blink: Cleanup class/struct forward declarations

third_party/WebKit/Source/core/svg/SVGViewElement.h

 /*
  * Copyright (C) 2004, 2005, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2007 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 10 matching lines @@
 #ifndef SVGViewElement_h
 #define SVGViewElement_h
 
 #include "core/svg/SVGElement.h"
 #include "core/svg/SVGFitToViewBox.h"
 #include "core/svg/SVGZoomAndPan.h"
 #include "platform/heap/Handle.h"
 
 namespace blink {
 
-class SVGStaticStringList;
-
 class SVGViewElement final : public SVGElement,
                              public SVGFitToViewBox,
                              public SVGZoomAndPan {
   DEFINE_WRAPPERTYPEINFO();
   USING_GARBAGE_COLLECTED_MIXIN(SVGViewElement);
 
  public:
   DECLARE_NODE_FACTORY(SVGViewElement);
   DECLARE_VIRTUAL_TRACE();
 
  private:
   explicit SVGViewElement(Document&);
 
   void parseAttribute(const QualifiedName&,
                       const AtomicString&,
                       const AtomicString&) override;
 
   bool layoutObjectIsNeeded(const ComputedStyle&) override { return false; }
 };
 
 }  // namespace blink
 
 #endif  // SVGViewElement_h