Selectively disable rubber banding on mac.

Source/core/page/EventHandler.h

 /*
  * Copyright (C) 2006, 2007, 2009, 2010, 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 121 matching lines @@
 
     // Attempts to scroll the DOM tree. If that fails, scrolls the view.
     // If the view can't be scrolled either, recursively bubble to the parent frame.
     bool bubblingScroll(ScrollDirection, ScrollGranularity, Node* startingNode = 0);
 
     bool handleMouseMoveEvent(const PlatformMouseEvent&);
     void handleMouseLeaveEvent(const PlatformMouseEvent&);
 
     bool handleMousePressEvent(const PlatformMouseEvent&);
     bool handleMouseReleaseEvent(const PlatformMouseEvent&);
-    bool handleWheelEvent(const PlatformWheelEvent&);
+    bool handleWheelEvent(const PlatformWheelEvent&, bool canRubberbandLeft, bool canRubberbandRight);
     void defaultWheelEventHandler(Node*, WheelEvent*);
 
     bool handleGestureEvent(const PlatformGestureEvent&);
     bool handleGestureScrollEnd(const PlatformGestureEvent&);
     bool isScrollbarHandlingGestures() const;
 
     bool bestClickableNodeForTouchPoint(const IntPoint& touchCenter, const IntSize& touchRadius, IntPoint& targetPoint, Node*& targetNode);
     bool bestContextMenuNodeForTouchPoint(const IntPoint& touchCenter, const IntSize& touchRadius, IntPoint& targetPoint, Node*& targetNode);
     bool bestZoomableAreaForTouchPoint(const IntPoint& touchCenter, const IntSize& touchRadius, IntRect& targetArea, Node*& targetNode);
 
@@ skipping 121 matching lines @@
     bool dragHysteresisExceeded(const IntPoint&) const;
 
     bool passMousePressEventToSubframe(MouseEventWithHitTestResults&, LocalFrame* subframe);
     bool passMouseMoveEventToSubframe(MouseEventWithHitTestResults&, LocalFrame* subframe, HitTestResult* hoveredNode = 0);
     bool passMouseReleaseEventToSubframe(MouseEventWithHitTestResults&, LocalFrame* subframe);
 
     bool passMousePressEventToScrollbar(MouseEventWithHitTestResults&, Scrollbar*);
 
     bool passWidgetMouseDownEventToWidget(const MouseEventWithHitTestResults&);
 
-    bool passWheelEventToWidget(const PlatformWheelEvent&, Widget*);
+    bool passWheelEventToWidget(const PlatformWheelEvent&, Widget*, bool, bool);
 
     void defaultSpaceEventHandler(KeyboardEvent*);
     void defaultBackspaceEventHandler(KeyboardEvent*);
     void defaultTabEventHandler(KeyboardEvent*);
     void defaultEscapeEventHandler(KeyboardEvent*);
     void defaultArrowEventHandler(FocusType, KeyboardEvent*);
 
     void updateSelectionForMouseDrag(const HitTestResult&);
 
     void updateLastScrollbarUnderMouse(Scrollbar*, bool);
@@ skipping 99 matching lines @@
     float m_syntheticPageScaleFactor;
 
     Timer<EventHandler> m_activeIntervalTimer;
     double m_lastShowPressTimestamp;
     RefPtr<Element> m_lastDeferredTapElement;
 };
 
 } // namespace WebCore
 
 #endif // EventHandler_h