Create Source/modules/accessibility/ and move most of core/accessibility/* into it

Source/core/accessibility/AXScrollView.h

Index: Source/core/accessibility/AXScrollView.h
diff --git a/Source/core/accessibility/AXScrollView.h b/Source/core/accessibility/AXScrollView.h
deleted file mode 100644
index 14c87268508fb89f67650880c375058aa1b90872..0000000000000000000000000000000000000000
--- a/Source/core/accessibility/AXScrollView.h
+++ /dev/null
@@ -1,98 +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 "core/accessibility/AXObject.h"
-
-namespace blink {
-
-class AXScrollbar;
-class Scrollbar;
-class FrameView;
-
-class AXScrollView final : public AXObject {
-public:
-    static PassRefPtr<AXScrollView> create(FrameView*);
-    virtual AccessibilityRole roleValue() const override { return ScrollAreaRole; }
-    FrameView* scrollView() const { return m_scrollView; }
-
-    virtual ~AXScrollView();
-    virtual void detach() override;
-
-protected:
-    virtual ScrollableArea* getScrollableAreaIfScrollable() const override;
-    virtual void scrollTo(const IntPoint&) const override;
-
-private:
-    explicit AXScrollView(FrameView*);
-
-    virtual bool computeAccessibilityIsIgnored() const override;
-    virtual bool isAXScrollView() const override { return true; }
-    virtual bool isEnabled() const override { return true; }
-
-    virtual bool isAttachment() const override;
-    virtual Widget* widgetForAttachmentView() const override;
-
-    virtual AXObject* scrollBar(AccessibilityOrientation) override;
-    virtual void addChildren() override;
-    virtual void clearChildren() override;
-    virtual AXObject* accessibilityHitTest(const IntPoint&) const override;
-    virtual void updateChildrenIfNecessary() override;
-    virtual void setNeedsToUpdateChildren() override { m_childrenDirty = true; }
-    void updateScrollbars();
-
-    virtual FrameView* documentFrameView() const override;
-    virtual LayoutRect elementRect() const override;
-    virtual AXObject* computeParent() const override;
-    virtual AXObject* computeParentIfExists() const override;
-
-    AXObject* webAreaObject() const;
-    virtual AXObject* firstChild() const override { return webAreaObject(); }
-    AXScrollbar* addChildScrollbar(Scrollbar*);
-    void removeChildScrollbar(AXObject*);
-
-    // FIXME: Oilpan: Frame/ScrollView is on the heap and its
-    // AXScrollView is detached&removed from the AX cache when the
-    // FrameView is disposed. Which clears m_scrollView, hence this
-    // bare pointer will not be stale, so the bare pointer use is safe
-    // & acceptable.
-    //
-    // However, it would be preferable to have it be normally traced
-    // as part of moving the AX objects to the heap. Temporarily using
-    // a Persistent risks creating a FrameView leak, and brings no
-    // real benefits overall.
-    FrameView* m_scrollView;
-    RefPtr<AXObject> m_horizontalScrollbar;
-    RefPtr<AXObject> m_verticalScrollbar;
-    bool m_childrenDirty;
-};
-
-DEFINE_AX_OBJECT_TYPE_CASTS(AXScrollView, isAXScrollView());
-
-} // namespace blink
-
-#endif // AXScrollView_h