Replace various ScrollableArea scroll methods with setScrollPosition

Source/modules/accessibility/AXScrollbar.cpp

Index: Source/modules/accessibility/AXScrollbar.cpp
diff --git a/Source/modules/accessibility/AXScrollbar.cpp b/Source/modules/accessibility/AXScrollbar.cpp
index ded75fc27840200183b2ea38bae07b964983195d..778ff9498de785866c63d6d16fe75c528fbd55c7 100644
--- a/Source/modules/accessibility/AXScrollbar.cpp
+++ b/Source/modules/accessibility/AXScrollbar.cpp
@@ -106,7 +106,9 @@ void AXScrollbar::setValue(float value)
         return;
 
     float newValue = value * m_scrollbar->maximum();
-    m_scrollbar->scrollableArea()->scrollToOffsetWithoutAnimation(m_scrollbar->orientation(), newValue);
+
+    // TODO(bokan): This should potentially be a UserScroll.
+    m_scrollbar->scrollableArea()->setScrollPositionSingleAxis(m_scrollbar->orientation(), newValue, ProgrammaticScroll);
 }
 
 } // namespace blink