Remove Element::textFromChildren().

sky/engine/core/dom/Element.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Peter Kelly (pmk@post.com)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003-2011, 2013, 2014 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
@@ skipping 277 matching lines @@
     void setContentEditable(const String&, ExceptionState&);
 
     bool spellcheck() const;
     void setSpellcheck(bool);
 
     const AtomicString& dir();
     void setDir(const AtomicString&);
 
     void click();
 
-    String textFromChildren();
-
 protected:
     Element(const QualifiedName& tagName, Document*, ConstructionType);
 
     const ElementData* elementData() const { return m_elementData.get(); }
     UniqueElementData& ensureUniqueElementData();
 
     virtual void insertedInto(ContainerNode*) override;
     virtual void removedFrom(ContainerNode*) override;
     virtual void childrenChanged(const ChildrenChange&) override;
 
@@ skipping 283 matching lines @@
     static PassRefPtr<T> create(const QualifiedName&, Document&)
 #define DEFINE_ELEMENT_FACTORY_WITH_TAGNAME(T) \
     PassRefPtr<T> T::create(const QualifiedName& tagName, Document& document) \
     { \
         return adoptRef(new T(tagName, document)); \
     }
 
 } // namespace
 
 #endif  // SKY_ENGINE_CORE_DOM_ELEMENT_H_