Implement :defined pseudo-class selector for Custom Elements

third_party/WebKit/Source/core/css/CSSSelector.h

 /*
  * Copyright (C) 1999-2003 Lars Knoll (knoll@kde.org)
  *               1999 Waldo Bastian (bastian@kde.org)
  * Copyright (C) 2004, 2006, 2007, 2008, 2009, 2010, 2013 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 183 matching lines @@
         PseudoInRange,
         PseudoOutOfRange,
         // Pseudo elements in UA ShadowRoots. Available in any stylesheets.
         PseudoWebKitCustomElement,
         // Pseudo elements in UA ShadowRoots. Availble only in UA stylesheets.
         PseudoBlinkInternalElement,
         PseudoCue,
         PseudoFutureCue,
         PseudoPastCue,
         PseudoUnresolved,
+        PseudoDefined,
         PseudoContent,
         PseudoHost,
         PseudoHostContext,
         PseudoShadow,
         PseudoSpatialNavigationFocus,
         PseudoListBox,
         PseudoHostHasAppearance,
         PseudoSlotted
     };
 
@@ skipping 265 matching lines @@
     if (m_hasRareData)
         return m_data.m_rareData->m_serializingValue;
     // AtomicString is really just a StringImpl* so the cast below is safe.
     // FIXME: Perhaps call sites could be changed to accept StringImpl?
     return *reinterpret_cast<const AtomicString*>(&m_data.m_value);
 }
 
 } // namespace blink
 
 #endif // CSSSelector_h