Remove support for pseudo classes in <content select>.

Source/core/dom/shadow/ElementShadow.h

 /*
  * Copyright (C) 2012 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.
  *     * Neither the name of Google Inc. nor the names of its
@@ skipping 40 matching lines @@
     ShadowRoot* oldestShadowRoot() const { return m_shadowRoots.tail(); }
     ElementShadow* containingShadow() const;
 
     ShadowRoot& addShadowRoot(Element& shadowHost, ShadowRoot::ShadowRootType);
 
     bool hasSameStyles(const ElementShadow*) const;
 
     void attach(const Node::AttachContext&);
     void detach(const Node::AttachContext&);
 
-    void distributedNodePseudoStateChanged(CSSSelector::PseudoType);
     void willAffectSelector();
     const SelectRuleFeatureSet& ensureSelectFeatureSet();
 
     void distributeIfNeeded();
     void setNeedsDistributionRecalc();
 
     const InsertionPoint* finalDestinationInsertionPointFor(const Node*) const;
     const DestinationInsertionPoints* destinationInsertionPointsFor(const Node*) const;
 
     void didDistributeNode(const Node*, InsertionPoint*);
@@ skipping 62 matching lines @@
 inline void ElementShadow::distributeIfNeeded()
 {
     if (m_needsDistributionRecalc)
         distribute();
     m_needsDistributionRecalc = false;
 }
 
 } // namespace
 
 #endif