[SVG] Move negative viewBox width/height reporting to SVGAnimatedViewBoxRect

Source/core/svg/SVGFitToViewBox.h

 /*
  * Copyright (C) 2004, 2005, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2010 Rob Buis <buis@kde.org>
  * Copyright (C) 2014 Samsung Electronics. 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 36 matching lines @@
 
     static AffineTransform viewBoxToViewTransform(const FloatRect& viewBoxRect, PassRefPtr<SVGPreserveAspectRatio>, float viewWidth, float viewHeight);
 
     static bool isKnownAttribute(const QualifiedName&);
     static void addSupportedAttributes(HashSet<QualifiedName>&);
 
     bool parseAttribute(const QualifiedName& name, const AtomicString& value, Document& document, SVGParsingError& parseError)
     {
         if (name == SVGNames::viewBoxAttr) {
             m_viewBox->setBaseValueAsString(value, parseError);
-            if (m_viewBox->baseValue()->width() < 0.0f) {
-                document.accessSVGExtensions().reportError("A negative value for ViewBox width is not allowed");
-                m_viewBox->baseValue()->setInvalid();
-            }
-            if (m_viewBox->baseValue()->height() < 0.0f) {
-                document.accessSVGExtensions().reportError("A negative value for ViewBox height is not allowed");
-                m_viewBox->baseValue()->setInvalid();
-            }
             return true;
         }
         if (name == SVGNames::preserveAspectRatioAttr) {
             m_preserveAspectRatio->setBaseValueAsString(value, parseError);
             return true;
         }
         return false;
     }
 
     bool hasEmptyViewBox() const { return m_viewBox->currentValue()->isValid() && m_viewBox->currentValue()->value().isEmpty(); }
 
     // JS API
     SVGAnimatedRect* viewBox() const { return m_viewBox.get(); }
     SVGAnimatedPreserveAspectRatio* preserveAspectRatio() const { return m_preserveAspectRatio.get(); }
 
 protected:
     explicit SVGFitToViewBox(SVGElement*, PropertyMapPolicy = PropertyMapPolicyAdd);
     void updateViewBox(const FloatRect&);
     void clearViewBox() { m_viewBox = nullptr; }
     void clearPreserveAspectRatio() { m_preserveAspectRatio = nullptr; }
 
 private:
     RefPtr<SVGAnimatedRect> m_viewBox;
     RefPtr<SVGAnimatedPreserveAspectRatio> m_preserveAspectRatio;
 };
 
 } // namespace blink
 
 #endif // SVGFitToViewBox_h