Keep track of accessibility focus across windows.

third_party/WebKit/Source/web/WebDocument.cpp

 /*
  * 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 248 matching lines @@
     return cache ? WebAXObject(cache->getOrCreate(document->layoutView())) : WebAXObject();
 }
 
 WebAXObject WebDocument::accessibilityObjectFromID(int axID) const
 {
     const Document* document = constUnwrap<Document>();
     AXObjectCacheImpl* cache = toAXObjectCacheImpl(document->axObjectCache());
     return cache ? WebAXObject(cache->objectFromAXID(axID)) : WebAXObject();
 }
 
+WebAXObject WebDocument::focusedAccessibilityObject() const
+{
+    const Document* document = constUnwrap<Document>();
+    AXObjectCacheImpl* cache = toAXObjectCacheImpl(document->axObjectCache());
+    return cache ? WebAXObject(cache->focusedObject()) : WebAXObject();
+}
+
 WebVector<WebDraggableRegion> WebDocument::draggableRegions() const
 {
     WebVector<WebDraggableRegion> draggableRegions;
     const Document* document = constUnwrap<Document>();
     if (document->hasAnnotatedRegions()) {
         const Vector<AnnotatedRegionValue>& regions = document->annotatedRegions();
         draggableRegions = WebVector<WebDraggableRegion>(regions.size());
         for (size_t i = 0; i < regions.size(); i++) {
             const AnnotatedRegionValue& value = regions[i];
             draggableRegions[i].draggable = value.draggable;
@@ skipping 54 matching lines @@
     m_private = elem;
     return *this;
 }
 
 WebDocument::operator PassRefPtrWillBeRawPtr<Document>() const
 {
     return toDocument(m_private.get());
 }
 
 } // namespace blink