Scroll Customization Prototype (Not for review, WIP)

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 b25c4eb68cbc3224948f7241c28ad6d6a2f5ea51..b162df0f6eabe92a0917e67e0b13daa2251abba3 100644
--- a/Source/core/dom/Element.h
+++ b/Source/core/dom/Element.h
@@ -60,6 +60,7 @@ class Locale;
 class MutableStylePropertySet;
 class PropertySetCSSStyleDeclaration;
 class PseudoElement;
+class ScrollState;
 class ScrollToOptions;
 class ShadowRoot;
 class StylePropertySet;
@@ -166,6 +167,11 @@ public:
     void scrollIntoView(bool alignToTop = true);
     void scrollIntoViewIfNeeded(bool centerIfNeeded = true);
 
+    void callDistributeScroll(ScrollState*);
+    virtual void distributeScroll(ScrollState*);
+    void callApplyScroll(ScrollState*);
+    virtual void applyScroll(ScrollState*);
+
     int offsetLeft();
     int offsetTop();
     int offsetWidth();