Fix issue on <select> style change when popup is visible

Source/core/layout/LayoutMenuList.h

Index: Source/core/layout/LayoutMenuList.h
diff --git a/Source/core/layout/LayoutMenuList.h b/Source/core/layout/LayoutMenuList.h
index 5a33e6af426f80b8970f6d2bad9899cee8e0f1e5..13b9a216616ca22bb73e4d4ce373eb085975ec8f 100644
--- a/Source/core/layout/LayoutMenuList.h
+++ b/Source/core/layout/LayoutMenuList.h
@@ -93,7 +93,7 @@ private:
     virtual bool itemIsSeparator(unsigned listIndex) const override;
     virtual bool itemIsLabel(unsigned listIndex) const override;
     virtual bool itemIsSelected(unsigned listIndex) const override;
-    virtual void setTextFromItem(unsigned listIndex) override;
+    virtual void setProvisionallySelectedListIndex(unsigned) override;
     virtual void listBoxSelectItem(int listIndex, bool allowMultiplySelections, bool shift, bool fireOnChangeNow = true) override;
     virtual bool multiple() const override;
     virtual IntRect elementRectRelativeToViewport() const override;
@@ -133,6 +133,7 @@ private:
 
     RefPtrWillBePersistent<PopupMenu> m_popup;
     bool m_popupIsVisible;
+    int m_popupTemporarySelectedIndex;
 };
 
 DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutMenuList, isMenuList());