Expose scroll customization for touch to JS (behind REF).

Source/core/dom/Element.h

Index: Source/core/dom/Element.h
diff --git a/Source/core/dom/Element.h b/Source/core/dom/Element.h
index 6cca778a4b41dded08715ca5236b39891bb9f40f..4c176417b39159f3a772e0ce2b164136e12da730 100644
--- a/Source/core/dom/Element.h
+++ b/Source/core/dom/Element.h
@@ -170,9 +170,6 @@ public:
     void scrollIntoView(bool alignToTop = true);
     void scrollIntoViewIfNeeded(bool centerIfNeeded = true);
 
-    void distributeScroll(ScrollState&);
-    void applyScroll(ScrollState&);
-
     int offsetLeft();
     int offsetTop();
     int offsetWidth();
@@ -368,6 +365,14 @@ public:
     virtual void focus(bool restorePreviousSelection = true, WebFocusType = WebFocusTypeNone);
     virtual void updateFocusAppearance(bool restorePreviousSelection);
     virtual void blur();
+
+    void distributeScrollNative(ScrollState&);
+    void callDistributeScroll(ScrollState&);
+    void distributeScroll(ScrollState*);
+    void applyScrollNative(ScrollState&);
+    void callApplyScroll(ScrollState&);
+    void applyScroll(ScrollState*);
+
     // Whether this element can receive focus at all. Most elements are not
     // focusable but some elements, such as form controls and links, are. Unlike
     // layoutObjectIsFocusable(), this method may be called when layout is not up to