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

Source/core/rendering/svg/RenderSVGRect.cpp

Index: Source/core/rendering/svg/RenderSVGRect.cpp
diff --git a/Source/core/rendering/svg/RenderSVGRect.cpp b/Source/core/rendering/svg/RenderSVGRect.cpp
index efda77379dbd5ab36a5b81ff9cbf6669f6c096ec..e49e0a12d553b94bc03238f2a24dd5c5ab624198 100644
--- a/Source/core/rendering/svg/RenderSVGRect.cpp
+++ b/Source/core/rendering/svg/RenderSVGRect.cpp
@@ -54,20 +54,23 @@ void RenderSVGRect::updateShapeFromElement()
     ASSERT(rect);
 
     SVGLengthContext lengthContext(rect);
-    // Fallback to RenderSVGShape if rect has rounded corners or a non-scaling stroke.
-    if (rect->rx()->currentValue()->value(lengthContext) > 0 || rect->ry()->currentValue()->value(lengthContext) > 0 || hasNonScalingStroke()) {
-        RenderSVGShape::updateShapeFromElement();
-        m_usePathFallback = true;
-        return;
-    }
-
-    m_usePathFallback = false;
     FloatSize boundingBoxSize(rect->width()->currentValue()->value(lengthContext), rect->height()->currentValue()->value(lengthContext));
 
-    // Spec: "A negative value is an error. A value of zero disables rendering of the element."
-    if (boundingBoxSize.isZero() || boundingBoxSize.width() < 0 || boundingBoxSize.height() < 0)
+    // Spec: "A negative value is an error."
+    if (boundingBoxSize.width() < 0 || boundingBoxSize.height() < 0)
         return;
 
+    // Spec: "A value of zero disables rendering of the element."
+    if (boundingBoxSize.width() > 0 && boundingBoxSize.height() > 0) {
+        // Fallback to RenderSVGShape if rect has rounded corners or a non-scaling stroke.
+        if (rect->rx()->currentValue()->value(lengthContext) > 0 || rect->ry()->currentValue()->value(lengthContext) > 0 || hasNonScalingStroke()) {
+            RenderSVGShape::updateShapeFromElement();
+            m_usePathFallback = true;
+            return;
+        }
+        m_usePathFallback = false;
+    }
+
     m_fillBoundingBox = FloatRect(FloatPoint(rect->x()->currentValue()->value(lengthContext), rect->y()->currentValue()->value(lengthContext)), boundingBoxSize);
 
     // To decide if the stroke contains a point we create two rects which represent the inner and