Mac: Delete now-dead elastic overscroll code

Source/platform/scroll/ScrollableArea.h

 /*
  * Copyright (C) 2008, 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
@@ skipping 66 matching lines @@
     void notifyScrollPositionChanged(const DoublePoint&);
 
     static bool scrollBehaviorFromString(const String&, ScrollBehavior&);
 
     ScrollResult handleWheelEvent(const PlatformWheelEvent&);
 
     // Functions for controlling if you can scroll past the end of the document.
     bool constrainsScrollingToContentEdge() const { return m_constrainsScrollingToContentEdge; }
     void setConstrainsScrollingToContentEdge(bool constrainsScrollingToContentEdge) { m_constrainsScrollingToContentEdge = constrainsScrollingToContentEdge; }
 
-    void setVerticalScrollElasticity(ScrollElasticity scrollElasticity) { m_verticalScrollElasticity = scrollElasticity; }
-    ScrollElasticity verticalScrollElasticity() const { return static_cast<ScrollElasticity>(m_verticalScrollElasticity); }
-
-    void setHorizontalScrollElasticity(ScrollElasticity scrollElasticity) { m_horizontalScrollElasticity = scrollElasticity; }
-    ScrollElasticity horizontalScrollElasticity() const { return static_cast<ScrollElasticity>(m_horizontalScrollElasticity); }
-
     void setHasViewportConstrainedObjectsForScrollCompensation(bool hasViewportConstrainedObjects) { m_hasViewportConstrainedObjectsForScrollCompensation = hasViewportConstrainedObjects; }
     bool hasViewportConstrainedObjectsForScrollCompensation() const { return m_hasViewportConstrainedObjectsForScrollCompensation; }
 
     bool inLiveResize() const { return m_inLiveResize; }
     void willStartLiveResize();
     void willEndLiveResize();
 
     void contentAreaWillPaint() const;
     void mouseEnteredContentArea() const;
     void mouseExitedContentArea() const;
@@ skipping 89 matching lines @@
     virtual IntPoint lastKnownMousePosition() const { return IntPoint(); }
 
     virtual bool shouldSuspendScrollAnimations() const { return true; }
     virtual void scrollbarStyleChanged() { }
 
     virtual bool scrollbarsCanBeActive() const = 0;
 
     // Returns the bounding box of this scrollable area, in the coordinate system of the enclosing scroll view.
     virtual IntRect scrollableAreaBoundingBox() const = 0;
 
-    virtual bool isRubberBandInProgress() const { return false; }
-    virtual bool rubberBandingOnCompositorThread() const { return false; }
-
     virtual bool scrollAnimatorEnabled() const { return false; }
 
     // NOTE: Only called from Internals for testing.
     void setScrollOffsetFromInternals(const IntPoint&);
 
     IntPoint clampScrollPosition(const IntPoint&) const;
 
     // Let subclasses provide a way of asking for and servicing scroll
     // animations.
     bool scheduleAnimation();
@@ skipping 94 matching lines @@
     struct ScrollableAreaAnimators {
         RefPtr<ScrollAnimator> scrollAnimator;
         OwnPtr<ProgrammaticScrollAnimator> programmaticScrollAnimator;
     };
 
     mutable OwnPtr<ScrollableAreaAnimators> m_animators;
     unsigned m_constrainsScrollingToContentEdge : 1;
 
     unsigned m_inLiveResize : 1;
 
-    unsigned m_verticalScrollElasticity : 2; // ScrollElasticity
-    unsigned m_horizontalScrollElasticity : 2; // ScrollElasticity
-
     unsigned m_scrollbarOverlayStyle : 2; // ScrollbarOverlayStyle
 
     unsigned m_scrollOriginChanged : 1;
 
     unsigned m_hasViewportConstrainedObjectsForScrollCompensation : 1;
 
     // There are 8 possible combinations of writing mode and direction. Scroll origin will be non-zero in the x or y axis
     // if there is any reversed direction or writing-mode. The combinations are:
     // writing-mode / direction     scrollOrigin.x() set    scrollOrigin.y() set
     // horizontal-tb / ltr          NO                      NO
     // horizontal-tb / rtl          YES                     NO
     // horizontal-bt / ltr          NO                      YES
     // horizontal-bt / rtl          YES                     YES
     // vertical-lr / ltr            NO                      NO
     // vertical-lr / rtl            NO                      YES
     // vertical-rl / ltr            YES                     NO
     // vertical-rl / rtl            YES                     YES
     IntPoint m_scrollOrigin;
 };
 
 } // namespace blink
 
 #endif // ScrollableArea_h