Remove custom style callbacks.

sky/engine/core/dom/shadow/InsertionPoint.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.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 49 matching lines @@
 
     bool shouldUseFallbackElements() const;
 
     size_t size() const { return m_distribution.size(); }
     Node* at(size_t index)  const { return m_distribution.at(index).get(); }
     Node* first() const { return m_distribution.isEmpty() ? 0 : m_distribution.first().get(); }
     Node* last() const { return m_distribution.isEmpty() ? 0 : m_distribution.last().get(); }
     Node* nextTo(const Node* node) const { return m_distribution.nextTo(node); }
     Node* previousTo(const Node* node) const { return m_distribution.previousTo(node); }
 
-    virtual void trace(Visitor*) override;
+    void willRecalcStyle(StyleRecalcChange);
 
 protected:
     InsertionPoint(const QualifiedName&, Document&);
     virtual bool rendererIsNeeded(const RenderStyle&) override;
     virtual void childrenChanged(const ChildrenChange&) override;
     virtual InsertionNotificationRequest insertedInto(ContainerNode*) override;
     virtual void removedFrom(ContainerNode*) override;
-    virtual void willRecalcStyle(StyleRecalcChange) override;
 
 private:
     bool isInsertionPoint() const = delete; // This will catch anyone doing an unnecessary check.
 
     ContentDistribution m_distribution;
     bool m_registeredWithShadowRoot;
 };
 
 typedef Vector<RefPtr<InsertionPoint> > DestinationInsertionPoints;
 
@@ skipping 23 matching lines @@
     return 0;
 }
 
 const InsertionPoint* resolveReprojection(const Node*);
 
 void collectDestinationInsertionPoints(const Node&, Vector<RawPtr<InsertionPoint>, 8>& results);
 
 } // namespace blink
 
 #endif // InsertionPoint_h