One AXObjectCache per frame

Source/modules/accessibility/AXObject.cpp

 /*
  * Copyright (C) 2008, 2009, 2011 Apple 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 893 matching lines @@
             if (obj->style()->hasAppearance())
                 LayoutTheme::theme().addVisualOverflow(*obj, r);
             result.unite(r);
         }
     }
     return result;
 }
 
 AXObject* AXObject::elementAccessibilityHitTest(const IntPoint& point) const
 {
-    // Send the hit test back into the sub-frame if necessary.
-    if (isAttachment()) {
-        Widget* widget = widgetForAttachmentView();
-        // Normalize the point for the widget's bounds.
-        if (widget && widget->isFrameView())
-            return axObjectCache().getOrCreate(widget)->accessibilityHitTest(IntPoint(point - widget->frameRect().location()));
-    }
-
     // Check if there are any mock elements that need to be handled.
     for (const auto& child : m_children) {
         if (child->isMockObject() && child->elementRect().contains(point))
             return child->elementAccessibilityHitTest(point);
     }
 
     return const_cast<AXObject*>(this);
 }
 
 const AXObject::AccessibilityChildrenVector& AXObject::children()
@@ skipping 46 matching lines @@
 void AXObject::clearChildren()
 {
     // Detach all weak pointers from objects to their parents.
     for (const auto& child : m_children)
         child->detachFromParent();
 
     m_children.clear();
     m_haveChildren = false;
 }
 
-AXObject* AXObject::focusedUIElement() const
-{
-    Document* doc = document();
-    if (!doc)
-        return 0;
-
-    Page* page = doc->page();
-    if (!page)
-        return 0;
-
-    return axObjectCache().focusedUIElementForPage(page);
-}
-
 Document* AXObject::document() const
 {
     FrameView* frameView = documentFrameView();
     if (!frameView)
         return 0;
 
     return frameView->frame().document();
 }
 
 FrameView* AXObject::documentFrameView() const
@@ skipping 490 matching lines @@
 
 DEFINE_TRACE(AXObject)
 {
     visitor->trace(m_children);
     visitor->trace(m_parent);
     visitor->trace(m_cachedLiveRegionRoot);
     visitor->trace(m_axObjectCache);
 }
 
 } // namespace blink