Reduce forward declarations in core/svg

Source/core/svg/SVGTextContentElement.h

 /*
  * Copyright (C) 2004, 2005, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2008 Rob Buis <buis@kde.org>
  *
  * 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 20 matching lines @@
 
 class ExceptionState;
 
 enum SVGLengthAdjustType {
     SVGLengthAdjustUnknown,
     SVGLengthAdjustSpacing,
     SVGLengthAdjustSpacingAndGlyphs
 };
 template<> const SVGEnumerationStringEntries& getStaticStringEntries<SVGLengthAdjustType>();
 
-class SVGAnimatedTextLength;
-
 class SVGTextContentElement : public SVGGraphicsElement {
 public:
     // Forward declare enumerations in the W3C naming scheme, for IDL generation.
     enum {
         LENGTHADJUST_UNKNOWN = SVGLengthAdjustUnknown,
         LENGTHADJUST_SPACING = SVGLengthAdjustSpacing,
         LENGTHADJUST_SPACINGANDGLYPHS = SVGLengthAdjustSpacingAndGlyphs
     };
 
     unsigned getNumberOfChars();
@@ skipping 34 matching lines @@
 inline bool isSVGTextContentElement(const Node& node)
 {
     return node.isSVGElement() && toSVGElement(node).isTextContent();
 }
 
 DEFINE_ELEMENT_TYPE_CASTS_WITH_FUNCTION(SVGTextContentElement);
 
 } // namespace WebCore
 
 #endif