Styling option should not override option:checked UA style

Source/core/css/CSSSelector.cpp

 /*
  * Copyright (C) 1999-2003 Lars Knoll (knoll@kde.org)
  *               1999 Waldo Bastian (bastian@kde.org)
  *               2001 Andreas Schlapbach (schlpbch@iam.unibe.ch)
  *               2001-2003 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2002, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2008 David Smith (catfish.man@gmail.com)
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 240 matching lines @@
     case PseudoPastCue:
     case PseudoUnresolved:
     case PseudoContent:
     case PseudoHost:
     case PseudoHostContext:
     case PseudoShadow:
     case PseudoFullScreen:
     case PseudoFullScreenDocument:
     case PseudoFullScreenAncestor:
     case PseudoSpatialNavigationFocus:
+    case PseudoListBox:
         return NOPSEUDO;
     case PseudoNotParsed:
         ASSERT_NOT_REACHED();
         return NOPSEUDO;
     }
 
     ASSERT_NOT_REACHED();
     return NOPSEUDO;
 }
 
 // Could be made smaller and faster by replacing pointer with an
 // offset into a string buffer and making the bit fields smaller but
 // that could not be maintained by hand.
 struct NameToPseudoStruct {
     const char* string;
     unsigned type:8;
 };
 
 // This table should be kept sorted.
 const static NameToPseudoStruct pseudoTypeMap[] = {
+{"-internal-list-box",            CSSSelector::PseudoListBox},
 {"-internal-spatial-navigation-focus", CSSSelector::PseudoSpatialNavigationFocus},
 {"-webkit-any(",                  CSSSelector::PseudoAny},
 {"-webkit-any-link",              CSSSelector::PseudoAnyLink},
 {"-webkit-autofill",              CSSSelector::PseudoAutofill},
 {"-webkit-drag",                  CSSSelector::PseudoDrag},
 {"-webkit-full-page-media",       CSSSelector::PseudoFullPageMedia},
 {"-webkit-full-screen",           CSSSelector::PseudoFullScreen},
 {"-webkit-full-screen-ancestor",  CSSSelector::PseudoFullScreenAncestor},
 {"-webkit-full-screen-document",  CSSSelector::PseudoFullScreenDocument},
 {"-webkit-resizer",               CSSSelector::PseudoResizer},
@@ skipping 234 matching lines @@
     case PseudoFullScreenDocument:
     case PseudoFullScreenAncestor:
     case PseudoInRange:
     case PseudoOutOfRange:
     case PseudoFutureCue:
     case PseudoPastCue:
     case PseudoHost:
     case PseudoHostContext:
     case PseudoUnresolved:
     case PseudoSpatialNavigationFocus:
+    case PseudoListBox:
         break;
     case PseudoFirstPage:
     case PseudoLeftPage:
     case PseudoRightPage:
         isPagePseudoClass = true;
         break;
     }
 
     bool matchPagePseudoClass = (m_match == PagePseudoClass);
     if (matchPagePseudoClass != isPagePseudoClass)
@@ skipping 232 matching lines @@
     case CSSSelector::PseudoNthLastOfType:
     case CSSSelector::PseudoFirstChild:
     case CSSSelector::PseudoLastChild:
     case CSSSelector::PseudoFirstOfType:
     case CSSSelector::PseudoLastOfType:
     case CSSSelector::PseudoOnlyOfType:
     case CSSSelector::PseudoHost:
     case CSSSelector::PseudoHostContext:
     case CSSSelector::PseudoNot:
     case CSSSelector::PseudoSpatialNavigationFocus:
+    case CSSSelector::PseudoListBox:
         return true;
     default:
         return false;
     }
 }
 
 bool CSSSelector::isCompound() const
 {
     if (!validateSubSelector(this))
         return false;
@@ skipping 98 matching lines @@
         if (count < nthBValue())
             return false;
         return (count - nthBValue()) % nthAValue() == 0;
     }
     if (count > nthBValue())
         return false;
     return (nthBValue() - count) % (-nthAValue()) == 0;
 }
 
 } // namespace blink