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

Source/core/svg/SVGFitToViewBox.h

Index: Source/core/svg/SVGFitToViewBox.h
diff --git a/Source/core/svg/SVGFitToViewBox.h b/Source/core/svg/SVGFitToViewBox.h
index 036b05b4b7e7d83264158c7c11e9a2e4278c5e1d..17d8e55fe4d057c66a21550203112327b2090ea5 100644
--- a/Source/core/svg/SVGFitToViewBox.h
+++ b/Source/core/svg/SVGFitToViewBox.h
@@ -54,14 +54,6 @@ public:
     {
         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) {