Remove TreatNullAs=NullString for HTMLMarqueeElement

LayoutTests/fast/dom/element-attribute-js-null.html

Index: LayoutTests/fast/dom/element-attribute-js-null.html
diff --git a/LayoutTests/fast/dom/element-attribute-js-null.html b/LayoutTests/fast/dom/element-attribute-js-null.html
index a1aa9b1ae3f8ca5e807afe53aa216a8acd493bfc..f0ec691c55f7a177a5758c59a799c6d4f6b0e4af 100644
--- a/LayoutTests/fast/dom/element-attribute-js-null.html
+++ b/LayoutTests/fast/dom/element-attribute-js-null.html
@@ -416,6 +416,17 @@
                         {name: 'name', expectedNull: 'null'}
                     ]
                 },
+                {
+                    type: 'HTMLMarqueeElement',
+                    elementToUse: document.createElement('marquee'),
+                    attributes: [
+                        {name: 'behavior', expectedNull: 'null'},
+                        {name: 'bgColor', expectedNull: 'null'},
+                        {name: 'direction', expectedNull: 'null'},
+                        {name: 'height', expectedNull: 'null'},
+                        {name: 'width', expectedNull: 'null'}
+                    ]
+                },
 
                 // HTMLMenuElement
                 // NONE