Use scroll customization primitives for touch scrolling (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 37bbc23ea9994629c7048d8d06368379b34c0bbf..2fddaa661c4d0a13e1305a1ecad4aff2522f1f16 100644
--- a/Source/core/dom/Element.h
+++ b/Source/core/dom/Element.h
@@ -61,6 +61,7 @@ class Locale;
 class MutableStylePropertySet;
 class PropertySetCSSStyleDeclaration;
 class PseudoElement;
+class ScrollState;
 class ScrollToOptions;
 class ShadowRoot;
 class StylePropertySet;
@@ -167,6 +168,9 @@ public:
     void scrollIntoView(bool alignToTop = true);
     void scrollIntoViewIfNeeded(bool centerIfNeeded = true);
 
+    void distributeScroll(ScrollState&);
+    void applyScroll(ScrollState&);
+
     int offsetLeft();
     int offsetTop();
     int offsetWidth();