Update list markers in notify change.

Source/core/layout/LayoutListItem.h

Index: Source/core/layout/LayoutListItem.h
diff --git a/Source/core/layout/LayoutListItem.h b/Source/core/layout/LayoutListItem.h
index 919f30a6e9d2c65ca1af394cb1425f5eaf5b296e..bb82199e019192a84fd5bf04386c93563c4cc4e0 100644
--- a/Source/core/layout/LayoutListItem.h
+++ b/Source/core/layout/LayoutListItem.h
@@ -60,6 +60,8 @@ public:
 
     bool isEmpty() const;
 
+    LayoutListMarker* marker() const { return m_marker; }
+
     virtual const char* name() const override { return "LayoutListItem"; }
 
 private:
@@ -72,11 +74,10 @@ private:
 
     virtual void paint(const PaintInfo&, const LayoutPoint&) override;
 
-    virtual void layout() override;
+    virtual void subtreeDidChange() final;
 
     // Returns true if we re-attached and updated the location of the marker.
     bool updateMarkerLocation();
-    void updateMarkerLocationAndInvalidateWidth();
 
     void positionListMarker();