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

chrome/browser/browser_accessibility_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_WIN_H_
 #define CHROME_BROWSER_BROWSER_ACCESSIBILITY_WIN_H_
 #pragma once
 
 #include <atlbase.h>
 #include <atlcom.h>
@@ skipping 49 matching lines @@
   void AddChild(BrowserAccessibility* child);
 
   // Mark this object as inactive, and remove references to all children.
   // When no other clients hold any references to this object it will be
   // deleted, and in the meantime, calls to any methods will return E_FAIL.
   void InactivateTree();
 
   // Return true if this object is equal to or a descendant of |ancestor|.
   bool IsDescendantOf(BrowserAccessibility* ancestor);
 
+  // Returns the parent of this object, or NULL if it's the BrowserAccessibility
+  // root.
+  BrowserAccessibility* GetParent();
+
   // Return the previous sibling of this object, or NULL if it's the first
   // child of its parent.
   BrowserAccessibility* GetPreviousSibling();
 
   // Return the next sibling of this object, or NULL if it's the last child
   // of its parent.
   BrowserAccessibility* GetNextSibling();
 
+  // Replace a child BrowserAccessibility object. Used when updating the
+  // accessibility tree.
+  void ReplaceChild(
+      const BrowserAccessibility* old_acc, BrowserAccessibility* new_acc);
+
   // Accessors
   LONG child_id() const { return child_id_; }
   int32 renderer_id() const { return renderer_id_; }
+  LONG index_in_parent() const { return index_in_parent_; }
 
   // Add one to the reference count and return the same object. Always
   // use this method when returning a BrowserAccessibility object as
   // an output parameter to a COM interface, never use it otherwise.
   BrowserAccessibility* NewReference();
 
   //
   // IAccessible methods.
   //
 
@@ skipping 300 matching lines @@
   // and it's removed from our accessibility tree, a client may still be
   // holding onto a pointer to this object, so we mark it as inactive
   // so that calls to any of this object's methods immediately return
   // failure.
   bool instance_active_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserAccessibility);
 };
 
 #endif  // CHROME_BROWSER_BROWSER_ACCESSIBILITY_WIN_H_