Remove the ability to parse HTML fragments

sky/engine/core/dom/DocumentFragment.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2009 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 15 matching lines @@
 
 #include "core/dom/ContainerNode.h"
 
 namespace blink {
 
 class DocumentFragment : public ContainerNode {
     DEFINE_WRAPPERTYPEINFO();
 public:
     static PassRefPtrWillBeRawPtr<DocumentFragment> create(Document&);
 
-    void parseHTML(const String&, Element* contextElement);
-
     virtual bool canContainRangeEndPoint() const override final { return true; }
     virtual bool isTemplateContent() const { return false; }
 
 protected:
     DocumentFragment(Document*, ConstructionType = CreateContainer);
     virtual String nodeName() const override final;
 
 private:
     virtual NodeType nodeType() const override final;
     virtual PassRefPtrWillBeRawPtr<Node> cloneNode(bool deep = true) override;
     virtual bool childTypeAllowed(NodeType) const override;
 
     bool isDocumentFragment() const WTF_DELETED_FUNCTION; // This will catch anyone doing an unnecessary check.
 };
 
 DEFINE_NODE_TYPE_CASTS(DocumentFragment, isDocumentFragment());
 
 } // namespace blink
 
 #endif // DocumentFragment_h