Don't render empty shapes with non-scaling-stroke

Source/core/rendering/svg/RenderSVGEllipse.cpp

Index: Source/core/rendering/svg/RenderSVGEllipse.cpp
diff --git a/Source/core/rendering/svg/RenderSVGEllipse.cpp b/Source/core/rendering/svg/RenderSVGEllipse.cpp
index bc3cfaea44be297b3752b1b772ab79e5cb10d9ea..5f77644c72b266b5614265c0299ef52dd9c6a94f 100644
--- a/Source/core/rendering/svg/RenderSVGEllipse.cpp
+++ b/Source/core/rendering/svg/RenderSVGEllipse.cpp
@@ -53,20 +53,22 @@ void RenderSVGEllipse::updateShapeFromElement()
     m_center = FloatPoint();
     m_radii = FloatSize();
 
-    // Fallback to RenderSVGShape if shape has a non-scaling stroke.
-    if (hasNonScalingStroke()) {
-        RenderSVGShape::updateShapeFromElement();
-        m_usePathFallback = true;
-        return;
-    } else
-        m_usePathFallback = false;
-
     calculateRadiiAndCenter();
 
     // Spec: "A negative value is an error. A value of zero disables rendering of the element."
-    if (m_radii.isZero() || m_radii.width() < 0 || m_radii.height() < 0)
+    if (m_radii.width() < 0 || m_radii.height() < 0)
         return;
 
+    if (!m_radii.isEmpty()) {
+        // Fallback to RenderSVGShape if shape has a non-scaling stroke.
+        if (hasNonScalingStroke()) {
+            RenderSVGShape::updateShapeFromElement();
+            m_usePathFallback = true;
+            return;
+        }
+        m_usePathFallback = false;
+    }
+
     m_fillBoundingBox = FloatRect(m_center.x() - m_radii.width(), m_center.y() - m_radii.height(), 2 * m_radii.width(), 2 * m_radii.height());
     m_strokeBoundingBox = m_fillBoundingBox;
     if (style()->svgStyle()->hasStroke())