One AXObjectCache per frame

Source/modules/accessibility/AXScrollView.h

Index: Source/modules/accessibility/AXScrollView.h
diff --git a/Source/modules/accessibility/AXScrollView.h b/Source/modules/accessibility/AXScrollView.h
deleted file mode 100644
index 18b0320caaf3628825304d6bc8cad63b2a332a74..0000000000000000000000000000000000000000
--- a/Source/modules/accessibility/AXScrollView.h
+++ /dev/null
@@ -1,89 +0,0 @@
-/*
- * Copyright (C) 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
- *     notice, this list of conditions and the following disclaimer in the
- *     documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
- * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#ifndef AXScrollView_h
-#define AXScrollView_h
-
-#include "modules/accessibility/AXObject.h"
-
-namespace blink {
-
-class AXObjectCacheImpl;
-class AXScrollbar;
-class Scrollbar;
-class FrameView;
-
-class AXScrollView final : public AXObject {
-public:
-    static AXScrollView* create(FrameView*, AXObjectCacheImpl&);
-    AccessibilityRole roleValue() const override { return ScrollAreaRole; }
-    FrameView* scrollView() const { return m_scrollView; }
-
-    ~AXScrollView() override;
-    DECLARE_VIRTUAL_TRACE();
-    void detach() override;
-
-protected:
-    ScrollableArea* getScrollableAreaIfScrollable() const override;
-
-private:
-    AXScrollView(FrameView*, AXObjectCacheImpl&);
-
-    bool computeAccessibilityIsIgnored(IgnoredReasons* = nullptr) const override;
-    bool isAXScrollView() const override { return true; }
-    bool isEnabled() const override { return true; }
-
-    bool isAttachment() const override;
-    Widget* widgetForAttachmentView() const override;
-
-    AXObject* scrollBar(AccessibilityOrientation) override;
-    void addChildren() override;
-    void clearChildren() override;
-    AXObject* accessibilityHitTest(const IntPoint&) const override;
-    void updateChildrenIfNecessary() override;
-    void setNeedsToUpdateChildren() override { m_childrenDirty = true; }
-    void updateScrollbars();
-
-    FrameView* documentFrameView() const override;
-    LayoutRect elementRect() const override;
-    AXObject* computeParent() const override;
-    AXObject* computeParentIfExists() const override;
-
-    AXObject* webAreaObject() const;
-    AXObject* firstChild() const override { return webAreaObject(); }
-    AXScrollbar* addChildScrollbar(Scrollbar*);
-    void removeChildScrollbar(AXObject*);
-
-    RawPtrWillBeMember<FrameView> m_scrollView;
-    Member<AXObject> m_horizontalScrollbar;
-    Member<AXObject> m_verticalScrollbar;
-    bool m_childrenDirty;
-};
-
-DEFINE_AX_OBJECT_TYPE_CASTS(AXScrollView, isAXScrollView());
-
-} // namespace blink
-
-#endif // AXScrollView_h