One AXObjectCache per frame

Source/modules/accessibility/AXObjectCacheImpl.h

 /*
  * Copyright (C) 2014, 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:
  *
  * 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 @@
 #include "platform/Timer.h"
 #include "wtf/Forward.h"
 #include "wtf/HashMap.h"
 #include "wtf/HashSet.h"
 
 namespace blink {
 
 class AbstractInlineTextBox;
 class HTMLAreaElement;
 class FrameView;
-class Widget;
 
 // This class should only be used from inside the accessibility directory.
 class MODULES_EXPORT AXObjectCacheImpl : public AXObjectCache {
     WTF_MAKE_NONCOPYABLE(AXObjectCacheImpl);
 public:
     static AXObjectCache* create(Document&);
 
     explicit AXObjectCacheImpl(Document&);
     ~AXObjectCacheImpl();
     DECLARE_VIRTUAL_TRACE();
 
-    AXObject* focusedUIElementForPage(const Page*);
-
     void dispose() override;
 
     void selectionChanged(Node*) override;
     void childrenChanged(Node*) override;
     void childrenChanged(LayoutObject*) override;
     void checkedStateChanged(Node*) override;
     virtual void listboxOptionStateChanged(HTMLOptionElement*);
     virtual void listboxSelectedChildrenChanged(HTMLSelectElement*);
     virtual void listboxActiveIndexChanged(HTMLSelectElement*);
 
     void remove(LayoutObject*) override;
     void remove(Node*) override;
-    void remove(Widget*) override;
     void remove(AbstractInlineTextBox*) override;
 
     const Element* rootAXEditableElement(const Node*) override;
 
     // Called by a node when text or a text equivalent (e.g. alt) attribute is changed.
     void textChanged(LayoutObject*) override;
     // Called when a node has just been attached, so we can make sure we have the right subclass of AXObject.
     void updateCacheAfterNodeIsAttached(Node*) override;
 
     void handleAttributeChanged(const QualifiedName& attrName, Element*) override;
     void handleFocusedUIElementChanged(Node* oldFocusedNode, Node* newFocusedNode) override;
     void handleInitialFocus() override;
     void handleTextFormControlChanged(Node*) override;
     void handleEditableTextContentChanged(Node*) override;
     void handleValueChanged(Node*) override;
     void handleUpdateActiveMenuOption(LayoutMenuList*, int optionIndex) override;
     void didShowMenuListPopup(LayoutMenuList*) override;
     void didHideMenuListPopup(LayoutMenuList*) override;
     void handleLoadComplete(Document*) override;
     void handleLayoutComplete(Document*) override;
 
     void setCanvasObjectBounds(Element*, const LayoutRect&) override;
 
     void inlineTextBoxesUpdated(LayoutObject*) override;
 
     // Called when the scroll offset changes.
     void handleScrollPositionChanged(FrameView*) override;
     void handleScrollPositionChanged(LayoutObject*) override;
 
-    // Called when scroll bars are added / removed (as the view resizes).
-    void handleScrollbarUpdate(FrameView*) override;
     void handleLayoutComplete(LayoutObject*) override;
     void handleScrolledToAnchor(const Node* anchorNode) override;
 
     const AtomicString& computedRoleForNode(Node*) override;
     String computedNameForNode(Node*) override;
 
     // Returns the root object for the entire document.
     AXObject* rootObject();
 
     AXObject* objectFromAXID(AXID id) const { return m_objects.get(id); }
     AXObject* root();
 
     // used for objects without backing elements
     AXObject* getOrCreate(AccessibilityRole);
     AXObject* getOrCreate(LayoutObject*);
-    AXObject* getOrCreate(Widget*);
     AXObject* getOrCreate(Node*);
     AXObject* getOrCreate(AbstractInlineTextBox*);
 
     // will only return the AXObject if it already exists
     AXObject* get(Node*);
     AXObject* get(LayoutObject*);
-    AXObject* get(Widget*);
     AXObject* get(AbstractInlineTextBox*);
 
     AXObject* firstAccessibleObjectFromNode(const Node*);
 
     void remove(AXID);
 
     void childrenChanged(AXObject*);
 
     void handleActiveDescendantChanged(Node*);
     void handleAriaRoleChanged(Node*);
@@ skipping 52 matching lines @@
     AXObject* createFromNode(Node*);
     AXObject* createFromInlineTextBox(AbstractInlineTextBox*);
 
 private:
 
     RawPtrWillBeMember<Document> m_document;
     HeapHashMap<AXID, Member<AXObject>> m_objects;
     // LayoutObject and AbstractInlineTextBox are not on the Oilpan heap so we
     // do not use HeapHashMap for those mappings.
     HashMap<LayoutObject*, AXID> m_layoutObjectMapping;
-    WillBeHeapHashMap<RawPtrWillBeMember<Widget>, AXID> m_widgetObjectMapping;
     WillBeHeapHashMap<RawPtrWillBeMember<Node>, AXID> m_nodeObjectMapping;
     HashMap<AbstractInlineTextBox*, AXID> m_inlineTextBoxObjectMapping;
     int m_modificationCount;
 
     HashSet<AXID> m_idsInUse;
 
 #if ENABLE(ASSERT)
     // Verified when finalizing.
     bool m_hasBeenDisposed;
 #endif
@@ skipping 42 matching lines @@
 // This is the only subclass of AXObjectCache.
 DEFINE_TYPE_CASTS(AXObjectCacheImpl, AXObjectCache, cache, true, true);
 
 bool nodeHasRole(Node*, const String& role);
 // This will let you know if aria-hidden was explicitly set to false.
 bool isNodeAriaVisible(Node*);
 
 }
 
 #endif