Selectively disable rubber banding on mac.

Source/core/page/EventHandler.h

Index: Source/core/page/EventHandler.h
diff --git a/Source/core/page/EventHandler.h b/Source/core/page/EventHandler.h
index 7f025b214ddea81fe6003c45695eab1dd4ee45e5..4be1a801c359d1b2d75e128c8363ab4070e41fab 100644
--- a/Source/core/page/EventHandler.h
+++ b/Source/core/page/EventHandler.h
@@ -139,7 +139,7 @@ public:
 
     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&);
@@ -281,7 +281,7 @@ private:
 
     bool passWidgetMouseDownEventToWidget(const MouseEventWithHitTestResults&);
 
-    bool passWheelEventToWidget(const PlatformWheelEvent&, Widget*);
+    bool passWheelEventToWidget(const PlatformWheelEvent&, Widget*, bool, bool);
 
     void defaultSpaceEventHandler(KeyboardEvent*);
     void defaultBackspaceEventHandler(KeyboardEvent*);