Expose an interface to generate a unique accessibility ID.

third_party/WebKit/public/web/WebAXObject.h

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 75 matching lines @@
     BLINK_EXPORT void reset();
     BLINK_EXPORT void assign(const WebAXObject&);
     BLINK_EXPORT bool equals(const WebAXObject&) const;
 
     bool isNull() const { return m_private.isNull(); }
     // isDetached also checks for null, so it's safe to just call isDetached.
     BLINK_EXPORT bool isDetached() const;
 
     BLINK_EXPORT int axID() const;
 
+    // Get a new AXID that's not used by any accessibility node in this process, for when the
+    // client needs to insert additional nodes into the accessibility tree.
+    BLINK_EXPORT int generateAXID() const;
+
     // Update layout on the underlying tree, and return true if this object is
     // still valid (not detached). Note that calling this method
     // can cause other WebAXObjects to become invalid, too,
     // so always call isDetached if any other WebCore code has run.
     BLINK_EXPORT bool updateLayoutAndCheckValidity();
 
     BLINK_EXPORT unsigned childCount() const;
 
     BLINK_EXPORT WebAXObject childAt(unsigned) const;
     BLINK_EXPORT WebAXObject parentObject() const;
@@ skipping 199 matching lines @@
     operator AXObject*() const;
 #endif
 
 private:
     WebPrivatePtr<AXObject> m_private;
 };
 
 } // namespace blink
 
 #endif