Implement <select> Popup Menu using PagePopup

Source/core/rendering/RenderMenuList.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 79 matching lines @@
     virtual LayoutUnit clientPaddingRight() const override;
     virtual int listSize() const override;
     virtual int selectedIndex() const override;
     virtual void popupDidHide() 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 listBoxSelectItem(int listIndex, bool allowMultiplySelections, bool shift, bool fireOnChangeNow = true) override;
     virtual bool multiple() const override;
+    virtual IntRect elementRectRelativeToRootView() const override;
+    virtual Element& ownerElement() const override;
+    virtual RenderStyle* renderStyleForItem(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.
     virtual int baselinePosition(FontBaseline baseline, bool firstLine, LineDirectionMode direction, LinePositionMode position) const override
     {
         return RenderBlock::baselinePosition(baseline, firstLine, direction, position);
     }
     virtual int firstLineBoxBaseline() const override { return RenderBlock::firstLineBoxBaseline(); }
@@ skipping 21 matching lines @@
 
     RefPtrWillBeMember<PopupMenu> m_popup;
     bool m_popupIsVisible;
 };
 
 DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderMenuList, isMenuList());
 
 }
 
 #endif