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

Source/web/PopupListBox.h

 /*
  * Copyright (c) 2011, Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 244 matching lines @@
 
     // This is the index of the item marked as "selected" - i.e. displayed in
     // the widget on the page.
     int m_originalIndex;
 
     // This is the index of the item that the user is hovered over or has
     // selected using the keyboard in the list. They have not confirmed this
     // selection by clicking or pressing enter yet however.
     int m_selectedIndex;
 
-    // If >= 0, this is the index we should accept if the popup is "abandoned".
-    // This is used for keyboard navigation, where we want the
-    // selection to change immediately, and is only used if the settings
-    // acceptOnAbandon field is true.
-    int m_acceptedIndexOnAbandon;
-
     // This is the number of rows visible in the popup. The maximum number
     // visible at a time is defined as being kMaxVisibleRows. For a scrolled
     // popup, this can be thought of as the page size in data units.
     int m_visibleRows;
 
     // Our suggested width, not including scrollbar.
     int m_baseWidth;
 
     // The maximum height we can be without being off-screen.
     int m_maxHeight;
@@ skipping 32 matching lines @@
     RawPtrWillBeMember<PopupContainer> m_container;
 
     RefPtrWillBeMember<Scrollbar> m_verticalScrollbar;
     IntSize m_contentsSize;
     IntPoint m_scrollOffset;
 };
 
 } // namespace blink
 
 #endif