser accessibility tree on a renderer accessibility object state ch...

chrome/browser/browser_accessibility_manager_win.h

 // Copyright (c) 2010 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_BROWSER_ACCESSIBILITY_MANAGER_WIN_H_
 #define CHROME_BROWSER_BROWSER_ACCESSIBILITY_MANAGER_WIN_H_
 #pragma once
 
 #include <atlbase.h>
 #include <atlcom.h>
@@ skipping 61 matching lines @@
 
   // Tell the renderer to set focus to this node.
   void SetFocus(const BrowserAccessibility& node);
 
   // Tell the renderer to do the default action for this node.
   void DoDefaultAction(const BrowserAccessibility& node);
 
   // Called when the renderer process has notified us of a focus, state,
   // or children change. Send a notification to MSAA clients of the change.
   void OnAccessibilityFocusChange(int acc_obj_id);
-  void OnAccessibilityObjectStateChange(int acc_obj_id);
+  void OnAccessibilityObjectStateChange(
+      const webkit_glue::WebAccessibility& acc_obj);
   void OnAccessibilityObjectChildrenChange(
       const std::vector<webkit_glue::WebAccessibility>& acc_changes);
 
  private:
+  // Update the accessibility tree with an updated WebAccessibility tree or
+  // subtree received from the renderer process. Returns the updated node or
+  // NULL if no node was updated.
+  BrowserAccessibility* UpdateTree(
+      const webkit_glue::WebAccessibility& acc_obj);
+
   // Returns the next MSAA child id.
   static LONG GetNextChildID();
 
   // Recursively build a tree of BrowserAccessibility objects from
   // the WebAccessibility tree received from the renderer process.
   BrowserAccessibility* CreateAccessibilityTree(
       BrowserAccessibility* parent,
       int child_id,
       const webkit_glue::WebAccessibility& src,
       int index_in_parent);
@@ skipping 24 matching lines @@
 
   // The next child ID to use; static so that they're global to the process.
   // Screen readers cache these IDs to see if they've seen the same object
   // before so we should avoid reusing them within the same project.
   static LONG next_child_id_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserAccessibilityManager);
 };
 
 #endif  // CHROME_BROWSER_BROWSER_ACCESSIBILITY_MANAGER_WIN_H_