Allow objects without scrollbars to be scrollable

Source/core/rendering/RenderListBox.h

 /*
  * This file is part of the select element renderer in WebCore.
  *
  * Copyright (C) 2006, 2007, 2009 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
@@ skipping 86 matching lines @@
     virtual int scrollWidth() const;
     virtual int scrollHeight() const;
     virtual void setScrollLeft(int);
     virtual void setScrollTop(int);
 
     virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction) OVERRIDE;
 
     // ScrollableArea interface.
     virtual int scrollSize(ScrollbarOrientation) const OVERRIDE;
     virtual int scrollPosition(Scrollbar*) const OVERRIDE;
+    virtual IntPoint scrollPosition() const OVERRIDE;
     virtual void setScrollOffset(const IntPoint&) OVERRIDE;
     virtual void invalidateScrollbarRect(Scrollbar*, const IntRect&) OVERRIDE;
     virtual bool isActive() const OVERRIDE;
     virtual bool isScrollCornerVisible() const OVERRIDE { return false; } // We don't support resize on list boxes yet. If we did these would have to change.
     virtual IntRect scrollCornerRect() const OVERRIDE { return IntRect(); }
     virtual void invalidateScrollCornerRect(const IntRect&) OVERRIDE { }
     virtual IntRect convertFromScrollbarToContainingView(const Scrollbar*, const IntRect&) const OVERRIDE;
     virtual IntRect convertFromContainingViewToScrollbar(const Scrollbar*, const IntRect&) const OVERRIDE;
     virtual IntPoint convertFromScrollbarToContainingView(const Scrollbar*, const IntPoint&) const OVERRIDE;
     virtual IntPoint convertFromContainingViewToScrollbar(const Scrollbar*, const IntPoint&) const OVERRIDE;
     virtual Scrollbar* verticalScrollbar() const OVERRIDE { return m_vBar.get(); }
     virtual IntSize contentsSize() const OVERRIDE;
     virtual int visibleHeight() const OVERRIDE;
     virtual int visibleWidth() const OVERRIDE;
     virtual IntPoint lastKnownMousePosition() const OVERRIDE;
     virtual bool shouldSuspendScrollAnimations() const OVERRIDE;
     virtual bool scrollbarsCanBeActive() const OVERRIDE;
     virtual IntPoint maximumScrollPosition() const OVERRIDE;
+    virtual bool isHorizontallyScrollable() const OVERRIDE { return false; }
+    virtual bool isVerticallyScrollable() const OVERRIDE { return true; }
 
     virtual ScrollableArea* enclosingScrollableArea() const OVERRIDE;
     virtual IntRect scrollableAreaBoundingBox() const OVERRIDE;
 
     // NOTE: This should only be called by the overriden setScrollOffset from ScrollableArea.
     void scrollTo(int newOffset);
 
     void setHasVerticalScrollbar(bool hasScrollbar);
     PassRefPtr<Scrollbar> createScrollbar();
     void destroyScrollbar();
@@ skipping 22 matching lines @@
     ASSERT_WITH_SECURITY_IMPLICATION(!object || object->isListBox());
     return static_cast<RenderListBox*>(object);
 }
 
 // This will catch anyone doing an unnecessary cast.
 void toRenderListBox(const RenderListBox*);
 
 } // namepace WebCore
 
 #endif // RenderListBox_h