Avoid assert for isLegacyIntrinsic too

Source/core/svg/SVGLengthContext.cpp

Index: Source/core/svg/SVGLengthContext.cpp
diff --git a/Source/core/svg/SVGLengthContext.cpp b/Source/core/svg/SVGLengthContext.cpp
index cbbbc4ccb11222e305bf87f1fab896dd11c8c648..582cfcfae53267c9bf48c55509305cac2b2e16ff 100644
--- a/Source/core/svg/SVGLengthContext.cpp
+++ b/Source/core/svg/SVGLengthContext.cpp
@@ -178,7 +178,7 @@ float SVGLengthContext::valueForLength(const Length& length, float zoom, float d
     ASSERT(zoom != 0);
     // isIntrinsic can occur for 'width' and 'height', but has no
     // real meaning for svg.
-    if (length.isIntrinsic())
+    if (length.isIntrinsic() || length.isLegacyIntrinsic())
         return 0;
     return floatValueForLength(length, dimension * zoom) / zoom;
 }