Implemented IAccessible2 reverse relations.

content/browser/accessibility/browser_accessibility_win.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 CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_WIN_H_
 #define CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_WIN_H_
 
 #include <atlbase.h>
 #include <atlcom.h>
 #include <oleacc.h>
@@ skipping 868 matching lines @@
 
   // ID refers to the node ID in the current tree, not the globally unique ID.
   // TODO(nektar): Could we use globally unique IDs everywhere?
   // TODO(nektar): Rename this function to GetFromNodeID.
   BrowserAccessibilityWin* GetFromID(int32_t id) const;
 
   // Returns true if this is a list box option with a parent of type list box,
   // or a menu list option with a parent of type menu list popup.
   bool IsListBoxOptionOrMenuListOption();
 
-  // Given an int list attribute containing the ids of related elements,
-  // add a new IAccessibleRelation for this object with the given type name.
-  void AddRelations(ui::AXIntListAttribute src_attr,
-                    const base::string16& iaccessiblerelation_type);
+  // For adding / removing IA2 relations.
+
+  void AddRelation(const base::string16& relation_type, int target_id);
+  void AddBidirectionalRelations(const base::string16& relation_type,
+                                 const base::string16& reverse_relation_type,
+                                 ui::AXIntListAttribute attribute);
+  // Clears all the forward relations from this object to any other object and
+  // the associated  reverse relations on the other objects, but leaves any
+  // reverse relations on this object alone.
+  void ClearOwnRelations();
+  void RemoveBidirectionalRelationsOfType(
+      const base::string16& relation_type,
+      const base::string16& reverse_relation_type);
+  void RemoveTargetFromRelation(const base::string16& relation_type,
+                                int target_id);
 
   // Updates object attributes of IA2 with html attributes.
   void UpdateRequiredAttributes();
 
   // Fire a Windows-specific accessibility event notification on this node.
   void FireNativeEvent(LONG win_event_type) const;
 
   struct WinAttributes {
     WinAttributes();
     ~WinAttributes();
@@ skipping 54 matching lines @@
 
 CONTENT_EXPORT BrowserAccessibilityWin*
 ToBrowserAccessibilityWin(BrowserAccessibility* obj);
 
 CONTENT_EXPORT const BrowserAccessibilityWin*
 ToBrowserAccessibilityWin(const BrowserAccessibility* obj);
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_WIN_H_