Remove support for pseudo classes in <content select>.

Source/core/css/RuleFeature.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2003, 2004, 2005, 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.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 63 matching lines @@
         return m_attributeInvalidationSets.contains(attributeName);
     }
 
     bool hasSelectorForClass(const AtomicString& classValue) const
     {
         ASSERT(!classValue.isEmpty());
         return m_classInvalidationSets.contains(classValue);
     }
 
     bool hasSelectorForId(const AtomicString& idValue) const { return m_idInvalidationSets.contains(idValue); }
-    bool hasSelectorForPseudoType(CSSSelector::PseudoType pseudo) const { return m_pseudoInvalidationSets.contains(pseudo); }
 
     void collectInvalidationSetsForClass(InvalidationSetVector&, Element&, const AtomicString& className) const;
     void collectInvalidationSetsForId(InvalidationSetVector&, Element&, const AtomicString& id) const;
     void collectInvalidationSetsForAttribute(InvalidationSetVector&, Element&, const QualifiedName& attributeName) const;
     void collectInvalidationSetsForPseudoClass(InvalidationSetVector&, Element&, CSSSelector::PseudoType) const;
 
     bool hasIdsInSelectors() const
     {
         return m_idInvalidationSets.size() > 0;
     }
@@ skipping 76 matching lines @@
     InvalidationSetMap m_attributeInvalidationSets;
     InvalidationSetMap m_idInvalidationSets;
     PseudoTypeInvalidationSetMap m_pseudoInvalidationSets;
 };
 
 } // namespace blink
 
 WTF_ALLOW_MOVE_AND_INIT_WITH_MEM_FUNCTIONS(blink::RuleFeature);
 
 #endif // RuleFeature_h