Fix AXScrollbar from being recreated right after removal

Source/core/frame/FrameView.cpp

Index: Source/core/frame/FrameView.cpp
diff --git a/Source/core/frame/FrameView.cpp b/Source/core/frame/FrameView.cpp
index 19bfd555f4cc5e0ba3a61be3171147485f9590a8..2ef6ce1c136f02023b07327a3a3bdea306aa9642 100644
--- a/Source/core/frame/FrameView.cpp
+++ b/Source/core/frame/FrameView.cpp
@@ -3020,10 +3020,8 @@ void FrameView::didAddScrollbar(Scrollbar* scrollbar, ScrollbarOrientation orien
 void FrameView::willRemoveScrollbar(Scrollbar* scrollbar, ScrollbarOrientation orientation)
 {
     ScrollableArea::willRemoveScrollbar(scrollbar, orientation);
-    if (AXObjectCache* cache = axObjectCache()) {
+    if (AXObjectCache* cache = axObjectCache())
         cache->remove(scrollbar);
-        cache->handleScrollbarUpdate(this);
-    }
 }
 
 void FrameView::setTopControlsViewportAdjustment(float adjustment)
@@ -3074,6 +3072,8 @@ void FrameView::setHasHorizontalScrollbar(bool hasBar)
             adjustScrollbarsAvoidingResizerCount(-1);
         removeChild(m_horizontalScrollbar.get());
         m_horizontalScrollbar = nullptr;
+        if (AXObjectCache* cache = axObjectCache())
+            cache->handleScrollbarUpdate(this);
     }
 
     if (RuntimeEnabledFeatures::slimmingPaintEnabled())
@@ -3098,6 +3098,8 @@ void FrameView::setHasVerticalScrollbar(bool hasBar)
             adjustScrollbarsAvoidingResizerCount(-1);
         removeChild(m_verticalScrollbar.get());
         m_verticalScrollbar = nullptr;
+        if (AXObjectCache* cache = axObjectCache())
+            cache->handleScrollbarUpdate(this);
     }
 
     if (RuntimeEnabledFeatures::slimmingPaintEnabled())