Remove support for anonymous deprecated flexboxes.

Source/core/rendering/RenderObject.cpp

Index: Source/core/rendering/RenderObject.cpp
diff --git a/Source/core/rendering/RenderObject.cpp b/Source/core/rendering/RenderObject.cpp
index abd3214a1dab818033b16d538add9a5afc4b6959..14f5b0ea59fd9c3f412b62d5848f0a42585526c6 100644
--- a/Source/core/rendering/RenderObject.cpp
+++ b/Source/core/rendering/RenderObject.cpp
@@ -195,7 +195,7 @@ RenderObject* RenderObject::createObject(Element* element, RenderStyle* style)
         return new RenderTableCaption(element);
     case BOX:
     case INLINE_BOX:
-        return new RenderDeprecatedFlexibleBox(element);
+        return new RenderDeprecatedFlexibleBox(*element);
     case FLEX:
     case INLINE_FLEX:
         return new RenderFlexibleBox(element);