One AXObjectCache per frame

Source/modules/accessibility/AXLayoutObject.h

 /*
  * Copyright (C) 2008 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 25 matching lines @@
 
 namespace blink {
 
 class AXObjectCacheImpl;
 class AXSVGRoot;
 class Element;
 class FrameView;
 class HTMLAreaElement;
 class IntPoint;
 class Node;
-class Widget;
 
 class MODULES_EXPORT AXLayoutObject : public AXNodeObject {
 protected:
     AXLayoutObject(LayoutObject*, AXObjectCacheImpl&);
 
 public:
     static AXLayoutObject* create(LayoutObject*, AXObjectCacheImpl&);
     ~AXLayoutObject() override;
 
     // Public, overridden from AXObject.
@@ skipping 122 matching lines @@
     void clearChildren() override;
 
     // Properties of the object's owning document or page.
     double estimatedLoadingProgress() const override;
 
     // DOM and layout tree access.
     Node* node() const override;
     Document* document() const override;
     FrameView* documentFrameView() const override;
     Element* anchorElement() const override;
-    Widget* widgetForAttachmentView() const override;
 
     void setValue(const String&) override;
 
     // Notifications that this object may have changed.
     void handleActiveDescendantChanged() override;
     void handleAriaExpandedChanged() override;
     void textChanged() override;
 
     // Text metrics. Most of these should be deprecated, needs major cleanup.
     int index(const VisiblePosition&) const override;
@@ skipping 10 matching lines @@
     LayoutObject* layoutParentObject() const;
     bool isSVGImage() const;
     void detachRemoteSVGRoot();
     AXSVGRoot* remoteSVGRootElement() const;
     AXObject* remoteSVGElementHitTest(const IntPoint&) const;
     void offsetBoundingBoxForRemoteSVGElement(LayoutRect&) const;
     void addHiddenChildren();
     void addTextFieldChildren();
     void addImageMapChildren();
     void addCanvasChildren();
-    void addAttachmentChildren();
     void addPopupChildren();
     void addRemoteSVGChildren();
     void addInlineTextBoxChildren(bool force);
 
     void ariaSelectedRows(AccessibilityChildrenVector&);
     bool elementAttributeValue(const QualifiedName&) const;
     LayoutRect computeElementRect() const;
     AXRange textControlSelection() const;
     int indexForVisiblePosition(const VisiblePosition&) const;
     AXLayoutObject* getUnignoredObjectFromNode(Node&) const;
 };
 
 DEFINE_AX_OBJECT_TYPE_CASTS(AXLayoutObject, isAXLayoutObject());
 
 } // namespace blink
 
 #endif // AXLayoutObject_h