[SVG] SVGAnimatedBoolean migration to new SVG property impl.

Source/core/svg/SVGLength.h

 /*
  * Copyright (C) 2004, 2005, 2006, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006 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 13 matching lines @@
 #include "bindings/v8/ExceptionMessages.h"
 #include "bindings/v8/ExceptionStatePlaceholder.h"
 #include "bindings/v8/ScriptWrappable.h"
 #include "core/dom/ExceptionCode.h"
 #include "core/svg/SVGLengthContext.h"
 #include "core/svg/SVGParsingError.h"
 #include "core/svg/properties/NewSVGProperty.h"
 
 namespace WebCore {
 
+/* use SVGLength.h decls */
 class CSSPrimitiveValue;
 class ExceptionState;
 class QualifiedName;
 
 enum SVGLengthNegativeValuesMode {
     AllowNegativeLengths,
     ForbidNegativeLengths
 };
 
 class SVGLengthTearOff;
@@ skipping 72 matching lines @@
 inline PassRefPtr<SVGLength> toSVGLength(PassRefPtr<NewSVGPropertyBase> passBase)
 {
     RefPtr<NewSVGPropertyBase> base = passBase;
     ASSERT(base->type() == SVGLength::classType());
     return static_pointer_cast<SVGLength>(base.release());
 }
 
 } // namespace WebCore
 
 #endif // SVGLength_h