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

Source/core/layout/LayoutMenuList.h

 /*
  * This file is part of the select element renderer in WebCore.
  *
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 72 matching lines @@
     virtual String itemText(unsigned listIndex) const override;
     virtual String itemToolTip(unsigned listIndex) const override;
     virtual String itemAccessibilityText(unsigned listIndex) const override;
     virtual bool itemIsEnabled(unsigned listIndex) const override;
     virtual PopupMenuStyle menuStyle() const override;
     virtual LayoutUnit clientPaddingLeft() const override;
     virtual LayoutUnit clientPaddingRight() const override;
     virtual int listSize() const override;
     virtual int selectedIndex() const override;
     virtual void popupDidHide() override;
+    virtual void popupDidCancel() override;
     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 provisionalSelectionChanged(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;
     virtual Element& ownerElement() const override;
     virtual const ComputedStyle* computedStyleForItem(Element&) const override;
 
     virtual bool hasLineIfEmpty() const override { return true; }
 
     // Flexbox defines baselines differently than regular blocks.
     // For backwards compatibility, menulists need to do the regular block behavior.
@@ skipping 19 matching lines @@
 
     bool m_optionsChanged;
     int m_optionsWidth;
 
     int m_lastActiveIndex;
 
     RefPtr<ComputedStyle> m_optionStyle;
 
     RefPtrWillBePersistent<PopupMenu> m_popup;
     bool m_popupIsVisible;
+    int m_indexToSelectOnCancel;
 
     // TODO(tkent): Use FRIEND_TEST macro provided by gtest_prod.h
     friend class LayoutMenuListTest_ElementRectRelativeToViewport_Test;
 };
 
 DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutMenuList, isMenuList());
 
 }
 
 #endif